@NotNull, @Nullable (oleh jetbrains) dalam Java: https://www.jetbrains.com/hel...
Ia boleh dilaksanakan menggunakan penghias dalam Python, tetapi tiada kawalan terperinci ditemui: https://www.google.com/search...
Berharap dapat menyediakan sejenis kawalan halus, iaitu: kawalan khusus bagi setiap parameter
Saya hanya ingin menyemak penunjuk nol, tiada had jenis diperlukan
Penulisan manual, membosankan
def func(param1, param2, param3):
# 明確表示, 不接受空指針(這里寫法很繁瑣, 是否有簡化方法?)
if not ((param1 is not None) and (param2 is not None) and (param3 is not None)):
raise TypeError('%s or %s or %s is None' % (param1, param2, param3))
# 正常函數(shù)邏輯
裝飾器的寫法(未實現(xiàn))
@not_null(param1, param2)
def func(param1, param2, param3, *args, **kw):Python 3.5
2
0
0
from functools import wraps
def allow_jsonp(fun):
@wraps(fun)
def wrapper_fun(*args, **kwargs):
for a in args:
if not a:
return 'args is null'
return fun(*args, **kwargs)
return wrapper_fun
@allow_jsonp
def a(a):
print (111111111)
print (a(0))
from functools import wraps
def not_none(func):
@wraps(func)
def wrapper(*args, **kwargs):
if (None in args) or (None in kwargs.values()):
raise ValueError('Arguments must be not None')
else:
return func(*args, **kwargs)
return wrapper
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