[英]Substring in Python, what is wrong here?
我正在嘗試在Python中模擬子字符串,但出現錯誤:
length_message = len(update)
if length_message > 140:
length_url = len(short['url'])
count_message = 140 - length_url
update = update["msg"][0:count_message] # Substring update variable
print update
return 0
錯誤如下:
Traceback (most recent call last):
File "C:\Users\anlopes\workspace\redes_sociais\src\twitterC.py", line 54, in <module>
x.updateTwitterStatus({"url": "http://xxx.com/?cat=49s", "msg": "Searching for some ....... tips?fffffffffffffffffffffffffffffdddddddddddddddddddddddddddddssssssssssssssssssssssssssssssssssssssssssssssssssseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeedddddddddddddddddddddddddddddddddddddddddddddddfffffffffffffffffffffffffffffffffffffffffffff "})
File "C:\Users\anlopes\workspace\redes_sociais\src\twitterC.py", line 35, in updateTwitterStatus
update = update["msg"][0:count_message]
TypeError: string indices must be integers
我做不到
update = update["msg"][0:count_message]
變量“ count_message”返回“ 120”
給我點暗示。
最好的祝福,
我打這個電話,update [“ msg”]來自這里
x = TwitterC()
x.updateTwitterStatus({"url": "http://xxxx.com/?cat=49", "msg": "Searching for some ...... ....?fffffffffffffffffffffffffffffdddddddddddddddddddddddddddddssssssssssssssssssssssssssssssssssssssssssssssssssseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeedddddddddddddddddddddddddddddddddddddddddddddddfffffffffffffffffffffffffffffffffffffffffffffddddddddddddddddd"})
您是否多次遍歷此代碼?
如果是這樣,也許第一次通過update
就是字典,並且update["msg"]
返回一個字符串。 精細。
但是您將update
設置為等於結果:
update = update["msg"][0:int(count_message)]
(大概是)一個字符串。
如果要循環,則下次執行循環時將出現錯誤,因為現在update
是字符串而不是dict
(因此, update["msg"]
不再有意義)。
您可以通過在錯誤之前放入打印語句來調試此錯誤:
print(type(update))
或者,如果不是太大,
print(repr(update))
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