match trailing slash with Python regex

问题:

I try to match a trailing / like this:

type(re.match('/$', u'https://x.x.x/')) <type 'NoneType'> 

However, this one does match:

type(re.match('.*/$', u'https://x.x.x/')) <type '_sre.SRE_Match'> 

Using Perl the first pattern does match:

perl -e 'print "true" if "https://example.org/" =~ /\/$/' 

How can this behavior be explained?

回答1:

re.match search your pattern from beginning of you string. Since your string doesn't start with a '/', re.match('/$', u'https://x.x.x/') returns nothing.

You need to use re.search('/$', u'https://x.x.x/') to find your last slash.

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