为什么在函数外时pylint需要大写的变量名？

2024-04-05 18:28:31

为什么pylint在函数外部时接受大写变量,而在函数内部拒绝它们？相反,为什么pylint拒绝camelCase ouside函数并在函数内部接受它？

我刚刚安装了pylint(版本2.2.2)来检查我的Python3.一定错过了某些东西.我相关的Python /软件包版本是：

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)]

考虑下面的代码(test_1),其中我使用camelCase和大写的变量命名.大写的变量被接受(为什么？)而骆驼的情况被拒绝(我想是因为代码没有包装到函数中).

'''
Nothing important
'''

fileHandler = open("afile.txt")

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

哪个调用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中(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()

然后将大写变量检测为不合规(这是我所期望的)：

$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)

我有一些不清楚的地方…欢迎澄清…

最好

解决方法:

当您将变量放在函数内部时,pylint不再“将其视为”常量.在将变量放入函数内部之后,pylint将它们“视为”正常变量,不再需要大写它们,而是需要“ snake_case”.注意,默认情况下,pylint首选使用snake_case而不是camelCase,但是您可以在.pylintrc中使用override this来首选camelCase.

Python脚本(无方法)

#!/usr/bin/env python3

# pylint wants 'FILEHANDLER'
fileHandler = open("afile.txt") # <-- pylint sees constant, wants UPPER_CASE 

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

用方法

#!/usr/bin/env python3

def run_stuff():

    # pylint wants 'file_handler'
    fileHandler = open("afile.txt") # <-- pylint sees normal variable

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

if __name__ == '__main__':
    run_stuff()

通常,.pylintrc文件将跟随PEP8.如果未提供任何文件,则它将默认为PEP8(如pylint website所述).

码农公寓