Python 捕获警告

警告不是异常

?捕获警告的三种方法

? 方法一

import?warnings
warnings.filterwarnings('error')????

try:
????warnings.warn("deprecated",?DeprecationWarning)
except?Warning?as?e:
????print(e)

? 方法二

import?warnings

try:
????warnings.warn("deprecated",?DeprecationWarning)
except?Warning?as?e:
????print(e)

$?python3?-W?error?demo.py
deprecated

? 方法三

import?warnings

def?do_warning():
????warnings.warn("deprecated",?DeprecationWarning)

with?warnings.catch_warnings(record=True)?as?w:
????do_warning()
????if?len(w)?>0:
????????print(w[0].message)