Python 正则表达式匹配数字及字符串中的纯数字

import reprice='25.34-34.55'test=re.compile(r'[1-9]/d*/./d*|0/./d*[1-9]|[1-9]/d*').findall(price)[0]test2=re.compile(r'-[1-9]/d*/./d*|-0/./d*[1-9]|-[1-9]/d*').findall(price)[0]i=float(test)x=-float(test2)r=(x+i)/2print r

>>> import re>>> re.findall(r'/d+', 'hello 42 I'm a 32 string 30')['42', '32', '30']

>>> re.findall(r'/d+', "hello 42 I'm a 32 str12312ing 30")['42', '32', '12312', '30']

>>> re.findall(r'/b/d+/b', "hello 42 I'm a 32 str12312ing 30")['42', '32', '30']>>> re.findall(r'/b/d+/b', "hello,42 I'm a 32 str12312ing 30")['42', '32', '30']>>> re.findall(r'/b/d+/b', "hello,42 I'm a 32 str 12312ing 30")['42', '32', '30']