Python regular expression to remove parentheses and square brackets in a string

Experience: the role of \ in regular expressions-for example:
a single dot in the regular represents any character. When we want to match the dot, we need to use \, that is, pass'\.' to the regular expression to escape , Otherwise, an error will occur.

# 针对括号（全/半角）
string  = "本实用新型公开了全自动套鞋机，在机架（1）内安装鞋套弹性进给装置构成套鞋机，在机架（1）的中间安装滑杆（2）"
res= re.sub(u"\\（.*?\\）|\\{.*?}|\\［.*?］", '', string  )	# 全角字符
# name = re.sub(u"\\(.*?\\)|\\{.*?}|\\[.*?]", '', str)	# 半角字符
print(res)