python flask alchemy在判断None值时与flake8格式检测冲突

python flask alchemy 在判断None值时候,推荐使用==/!=来判断。例如:

 query.filter(User.name==None)
 query.filter(User.name!=None)

但是这样的代码提交后时过不了flake8的语法检查,会报错:

flake8...................................................................Failed
- hook id: flake8
- exit code: 1

app/mode/xxx.py:393:74: E711 comparison to None should be 'if cond is None:'
app/models/xxx.py:409:74: E711 comparison to None should be 'if cond is None:'
app/models/xxx.py:442:70: E711 comparison to None should be 'if cond is None:'

alchemy中,要是使用is/is not来判断None值得不到想要的结果

  query.filter(User.name  is None)
 query.filter(User.name is not None)

但是我们可以这样写,既可以得到想要的结果,也可以通过flask8检查

  query.filter(User.name.is_(None))
 query.filter(User.name.isnot(None))

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