待处理:
>>> re.findall(r'[-+]*\d+(?:\.\d+)?','-++++---+123.012')
['-++++---+123.012']
>>> re.findall(r'[-+]*\d+(\.\d+)?','-++++---+123.012')
['.012']
待处理:
>>> re.findall(r'[-+]*\d+(?:\.\d+)?','-++++---+123.012')
['-++++---+123.012']
>>> re.findall(r'[-+]*\d+(\.\d+)?','-++++---+123.012')
['.012']