re module methods: flags(), pattern()

[André Søreng]

A flag is just an int. From the re doc, you can see
there is a ignorecase flag:

"
I
IGNORECASE
     Perform case-insensitive matching; expressions like [A-Z] will 
match lowercase letters, too. This is not affected by the current locale.
"

Using the ignorecase flag:

 >>> import re
 >>> print re.I
2
 >>> print re.IGNORECASE
2
 >>> r = re.compile("hello", re.IGNORECASE)
 >>> print r.pattern
'hello'
 >>> match = r.search("heLLo")
 >>> match.group()
'heLLo'

As the doc says, you can combine several flags with the '|' operator:
r = re.compile("your_regexp", re.SOMEFLAG|re.SOMEOTHERFLAG)


Xah Lee wrote:
> Python re module has methods flags and pattern. How to use these
> exactly?
> 
> e.g. i tried
> 
> print patternObj.flags()
> 
> and the error is some "int object is not callable".
> 
> newpattern=re.compile(ur'\w+',patternObj.flags())
> 
> also bad.
> 
> similar error for patternObj.pattern(). (and i suppose the same for
> groupindex() )
> 
> thanks.
> 
>  Xah
>  xah at xahlee.org
> ∑ http://xahlee.org/
>