在替换字符串中的模式时,
我特别需要匹配命名组的整数/长值.
案例和我尝试过的案例:
status = {1:'foo', 23:'bar'}
re.sub(
'<status>(?P<id>\d+)',
status.get(int(r'\g<id>')), # ValueError: invalid literal for int() with base 10: '\\g<id>'
# status.get(int(r'\g<id>'.decode())), # ValueError: invalid literal for int() with base 10: '\\g<id>'
# status.get('%d' % r'\g<id>'), # %d format: a number is required, not str
'Tom ran: from <status>1 to <status>23')
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正常铸造适用于原始弦,int(r'22')但它在上面不起作用?
这应该适合你:
re.sub(
'<status>(?P<id>\d+)',
lambda m: status.get(int(m.group('id'))),
'Tom ran: from <status>1 to <status>23')
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如果repl是一个函数,则会为每个非重叠的模式调用调用它.该函数接受单个匹配对象参数,并返回替换字符串.@ http://docs.python.org/library/re.html#re.sub