否则是无效语法

Question

我写了一些代码来下载网页然后搜索某个字符串，我知道这是一种低效的方法，但这是我选择的方式，无论如何代码总是会出现无效的语法为了别的。欢迎任何帮助！代码：

import requests
from discord import Webhook, RequestsWebhookAdapter

#download website and turns into a .txt file
while true:
    print('Beginning file download with requests')
    url = str(input("Enter Profile ID:"))
    r = requests.get(url)
    with open('/Users/Computer/Desktop/Notification/[profile.txt', 'wb') as f:
     f.write(r.content)

# Retrieve HTTP meta-data
print(r.status_code)
print(r.headers['content-type'])
print(r.encoding)
#opens text file and searches for a certain keyword
with open('/Users/Computer/Desktop/Notification/[profile.txt') as f:
    if 'avatar-status online profile-avatar-status icon-online' in f.read():#if it finds the keyword it sleeps and then retries
        time.sleep(20)
    continue
#if it doesnt find the keyword (meaning they are offline) it sends you a message through discord webhook
    else:
    webhook = Webhook.from_url("YOUR WEBHOOK HERE!", adapter=RequestsWebhookAdapter())
    webhook.send("Found string")

Answer 1

问题还在继续。您不能在 'if' 之外放置任何其他代码，然后使用 else.

Answer 2

Python 使用缩进作为语法，因此它不能将 'else' 与 if 语句相关联。

尝试缩进 'continue' 和 'else' 之后的行：

with open('/Users/Computer/Desktop/Notification/[profile.txt') as f:
    if 'avatar-status online profile-avatar-status icon-online' in f.read():#if it finds the keyword it sleeps and then retries
        time.sleep(20)
        continue
#if it doesnt find the keyword (meaning they are offline) it sends you a message through discord webhook
    else:
        webhook = Webhook.from_url("YOUR WEBHOOK HERE!", adapter=RequestsWebhookAdapter())
        webhook.send("Found string")

Answer 3

您需要在 True

T

您的 continue 在 while 之外，因为它没有缩进。
您的 continue 在 if 之外，因为它没有缩进，然后断开 else 与 if
你的else正文没有缩进

while True: # Capitalize
    print('Beginning file download with requests')
    url = str(input("Enter Profile ID:"))
    r = requests.get(url)
    with open('/Users/Computer/Desktop/Notification/[profile.txt', 'wb') as f:
        f.write(r.content)

    # Indent everything below this
    print(r.status_code)
    print(r.headers['content-type'])
    print(r.encoding)
    #opens text file and searches for a certain keyword
    with open('/Users/Computer/Desktop/Notification/[profile.txt') as f:
        if 'avatar-status online profile-avatar-status icon-online' in f.read():
            time.sleep(20)
            continue # indent this to align with the sleep
        else:
            webhook = Webhook.from_url("YOUR WEBHOOK HERE!", adapter=RequestsWebhookAdapter()) # indent this to be in the else
            webhook.send("Found string") # indent this too

进一步细化：

您根本不需要那个额外的文件，搜索 r.content 字节字符串
input() returns str() 所以不需要转换
if/else后面没有任何东西，所以你不需要continue

while True:
    print('Beginning file download with requests')
    url = input("Enter Profile ID:")
    r = requests.get(url)
    print(r.status_code)
    print(r.headers['content-type'])
    print(r.encoding)
    if b'avatar-status online profile-avatar-status icon-online' in r.content:
        time.sleep(20)
    else:
        webhook = Webhook.from_url("YOUR WEBHOOK HERE!", adapter=RequestsWebhookAdapter())
        webhook.send("Found string")

否则是无效语法

Else is an invalid syntax

python

if-statement

syntax-error