Python AttributeError: 'str' object has no attribute 'get_price'

Question

我正在尝试从 main.py 获取用户输入，然后根据所述用户输入调整输出。我不仅收到此错误，而且当我开始 main.py 时，我的 runAnalytics 似乎是运行，而不是当我按下我的按钮命令时。

main.py

import runAnalytics
import tkinter
import os
import centerWindow

loadApplication = tkinter.Tk()
loadApplication.title("Stock Analytics")
loadApplication.geometry("1080x720")

label1 = tkinter.Label(loadApplication, text = "Ticker")
input1 = tkinter.Entry(loadApplication)

loadAnalytics = tkinter.Button(loadApplication, text = "Load Analytics", command = runAnalytics.run(input1))

centerWindow.center(loadApplication)

loadAnalytics.pack()
label1.pack()
input1.pack()

loadApplication.mainloop()

runAnalytics.py

from yahoo_finance import Share
import tkinter
import os
import centerWindow

def run(input1):
    ticker = Share(input1)
    loadAnalytics = tkinter.Tk()
    loadAnalytics.title("$" + ticker + " Data")
    loadAnalytics.geometry("1080x720")

    print ("Price per share: " + ticker.get_price())

    ticker.refresh()
    print ("Price per share: " + ticker.get_price())

    print("The dividend yield is: " + ticker.get_dividend_yield())

    print("The 52 week low is: " + ticker.get_year_low())
    print("The 52 week high is: " + ticker.get_year_high())
    print("The volume is: " + ticker.get_volume())

    print("The previous close was: " + ticker.get_prev_close())
    print("The previous open was: " + ticker.get_open())

    loadAnalytics.mainloop()

错误信息：

Traceback (most recent call last): File "C:\Users\MyName\Documents\Python Projects\MarketData\main.py", line 13, in loadAnalytics = tkinter.Button(loadApplication, text = "Load Analytics", command = runAnalytics.run(input1)) File "C:\Users\MyName\Documents\Python Projects\MarketData\runAnalytics.py", line 12, in run print ("Price per share: " + ticker.get_price()) AttributeError: 'str' object has no attribute 'get_price'

Answer 1

您假设 runAnalytics 是运行是正确的，因为按照您的方式将函数绑定到按钮时执行该函数。

根据 effbot docs，您需要使用 lambda 函数才能将具有传递参数的函数绑定到按钮，如下所示：

import tkinter

def test_func(val):
    print(type(val))
    print(val)
    share_id = val.get()
    print(share_id)


loadApplication = tkinter.Tk()
loadApplication.title("Stock Analytics")
loadApplication.geometry("1080x720")

label1 = tkinter.Label(loadApplication, text = "Ticker")
input1 = tkinter.Entry(loadApplication)

loadAnalytics = tkinter.Button(loadApplication, text="Load Analytics", command=lambda: test_func(input1))


loadAnalytics.pack()
label1.pack()
input1.pack()

loadApplication.mainloop()

但是，还有第二件事要记住：

input1 = tkinter.Entry(loadApplication)

创建一个名为 input1 的 Entry 小部件，然后将其传递给该函数。问题是 input1 不包含您在条目小部件中键入的字符串，而是包含对小部件的引用（小部件 ID）。为了获取小部件的内容，您需要调用其 .get() 方法，如我的代码片段所示。

Python AttributeError: 'str' object has no attribute 'get_price'

Python AttributeError: 'str' object has no attribute 'get_price'

python

string

tkinter

attributeerror

python-3.5