为什么 pylint 在函数外部时需要大写的变量名? [英] Why does pylint require capitalized variable names when outside a function?

问题描述

为什么pylint在函数外部接受大写变量而在函数内部拒绝它们?反之，为什么 pylint 拒绝函数外的camelCase而在函数内部接受它?

Why does pylint accept capitalized variables when outside a function and reject them inside a function? Conversely, why does pylint reject camelCase ouside a function and accept it inside a function?

我刚刚安装了 pylint(版本 2.2.2)来检查我的 Python 3.一定有我遗漏的地方.我的相关 Python/包版本是:

I just installed pylint (version 2.2.2) to check my Python 3. There must be something that I missed. My relevant Python/package versions are:

pylint 2.2.2
astroid 2.1.0
Python 3.6.7 | packaged by conda-forge | (default, Nov 20 2018, 18:20:05)
[GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.37)]

考虑以下代码 (test_1)，其中我使用驼峰命名法和大写字母命名的变量.接受大写变量(为什么?)并拒绝驼峰式命名(因为代码没有包装到函数中，我猜).

Consider the following code (test_1) where I'm using camelCase and Capitalized named for variables. The Capitalized variable are accepted (why ?) and camelCase rejected (because the code is not wrapped into a function, I guess).

'''
Nothing important
'''

fileHandler = open("afile.txt")

for line in fileHandler:
    Token = line.split("\t")
    Part_1 = Token[0]
    print(Part_1)

调用 pylint 时给出:

Which give upon calling pylint:

$ pylint --py3k --enable=all  test_1.py 
************* Module test_1
test_1.py:5:0: C0103: Constant name "fileHandler" doesn't conform to UPPER_CASE naming style (invalid-name)

------------------------------------------------------------------
Your code has been rated at 8.00/10 (previous run: 8.00/10, +0.00)

现在，如果我将所有内容都放入一个函数 (test_2) 中.

Now if I put everything into a function (test_2).

'''
Nothing important
'''

def foo():
    fileHandler = open("afile.txt")

    for line in fileHandler:
        Token = line.split("\t")
        Part_1 = Token[0]
        print(Part_1)

if __name__ == '__main__':
    foo()

然后大写变量被检测为不合规(这是我所期望的):

Then the capitalized variable are detected as non compliant (which is what I expected) :

$ pylint --py3k --enable=all  test_2.py
************* Module test_2
test_2.py:5:0: C0102: Black listed name "foo" (blacklisted-name)
test_2.py:5:0: C0111: Missing function docstring (missing-docstring)
test_2.py:6:4: C0103: Variable name "fileHandler" doesn't conform to snake_case naming style (invalid-name)
test_2.py:9:8: C0103: Variable name "Token" doesn't conform to snake_case naming style (invalid-name)
test_2.py:10:8: C0103: Variable name "Part_1" doesn't conform to snake_case naming style (invalid-name)

------------------------------------------------------------------
Your code has been rated at 3.75/10 (previous run: 3.75/10, +0.00)

我有不清楚的地方...欢迎澄清...

There is something unclear for me... Any clarification welcome...

最佳

推荐答案

对于在 for 循环中接受的大写变量(即以大写字母开头，例如 Token, Part_1)的情况感到困惑(请参阅 test_1)虽然他们应该被拒绝.我在github上发布了一个问题.这个问题揭示了 pylint 中的一个错误.https://github.com/PyCQA/pylint/issues/2695

I was puzzled regarding the case of capitalized variables (i.e starting with an uppercase letter, e.g. Token, Part_1) that were accepted in the for loops (see test_1) while they should have been rejected. I have posted an issue in github. This issue revealed a bug in pylint. https://github.com/PyCQA/pylint/issues/2695

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