python: flake8 找不到不存在的方法

Question

如果我这样做：

new_list = []
new_list.foo()

flake8 不会 return foo() 方法的错误，因为它不是 'list' 方法。

这是正常现象还是我需要配置什么？

Answer 1

flake8 不处理问题，但 PyLint 处理 - 发出 no-member 警告：

$ pylint test.py
No config file found, using default configuration
************* Module test
C:  1, 0: Missing module docstring (missing-docstring)
C:  1, 0: Invalid constant name "new_list" (invalid-name)
E:  2, 0: Instance of 'list' has no 'foo' member (no-member)

而且，built-in to PyCharm code analyzer 也会警告未解析的属性：

Answer 2

Flake8 is a wrapper around these tools:

PyFlakes

pep8

Ned Batchelder’s McCabe script

PyFlakes 是您可能希望检测到此类错误的部分。但是它检测的很少，它解释了为什么：

Pyflakes is also faster than Pylint or Pychecker. This is largely because Pyflakes only examines the syntax tree of each file individually. As a consequence, Pyflakes is more limited in the types of things it can check.

flake8 文档列出了 Pyflakes 提供的错误代码：

code    sample message
F401    module imported but unused
F402    import module from line N shadowed by loop variable
F403    ‘from module import *’ used; unable to detect undefined names
F404    future import(s) name after other statements
F811    redefinition of unused name from line N
F812    list comprehension redefines name from line N
F821    undefined name name
F822    undefined name name in __all__
F823    local variable name ... referenced before assignment
F831    duplicate argument name in function definition
F841    local variable name is assigned to but never used

我支持 PyCharm 的建议，其次是 PyLint。

python: flake8 找不到不存在的方法

python: flake8 cannot find non exising method

python

flake8