UnboundLocalError：分配前引用的局部变量“Counter”答案

【问题标题】：UnboundLocalError: local variable 'Counter' referenced before assignmentUnboundLocalError：分配前引用的局部变量“Counter”
【发布时间】：2019-01-24 03:12:53
【问题描述】：

这是我的代码

    #word count2
from collections import Counter
def main():
    with open("search words.txt","r") as myfile:
         data=myfile.read()
         topTenWords(data)


def topTenWords(wordCountDict):
    split_it=wordCountDict.split()
    Counter = Counter(split_it)
    most_common=Counter.most_common(10)
    print(most_common)

if __name__=='__main__':
  main()

然后在运行上面的代码我得到错误

word count2.py 
Traceback (most recent call last):
  File "D:/word count2.py", line 16, in <module>
    main()
  File "D:/word count2.py", line 6, in main
    topTenWords(data)
  File "D:/word count2.py", line 11, in topTenWords
    Counter = Counter(split_it)
UnboundLocalError: local variable 'Counter' referenced before assignment

上面的代码有什么错误？

【问题讨论】：

你会把Counter = Counter(split_it)改成counter = Counter(split_it)，同时把Counter.most_common(10)改成counter.most_common(10)

标签： python string file

【解决方案1】：

您正在用变量覆盖导入的 Counter 类。只需写例如counter = Counter(split_it)，它应该可以工作。

顺便说一句，您可能想阅读 Python 的 PEP8 样式指南，通常您不使用以大写字母开头的变量名。

【讨论】：

【解决方案2】：

这应该可行：

# coding:utf-8
from collections import Counter


def main():
    with open("../docs/words.txt", "r") as myfile:
        data = myfile.read()
        topTenWords(data)
def topTenWords(wordCountDict):
    split_it = wordCountDict.split()
    counter = Counter(split_it)
    most_common = counter.most_common(10)
    print(most_common)


if __name__ == '__main__':
    main()

【讨论】：