如何在流程完成之前显示 "please wait gif" 图片
how can I show "please wait gif" image before the process is complete
我想在 ListApp() class 进程完成之前显示来自 img() class 的“请稍候 gif”图像，然后在 class完成后应该会显示ListApp的画面。
我正在尝试以下代码，但它没有启动 ListApp() 的进程class
run1.py 文件
from kivy.lang import Builder
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty
from Option import OptionApp
import sys, time, threading
from kivy.uix.screenmanager import ScreenManager, Screen
from datetime import datetime
import pandas_datareader.data as web
import pandas as pd
from kivymd.uix.screen import Screen
from kivymd.uix.list import MDList,ThreeLineListItem,ThreeLineAvatarIconListItem
from kivymd.uix.list import IconLeftWidget,ImageLeftWidget
from kivy.uix.scrollview import ScrollView
from kivy.uix.button import Button
from kivymd.app import MDApp
from kivy.app import App
from kivy.properties import ObjectProperty
import csv
from os import path
from kivy.uix.image import Image
from kivy.app import App
from kivy.uix.textinput import TextInput
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import NumericProperty, ListProperty, BooleanProperty, ObjectProperty, StringProperty
from kivy.uix.recycleview import RecycleView
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.label import Label
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
import pandas as pd
kv = Builder.load_file("run1.kv")
class SelectableRecycleBoxLayout(FocusBehavior, LayoutSelectionBehavior,
RecycleBoxLayout):
''' Adds selection and focus behaviour to the view. '''
class SelectableLabel(RecycleDataViewBehavior, Label):
''' Add selection support to the Label '''
index = None
selected = BooleanProperty(False)
selectable = BooleanProperty(True)
txt_input1 = ObjectProperty(None)
txt_input = ObjectProperty(None)
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super(SelectableLabel, self).refresh_view_attrs(
rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(SelectableLabel, self).on_touch_down(touch):
return True
if self.collide_point(*touch.pos) and self.selectable:
return self.parent.select_with_touch(self.index, touch)
def apply_selection(self, rv, index, is_selected):
''' Respond to the selection of items in the view. '''
self.selected = is_selected
if is_selected:
# self.root.ids.txt_input1.text = str(rv.data[index].get("text"))
App.get_running_app().root.widget_1.ids.txt_input1.text = str(rv.data[index].get("text"))
class RV(RecycleView):
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
class DropDownWidget(BoxLayout):
txt_input = ObjectProperty()
rv = ObjectProperty()
txt_input1 = ObjectProperty()
class MyTextInput(TextInput):
txt_input = ObjectProperty()
txt_input1 = ObjectProperty(None)
flt_list = ObjectProperty()
word_list = ListProperty()
# this is the variable storing the number to which the look-up will start
starting_no = NumericProperty(3)
suggestion_text = ''
def __init__(self, **kwargs):
super(MyTextInput, self).__init__(**kwargs)
def on_text(self, instance, value):
# find all the occurrence of the word
self.parent.ids.rv.data = []
matches = [self.word_list[i] for i in range(len(self.word_list)) if
self.word_list[i][:self.starting_no] == value[:self.starting_no]]
# display the data in the recycleview
display_data = []
for i in matches:
display_data.append({'text': i})
self.parent.ids.rv.data = display_data
# ensure the size is okay
if len(matches) <= 10:
self.parent.height = (50 + (len(matches) * 20))
else:
self.parent.height = 240
def keyboard_on_key_down(self, window, keycode, text, modifiers):
if self.suggestion_text and keycode[1] == 'tab':
self.insert_text(self.suggestion_text + ' ')
return True
return super(MyTextInput, self).keyboard_on_key_down(window, keycode, text, modifiers)
class Body(Screen):
def __init__(self, **kwargs):
super(Body, self).__init__(**kwargs)
f = pd.read_csv("stoploss.csv")
fl = len(f.index)
file = pd.DataFrame(f, columns=['Stock Symbol', 'Purchase Price', 'Stock Name', 'Stop Loss(%)'])
j = 0
wl = []
for i in range(fl):
for index in range(1):
columnSeriesObj = file.iloc[:, 2]
# pp = iter(columnSeriesObj.values)
# pp1 = next(pp)
# print(pp1)
wl.append(columnSeriesObj.values[i])
tp = tuple(wl)
print(str(tp))
self.widget_1 = DropDownWidget(pos_hint={'center_x': .5, 'center_y': .5},
size_hint=(None, None), size=(600, 60))
self.widget_1.ids.txt_input.word_list = wl
self.widget_1.ids.txt_input.starting_no = 3
self.add_widget(self.widget_1)
class signin(Screen):
user_name = ObjectProperty(None)
def btn(self):
username = self.user_name.text
print(username)
sm.current = 'option_screen'
class option(Screen):
def btn_addstock(self):
sm.current = 'body_screen'
def btn_stoplosslist(self):
sm.canvas.clear()
sm.current = 'Stoploss_ip'
class stockinput(Screen):
stock_name = ObjectProperty(None)
stock_symbol = ObjectProperty(None)
purchase_price = ObjectProperty(None)
stop_loss = ObjectProperty(None)
def btn(self):
end = datetime.today().date()
start = end.year - 10
start = datetime(start, datetime.today().month, datetime.today().day).date()
uname = input("Enter user name: ")
print("Stock Name:", self.stock_name.text, "Stock Symbol:", self.stock_symbol.text)
print("Purchase Price:",self.purchase_price.text,"Stop Loss(%):",self.stop_loss.text)
#write data to csv file
# if path.exists("stoploss.csv"):
# myFile = open('stoploss.csv', 'a')
# else:
# myFile = open('stoploss.csv', 'w')
file_name = stockinput.uname + "_stoploss.csv"
if path.exists(file_name):
with open(file_name, "a+", newline='')as newFile :
fieldnames = ["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"]
newFileWriter = csv.DictWriter(newFile, fieldnames=fieldnames)
newFileWriter.writerow({"Stock Name" : self.stock_name.text,"Stock Symbol" : self.stock_symbol.text,"Purchase Price" : self.purchase_price.text,"Stop Loss(%)" : self.stop_loss.text})
else:
myFile = open(file_name, 'w+')
myData = [["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"],[self.stock_name.text, self.stock_symbol.text, self.purchase_price.text, self.stop_loss.text]]
with myFile:
writer = csv.writer(myFile)
writer.writerows(myData)
df = web.DataReader(self.stock_symbol.text, 'yahoo', start, end,)
print(df.tail())
self.stock_name.text = ""
self.stock_symbol.text = ""
self.purchase_price.text = ""
self.stop_loss.text = ""
f = pd.read_csv("stoploss.csv")
file = pd.DataFrame(f, columns=['Stock Symbol','Purchase Price','Stock Name','Stop Loss(%)'])
class img(Screen):
def build(self,**kwargs):
super(img, self).__init__(**kwargs)
screen = self
image = Image(source='please_wait.gif')
screen.add_widget(image)
class ListApp(Screen):
# def imgpr(self,**kwargs):
# super(ListApp, self).__init__(**kwargs)
#
# time.sleep(0.1)
# t = threading.Thread(target=imgpr)
# t.start()
def build(self,**kwargs):
super(ListApp, self).__init__(**kwargs)
flag = True
screen = self
# if flag:
#
#
# sm.add_widget(ListApp(name='Stoploss_ip'))
end = datetime(2020, 12, 14)
start = datetime(2020, 12, 14)
btn = Button(text="Back",
font_size="20sp",
background_color=(255/255, 229/255, 204/255, 1),
color=(1, 1, 1, 1),
size=(12, 12),
size_hint=(.1, .05),
pos=(600, 500))
btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))
scroll = ScrollView()
list_view = MDList()
scroll.add_widget(list_view)
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
else:
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],
secondary_text='Close price: ' + str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
print("Something went wrong")
print("Done")
# flag = False
# if flag ==False:
screen.add_widget(scroll)
screen.add_widget(btn)
# return screen
class WindowsManager(ScreenManager):
pass
sm = ScreenManager()
sm.add_widget(signin(name='signin_screen'))
sm.add_widget(option(name='option_screen'))
sm.add_widget(stockinput(name='stockinput_screen'))
sm.add_widget(img(name='image_screen'))
sm.add_widget(ListApp(name='Stoploss_ip'))
sm.add_widget(Body(name='body_screen'))
class run1(MDApp):
def build(self):
return sm
if __name__ == "__main__":
run1().run()
run1.kv 文件
<WindowsManager>:
signin:
option:
stockinput:
ListApp:
Body:
<Body>:
name: 'body_screen'
canvas.before:
Color:
rgba: 188/255, 143/255, 145/255, 1
Rectangle:
pos: self.pos
size: self.size
<DropDownWidget>:
id: DropDownWidget
canvas:
Color:
rgba:(1, 1, 1, 1)
Rectangle:
# pos: self.pos
size: self.size
# orientation: 'vertical'
spacing: 20
txt_input: txt_input
rv: rv
txt_input1: txt_input1
MyTextInput:
id: txt_input1
pos: 400,300
size_hint_y: None
height: 50
MyTextInput:
id: txt_input
hint_text:'Enter here'
size_hint_y: None
height: 50
RV:
id: rv
<MyTextInput>:
id: MyTextInput
readonly: False
multiline: False
<SelectableLabel>:
id: SelectableLabel
# Draw a background to indicate selection
color: 0,0,0,1
canvas.before:
Color:
rgba: (0, 0, 1, .5) if self.selected else (1, 1, 1, 1)
Rectangle:
# pos: self.pos
size: self.size
<RV>:
canvas:
Color:
rgba: 0,0,0,.2
Line:
rectangle: self.x +1 , self.y, self.width - 2, self.height -2
bar_width: 10
scroll_type:['bars']
viewclass: 'SelectableLabel'
SelectableRecycleBoxLayout:
default_size: None, dp(20)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
multiselect: False
<signin>:
canvas.before:
Color:
rgba: 164/255, 66/255, 220/255, 1
Rectangle:
pos: self.pos
size: self.size
name: 'signin_screen'
user_name: user_name
GridLayout:
pos_hint: {'center_x': .75, 'center_y': .15}
row_force_default : True
row_default_height : 50
col_force_default : True
col_default_width : 400
spacing: '15dp'
cols: 1
TextInput:
id: user_name
multiline:False
size_hint: 5.0 ,.1
hint_text: "Email_ID"
Button:
text:"Submit"
font_size: 20
color:0,0,0,1
size_hint: .5 ,.3
background_normal: ''
background_color: (255/255, 153/255, 71/255, 1)
on_press : root.btn()
Label:
text:"Please Do not change the Email_ID. Data will be saved as per your Email_ID"
pos: 180,80
<option>:
canvas.before:
Color:
rgba: 138/255, 104/255, 175/255, 1
Rectangle:
pos: self.pos
size: self.size
name: 'option_screen'
GridLayout:
pos_hint: {'center_x': .83, 'center_y': .18}
row_force_default : True
row_default_height : 100
col_force_default : True
col_default_width : 250
spacing: '20dp'
cols:1
Button:
text:"Add Stock"
color:0,0,0,1
font_size: 18
size_hint: .1 ,.1
pos: 150,150
background_normal: ''
background_color: (204/255, 0, 204/255, 1)
on_press : root.manager.current = 'body_screen'
Button:
text:"Check Stoploss"
color:0,0,0,1
font_size: 18
size_hint: .1 ,.1
pos: 250,120
background_normal: ''
background_color:(127/255, 193/255, 184/255, 1)
on_press : root.manager.current = 'Stoploss_ip'
<stockinput>:
canvas.before:
Color:
rgba: 188/255, 143/255, 145/255, 1
Rectangle:
pos: self.pos
size: self.size
name: 'stockinput_screen'
stock_name: stock_name
stock_symbol: stock_symbol
purchase_price: purchase_price
stop_loss: stop_loss
GridLayout:
pos_hint: {'center_x': .67, 'center_y': .2}
row_force_default : True
row_default_height : 40
col_force_default : True
col_default_width : 250
spacing: '10dp'
cols:2
# pos_hint: {'center_x': .53, 'center_y': .12}
# row_force_default : True
# row_default_height : 30
# col_force_default : True
# col_default_width : 250
# spacing: '20dp'
Label:
text: "Stock Name: "
TextInput:
id: stock_name
multiline:False
Label:
text: "Stock Symbol: "
TextInput:
id: stock_symbol
multiline:False
Label:
text: "Purchase Price: "
TextInput:
id: purchase_price
multiline:False
Label:
text: "Stop Loss(%): "
TextInput:
id: stop_loss
multiline:False
Button:
text:"Submit"
color:102/255, 204/255, 0, 1
font_size:18
background_color: (204/255, 0, 102/255, 1)
on_press: root.btn()
Button:
text:"Back"
color:0,0,0,1
font_size:18
background_normal: ''
background_color: (204/255, 102/255, 0, 1)
on_press: root.manager.current = 'option_screen'
<img>:
name: 'image_screen'
on_enter:root.build()
<ListApp>:
name: 'Stoploss_ip'
on_enter:root.build()
**更新
我尝试在 build() 方法中添加 2 行并显示图像 now.I 认为它预加载图像并将它们保存在缓存中。
class ListApp(Screen):
def build(self):
self.popup = Popup(title='Calculating Stoploss', content=Image(source='please_wait.gif'))
self.profit = ImageLeftWidget(source='profit.jpg')
self.loss = ImageLeftWidget(source='loss.png')
self.popup.open()
# Clock.schedule_once(partial(self.actual_build))
threading.Thread(target=self.actual_build).start()
def actual_build(self):
screen = self
end = datetime.today().date()
start = end
btn = Button(text="Back",
font_size="20sp",
background_color=(255/255, 229/255, 204/255, 1),
color=(1, 1, 1, 1),
size=(12, 12),
size_hint=(.1, .05),
pos=(600, 500))
btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))
scroll = ScrollView()
list_view = MDList()
scroll.add_widget(list_view)
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
else:
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],
secondary_text='Close price: ' + str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
pass
# print("Something went wrong")
print("Done")
# screen.add_widget(screen.scroll)
# screen.add_widget(btn)
Clock.schedule_once(partial(screen.finish_build, scroll, btn))
screen.popup.dismiss()
def finish_build(self, scroll, btn, dt):
screen = self
screen.add_widget(scroll)
screen.add_widget(btn)
由于您是通过使用 on_enter 属性触发 build() 方法，因此您可以使用该方法完成您想要的。
首先，您拨打的是：
super(ListApp, self).__init__(**kwargs)
来自 build() 方法。您不应调用该 super 方法，除非是在 __init__() 方法覆盖内。所以应该删除该行。由于你还没有为ListApp编写__init__()方法，所以没有必要调用super class __init__().
我建议将您的 build() 方法重命名为 actual_build()，如下所示：
def actual_build(self, *args):
并定义一个新的 build() 方法为：
def build(self, **kwargs):
self.popup = Popup(title='Preparing ListApp', content=Image(source='please_wait.gif', anim_delay=0.05))
self.popup.open()
threading.Thread(target=self.actual_build).start()
上述方法显示动画 gif，并启动 actual_build() 方法（以前名为 build()）。
然后，修改actual_build()方法为：
def actual_build(self, *args):
# super(ListApp, self).__init__(**kwargs)
flag = True
screen = self
# if flag:
#
#
# sm.add_widget(ListApp(name='Stoploss_ip'))
end = datetime(2020, 12, 14)
start = datetime(2020, 12, 14)
btn = Button(text="Back",
font_size="20sp",
background_color=(255/255, 229/255, 204/255, 1),
color=(1, 1, 1, 1),
size=(12, 12),
size_hint=(.1, .05),
pos=(600, 500))
btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))
scroll = ScrollView()
list_view = MDList()
scroll.add_widget(list_view)
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
else:
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],
secondary_text='Close price: ' + str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
print("Something went wrong")
# flag = False
# if flag ==False:
# screen.add_widget(scroll)
# screen.add_widget(btn)
# schedule the code that must be run on the main thread
Clock.schedule_once(partial(self.finish_build, scroll, btn))
# dismiss the animated gif
self.popup.dismiss()
上面的 actual_build() 方法完成了原始 build() 方法所做的一切，除了对 GUI 的实际更改（必须在主线程上完成）。在此方法结束时，安排对 finish_build() 的调用，并关闭动画 gif Popup。
最后，添加一个 finish_build() 方法来执行实际的 GUI 更改：
def finish_build(self, scroll, btn, dt):
screen = self
screen.add_widget(scroll)
screen.add_widget(btn)
现在我实际上可以 运行 你的代码了，我有一个更新的答案。首先，一些 ListApp 屏幕可以在 kv 文件中构造为：
<ListApp>:
name: 'Stoploss_ip'
on_enter:root.build()
ScrollView:
MDList:
id: list_view
Button:
text: "Back"
font_size: "20sp"
background_color: (255/255, 229/255, 204/255, 1)
color: (1, 1, 1, 1)
size: (12, 12)
size_hint: (.1, .05)
pos: (600, 500)
on_press: root.manager.current = "option_screen"
那么ListApp class可以是：
class ListApp(Screen):
built = BooleanProperty(False)
def build(self):
if self.built:
return
self.built = True
self.popup = Popup(title='Calculating Stoploss', content=Image(source='please_wait.gif'))
self.popup.open()
threading.Thread(target=self.actual_build).start()
def actual_build(self):
end = datetime.today().date()
start = end
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
Clock.schedule_once(partial(self.add_loss, Objname.values[i], str(cp1), str(sl)))
i=i+1
else:
Clock.schedule_once(partial(self.add_profit, Objname.values[i], str(cp1), str(sl)))
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
pass
# print("Something went wrong")
print("Done")
self.popup.dismiss()
def add_loss(self, name, close_price, stop_loss, dt):
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + name, secondary_text='Close price: '+close_price,
tertiary_text='Stoploss: ' + stop_loss)
items.add_widget(image)
self.ids.list_view.add_widget(items)
def add_profit(self, name, close_price, stop_loss, dt):
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + name,
secondary_text='Close price: ' + close_price,
tertiary_text='Stoploss: ' + stop_loss)
items.add_widget(image)
self.ids.list_view.add_widget(items)
更改的主要项目是列表和后退按钮是在 'kv' 中构建的，列表的项目是使用 Clock.schedule_once() 构建的。不再需要 finish_build() 方法。
另外，请注意我添加了一个 built 属性来跟踪屏幕是否已构建，这样屏幕就不会构建多次。如果多次构建，列表中的项目将被重复添加。
我想在 ListApp() class 进程完成之前显示来自 img() class 的“请稍候 gif”图像，然后在 class完成后应该会显示ListApp的画面。
我正在尝试以下代码，但它没有启动 ListApp() 的进程class
run1.py 文件
from kivy.lang import Builder
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty
from Option import OptionApp
import sys, time, threading
from kivy.uix.screenmanager import ScreenManager, Screen
from datetime import datetime
import pandas_datareader.data as web
import pandas as pd
from kivymd.uix.screen import Screen
from kivymd.uix.list import MDList,ThreeLineListItem,ThreeLineAvatarIconListItem
from kivymd.uix.list import IconLeftWidget,ImageLeftWidget
from kivy.uix.scrollview import ScrollView
from kivy.uix.button import Button
from kivymd.app import MDApp
from kivy.app import App
from kivy.properties import ObjectProperty
import csv
from os import path
from kivy.uix.image import Image
from kivy.app import App
from kivy.uix.textinput import TextInput
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import NumericProperty, ListProperty, BooleanProperty, ObjectProperty, StringProperty
from kivy.uix.recycleview import RecycleView
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.label import Label
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
import pandas as pd
kv = Builder.load_file("run1.kv")
class SelectableRecycleBoxLayout(FocusBehavior, LayoutSelectionBehavior,
RecycleBoxLayout):
''' Adds selection and focus behaviour to the view. '''
class SelectableLabel(RecycleDataViewBehavior, Label):
''' Add selection support to the Label '''
index = None
selected = BooleanProperty(False)
selectable = BooleanProperty(True)
txt_input1 = ObjectProperty(None)
txt_input = ObjectProperty(None)
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super(SelectableLabel, self).refresh_view_attrs(
rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(SelectableLabel, self).on_touch_down(touch):
return True
if self.collide_point(*touch.pos) and self.selectable:
return self.parent.select_with_touch(self.index, touch)
def apply_selection(self, rv, index, is_selected):
''' Respond to the selection of items in the view. '''
self.selected = is_selected
if is_selected:
# self.root.ids.txt_input1.text = str(rv.data[index].get("text"))
App.get_running_app().root.widget_1.ids.txt_input1.text = str(rv.data[index].get("text"))
class RV(RecycleView):
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
class DropDownWidget(BoxLayout):
txt_input = ObjectProperty()
rv = ObjectProperty()
txt_input1 = ObjectProperty()
class MyTextInput(TextInput):
txt_input = ObjectProperty()
txt_input1 = ObjectProperty(None)
flt_list = ObjectProperty()
word_list = ListProperty()
# this is the variable storing the number to which the look-up will start
starting_no = NumericProperty(3)
suggestion_text = ''
def __init__(self, **kwargs):
super(MyTextInput, self).__init__(**kwargs)
def on_text(self, instance, value):
# find all the occurrence of the word
self.parent.ids.rv.data = []
matches = [self.word_list[i] for i in range(len(self.word_list)) if
self.word_list[i][:self.starting_no] == value[:self.starting_no]]
# display the data in the recycleview
display_data = []
for i in matches:
display_data.append({'text': i})
self.parent.ids.rv.data = display_data
# ensure the size is okay
if len(matches) <= 10:
self.parent.height = (50 + (len(matches) * 20))
else:
self.parent.height = 240
def keyboard_on_key_down(self, window, keycode, text, modifiers):
if self.suggestion_text and keycode[1] == 'tab':
self.insert_text(self.suggestion_text + ' ')
return True
return super(MyTextInput, self).keyboard_on_key_down(window, keycode, text, modifiers)
class Body(Screen):
def __init__(self, **kwargs):
super(Body, self).__init__(**kwargs)
f = pd.read_csv("stoploss.csv")
fl = len(f.index)
file = pd.DataFrame(f, columns=['Stock Symbol', 'Purchase Price', 'Stock Name', 'Stop Loss(%)'])
j = 0
wl = []
for i in range(fl):
for index in range(1):
columnSeriesObj = file.iloc[:, 2]
# pp = iter(columnSeriesObj.values)
# pp1 = next(pp)
# print(pp1)
wl.append(columnSeriesObj.values[i])
tp = tuple(wl)
print(str(tp))
self.widget_1 = DropDownWidget(pos_hint={'center_x': .5, 'center_y': .5},
size_hint=(None, None), size=(600, 60))
self.widget_1.ids.txt_input.word_list = wl
self.widget_1.ids.txt_input.starting_no = 3
self.add_widget(self.widget_1)
class signin(Screen):
user_name = ObjectProperty(None)
def btn(self):
username = self.user_name.text
print(username)
sm.current = 'option_screen'
class option(Screen):
def btn_addstock(self):
sm.current = 'body_screen'
def btn_stoplosslist(self):
sm.canvas.clear()
sm.current = 'Stoploss_ip'
class stockinput(Screen):
stock_name = ObjectProperty(None)
stock_symbol = ObjectProperty(None)
purchase_price = ObjectProperty(None)
stop_loss = ObjectProperty(None)
def btn(self):
end = datetime.today().date()
start = end.year - 10
start = datetime(start, datetime.today().month, datetime.today().day).date()
uname = input("Enter user name: ")
print("Stock Name:", self.stock_name.text, "Stock Symbol:", self.stock_symbol.text)
print("Purchase Price:",self.purchase_price.text,"Stop Loss(%):",self.stop_loss.text)
#write data to csv file
# if path.exists("stoploss.csv"):
# myFile = open('stoploss.csv', 'a')
# else:
# myFile = open('stoploss.csv', 'w')
file_name = stockinput.uname + "_stoploss.csv"
if path.exists(file_name):
with open(file_name, "a+", newline='')as newFile :
fieldnames = ["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"]
newFileWriter = csv.DictWriter(newFile, fieldnames=fieldnames)
newFileWriter.writerow({"Stock Name" : self.stock_name.text,"Stock Symbol" : self.stock_symbol.text,"Purchase Price" : self.purchase_price.text,"Stop Loss(%)" : self.stop_loss.text})
else:
myFile = open(file_name, 'w+')
myData = [["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"],[self.stock_name.text, self.stock_symbol.text, self.purchase_price.text, self.stop_loss.text]]
with myFile:
writer = csv.writer(myFile)
writer.writerows(myData)
df = web.DataReader(self.stock_symbol.text, 'yahoo', start, end,)
print(df.tail())
self.stock_name.text = ""
self.stock_symbol.text = ""
self.purchase_price.text = ""
self.stop_loss.text = ""
f = pd.read_csv("stoploss.csv")
file = pd.DataFrame(f, columns=['Stock Symbol','Purchase Price','Stock Name','Stop Loss(%)'])
class img(Screen):
def build(self,**kwargs):
super(img, self).__init__(**kwargs)
screen = self
image = Image(source='please_wait.gif')
screen.add_widget(image)
class ListApp(Screen):
# def imgpr(self,**kwargs):
# super(ListApp, self).__init__(**kwargs)
#
# time.sleep(0.1)
# t = threading.Thread(target=imgpr)
# t.start()
def build(self,**kwargs):
super(ListApp, self).__init__(**kwargs)
flag = True
screen = self
# if flag:
#
#
# sm.add_widget(ListApp(name='Stoploss_ip'))
end = datetime(2020, 12, 14)
start = datetime(2020, 12, 14)
btn = Button(text="Back",
font_size="20sp",
background_color=(255/255, 229/255, 204/255, 1),
color=(1, 1, 1, 1),
size=(12, 12),
size_hint=(.1, .05),
pos=(600, 500))
btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))
scroll = ScrollView()
list_view = MDList()
scroll.add_widget(list_view)
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
else:
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],
secondary_text='Close price: ' + str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
print("Something went wrong")
print("Done")
# flag = False
# if flag ==False:
screen.add_widget(scroll)
screen.add_widget(btn)
# return screen
class WindowsManager(ScreenManager):
pass
sm = ScreenManager()
sm.add_widget(signin(name='signin_screen'))
sm.add_widget(option(name='option_screen'))
sm.add_widget(stockinput(name='stockinput_screen'))
sm.add_widget(img(name='image_screen'))
sm.add_widget(ListApp(name='Stoploss_ip'))
sm.add_widget(Body(name='body_screen'))
class run1(MDApp):
def build(self):
return sm
if __name__ == "__main__":
run1().run()
run1.kv 文件
<WindowsManager>:
signin:
option:
stockinput:
ListApp:
Body:
<Body>:
name: 'body_screen'
canvas.before:
Color:
rgba: 188/255, 143/255, 145/255, 1
Rectangle:
pos: self.pos
size: self.size
<DropDownWidget>:
id: DropDownWidget
canvas:
Color:
rgba:(1, 1, 1, 1)
Rectangle:
# pos: self.pos
size: self.size
# orientation: 'vertical'
spacing: 20
txt_input: txt_input
rv: rv
txt_input1: txt_input1
MyTextInput:
id: txt_input1
pos: 400,300
size_hint_y: None
height: 50
MyTextInput:
id: txt_input
hint_text:'Enter here'
size_hint_y: None
height: 50
RV:
id: rv
<MyTextInput>:
id: MyTextInput
readonly: False
multiline: False
<SelectableLabel>:
id: SelectableLabel
# Draw a background to indicate selection
color: 0,0,0,1
canvas.before:
Color:
rgba: (0, 0, 1, .5) if self.selected else (1, 1, 1, 1)
Rectangle:
# pos: self.pos
size: self.size
<RV>:
canvas:
Color:
rgba: 0,0,0,.2
Line:
rectangle: self.x +1 , self.y, self.width - 2, self.height -2
bar_width: 10
scroll_type:['bars']
viewclass: 'SelectableLabel'
SelectableRecycleBoxLayout:
default_size: None, dp(20)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
multiselect: False
<signin>:
canvas.before:
Color:
rgba: 164/255, 66/255, 220/255, 1
Rectangle:
pos: self.pos
size: self.size
name: 'signin_screen'
user_name: user_name
GridLayout:
pos_hint: {'center_x': .75, 'center_y': .15}
row_force_default : True
row_default_height : 50
col_force_default : True
col_default_width : 400
spacing: '15dp'
cols: 1
TextInput:
id: user_name
multiline:False
size_hint: 5.0 ,.1
hint_text: "Email_ID"
Button:
text:"Submit"
font_size: 20
color:0,0,0,1
size_hint: .5 ,.3
background_normal: ''
background_color: (255/255, 153/255, 71/255, 1)
on_press : root.btn()
Label:
text:"Please Do not change the Email_ID. Data will be saved as per your Email_ID"
pos: 180,80
<option>:
canvas.before:
Color:
rgba: 138/255, 104/255, 175/255, 1
Rectangle:
pos: self.pos
size: self.size
name: 'option_screen'
GridLayout:
pos_hint: {'center_x': .83, 'center_y': .18}
row_force_default : True
row_default_height : 100
col_force_default : True
col_default_width : 250
spacing: '20dp'
cols:1
Button:
text:"Add Stock"
color:0,0,0,1
font_size: 18
size_hint: .1 ,.1
pos: 150,150
background_normal: ''
background_color: (204/255, 0, 204/255, 1)
on_press : root.manager.current = 'body_screen'
Button:
text:"Check Stoploss"
color:0,0,0,1
font_size: 18
size_hint: .1 ,.1
pos: 250,120
background_normal: ''
background_color:(127/255, 193/255, 184/255, 1)
on_press : root.manager.current = 'Stoploss_ip'
<stockinput>:
canvas.before:
Color:
rgba: 188/255, 143/255, 145/255, 1
Rectangle:
pos: self.pos
size: self.size
name: 'stockinput_screen'
stock_name: stock_name
stock_symbol: stock_symbol
purchase_price: purchase_price
stop_loss: stop_loss
GridLayout:
pos_hint: {'center_x': .67, 'center_y': .2}
row_force_default : True
row_default_height : 40
col_force_default : True
col_default_width : 250
spacing: '10dp'
cols:2
# pos_hint: {'center_x': .53, 'center_y': .12}
# row_force_default : True
# row_default_height : 30
# col_force_default : True
# col_default_width : 250
# spacing: '20dp'
Label:
text: "Stock Name: "
TextInput:
id: stock_name
multiline:False
Label:
text: "Stock Symbol: "
TextInput:
id: stock_symbol
multiline:False
Label:
text: "Purchase Price: "
TextInput:
id: purchase_price
multiline:False
Label:
text: "Stop Loss(%): "
TextInput:
id: stop_loss
multiline:False
Button:
text:"Submit"
color:102/255, 204/255, 0, 1
font_size:18
background_color: (204/255, 0, 102/255, 1)
on_press: root.btn()
Button:
text:"Back"
color:0,0,0,1
font_size:18
background_normal: ''
background_color: (204/255, 102/255, 0, 1)
on_press: root.manager.current = 'option_screen'
<img>:
name: 'image_screen'
on_enter:root.build()
<ListApp>:
name: 'Stoploss_ip'
on_enter:root.build()
**更新 我尝试在 build() 方法中添加 2 行并显示图像 now.I 认为它预加载图像并将它们保存在缓存中。
class ListApp(Screen):
def build(self):
self.popup = Popup(title='Calculating Stoploss', content=Image(source='please_wait.gif'))
self.profit = ImageLeftWidget(source='profit.jpg')
self.loss = ImageLeftWidget(source='loss.png')
self.popup.open()
# Clock.schedule_once(partial(self.actual_build))
threading.Thread(target=self.actual_build).start()
def actual_build(self):
screen = self
end = datetime.today().date()
start = end
btn = Button(text="Back",
font_size="20sp",
background_color=(255/255, 229/255, 204/255, 1),
color=(1, 1, 1, 1),
size=(12, 12),
size_hint=(.1, .05),
pos=(600, 500))
btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))
scroll = ScrollView()
list_view = MDList()
scroll.add_widget(list_view)
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
else:
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],
secondary_text='Close price: ' + str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
pass
# print("Something went wrong")
print("Done")
# screen.add_widget(screen.scroll)
# screen.add_widget(btn)
Clock.schedule_once(partial(screen.finish_build, scroll, btn))
screen.popup.dismiss()
def finish_build(self, scroll, btn, dt):
screen = self
screen.add_widget(scroll)
screen.add_widget(btn)
由于您是通过使用 on_enter 属性触发 build() 方法，因此您可以使用该方法完成您想要的。
首先，您拨打的是：
super(ListApp, self).__init__(**kwargs)
来自 build() 方法。您不应调用该 super 方法，除非是在 __init__() 方法覆盖内。所以应该删除该行。由于你还没有为ListApp编写__init__()方法，所以没有必要调用super class __init__().
我建议将您的 build() 方法重命名为 actual_build()，如下所示：
def actual_build(self, *args):
并定义一个新的 build() 方法为：
def build(self, **kwargs):
self.popup = Popup(title='Preparing ListApp', content=Image(source='please_wait.gif', anim_delay=0.05))
self.popup.open()
threading.Thread(target=self.actual_build).start()
上述方法显示动画 gif，并启动 actual_build() 方法（以前名为 build()）。
然后，修改actual_build()方法为：
def actual_build(self, *args):
# super(ListApp, self).__init__(**kwargs)
flag = True
screen = self
# if flag:
#
#
# sm.add_widget(ListApp(name='Stoploss_ip'))
end = datetime(2020, 12, 14)
start = datetime(2020, 12, 14)
btn = Button(text="Back",
font_size="20sp",
background_color=(255/255, 229/255, 204/255, 1),
color=(1, 1, 1, 1),
size=(12, 12),
size_hint=(.1, .05),
pos=(600, 500))
btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))
scroll = ScrollView()
list_view = MDList()
scroll.add_widget(list_view)
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
else:
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],
secondary_text='Close price: ' + str(cp1),
tertiary_text='Stoploss: ' + str(sl))
items.add_widget(image)
list_view.add_widget(items)
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
print("Something went wrong")
# flag = False
# if flag ==False:
# screen.add_widget(scroll)
# screen.add_widget(btn)
# schedule the code that must be run on the main thread
Clock.schedule_once(partial(self.finish_build, scroll, btn))
# dismiss the animated gif
self.popup.dismiss()
上面的 actual_build() 方法完成了原始 build() 方法所做的一切，除了对 GUI 的实际更改（必须在主线程上完成）。在此方法结束时，安排对 finish_build() 的调用，并关闭动画 gif Popup。
最后，添加一个 finish_build() 方法来执行实际的 GUI 更改：
def finish_build(self, scroll, btn, dt):
screen = self
screen.add_widget(scroll)
screen.add_widget(btn)
现在我实际上可以 运行 你的代码了，我有一个更新的答案。首先，一些 ListApp 屏幕可以在 kv 文件中构造为：
<ListApp>:
name: 'Stoploss_ip'
on_enter:root.build()
ScrollView:
MDList:
id: list_view
Button:
text: "Back"
font_size: "20sp"
background_color: (255/255, 229/255, 204/255, 1)
color: (1, 1, 1, 1)
size: (12, 12)
size_hint: (.1, .05)
pos: (600, 500)
on_press: root.manager.current = "option_screen"
那么ListApp class可以是：
class ListApp(Screen):
built = BooleanProperty(False)
def build(self):
if self.built:
return
self.built = True
self.popup = Popup(title='Calculating Stoploss', content=Image(source='please_wait.gif'))
self.popup.open()
threading.Thread(target=self.actual_build).start()
def actual_build(self):
end = datetime.today().date()
start = end
i = 0
fl = len(file.index)
try:
for index in range(fl):
for index in range(1):
columnSeriesObj2 = file.iloc[:, 0]
df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)
print(df.head())
Objname = file.iloc[:, 2]
columnSeriesObj = df.iloc[:, 3]
columnSeriesObj1 = file.iloc[:, 1]
ObjStoploss = file.iloc[:, 3]
cp = iter(columnSeriesObj.values)
pp = iter(columnSeriesObj1.values)
pp1 = next(pp)
cp1 = columnSeriesObj.values[0]
sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))
if cp1 <= sl:
Clock.schedule_once(partial(self.add_loss, Objname.values[i], str(cp1), str(sl)))
i=i+1
else:
Clock.schedule_once(partial(self.add_profit, Objname.values[i], str(cp1), str(sl)))
i=i+1
except ConnectionAbortedError:
print("Check your Internet connection")
except ConnectionRefusedError:
print("Check your Internet connection")
except ConnectionError:
print("Check your Internet connection")
except ConnectionResetError:
print("Check your Internet connection")
except TimeoutError:
print("Timeout!!!!...Check your Internet connection")
except KeyError:
pass
except:
pass
# print("Something went wrong")
print("Done")
self.popup.dismiss()
def add_loss(self, name, close_price, stop_loss, dt):
image = ImageLeftWidget(source='loss.png')
items = ThreeLineAvatarIconListItem(text="Alert sale " + name, secondary_text='Close price: '+close_price,
tertiary_text='Stoploss: ' + stop_loss)
items.add_widget(image)
self.ids.list_view.add_widget(items)
def add_profit(self, name, close_price, stop_loss, dt):
image = ImageLeftWidget(source='profit.jpg')
items = ThreeLineAvatarIconListItem(text="Chill " + name,
secondary_text='Close price: ' + close_price,
tertiary_text='Stoploss: ' + stop_loss)
items.add_widget(image)
self.ids.list_view.add_widget(items)
更改的主要项目是列表和后退按钮是在 'kv' 中构建的，列表的项目是使用 Clock.schedule_once() 构建的。不再需要 finish_build() 方法。
另外，请注意我添加了一个 built 属性来跟踪屏幕是否已构建，这样屏幕就不会构建多次。如果多次构建，列表中的项目将被重复添加。