关于inspect模块（Python）

import inspect

def foo(a, b=2, *,c, d=10,**kw):
    pass

sig = inspect.signature(foo)
print(sig)
print(type(sig))
for name,param in sig.parameters.items():
    print(name,'%s:'%param, param.kind)
    print(str(param.kind) == 'KEYWORD_ONLY')
    print(name,'%s:'%param, param.empty)
    print(name,'%s:'%param, param.default)

结果：

(a, b=2, *, c, d=10, **kw)
<class 'inspect.Signature'>
a a: POSITIONAL_OR_KEYWORD
False
a a: <class 'inspect._empty'>
a a: <class 'inspect._empty'>
b b=2: POSITIONAL_OR_KEYWORD
False
b b=2: <class 'inspect._empty'>
b b=2: 2
c c: KEYWORD_ONLY
True
c c: <class 'inspect._empty'>
c c: <class 'inspect._empty'>
d d=10: KEYWORD_ONLY
True
d d=10: <class 'inspect._empty'>
d d=10: 10
kw **kw: VAR_KEYWORD
False
kw **kw: <class 'inspect._empty'>
kw **kw: <class 'inspect._empty'>