To the OP,
I suggest if you haven't yet Kodos, to get it here
http://kodos.sourceforge.net/.
It's a python regexp debugger, a lifetime saver.
Jean-Michel
John S wrote:
On Jun 11, 10:30 pm, meryl <silverburgh.me...@gmail.com> wrote:
Hi,
I have this regular expression
blockRE = re.compile(".*RenderBlock {\w+}")
it works if my source is "RenderBlock {CENTER}".
But I want it to work with
1. RenderTable {TABLE}
So i change the regexp to re.compile(".*Render[Block|Table] {\w+}"),
but that breaks everything
2. RenderBlock (CENTER)
So I change the regexp to re.compile(".*RenderBlock {|\(\w+}|\)"),
that also breaks everything
Can you please tell me how to change my reg exp so that I can support
all 3 cases:
RenderTable {TABLE}
RenderBlock (CENTER)
RenderBlock {CENTER}
Thank you.
Short answer:
r = re.compile(r"Render(?:Block|Table)\s+[({](?:TABLE|CENTER)[})]")
s = """
blah blah blah
blah blah blah RenderBlock {CENTER} blah blah RenderBlock {CENTER}
blah blah blah RenderTable {TABLE} blah blah RenderBlock (CENTER)
blah blah blah
"""
print r.findall(s)
output:
['RenderBlock {CENTER}', 'RenderBlock {CENTER}', 'RenderTable
{TABLE}', 'RenderBlock (CENTER)']
Note that [] only encloses characters, not strings; [foo|bar] matches
'f','o','|','b','a', or 'r', not "foo" or "bar".
Use (foo|bar) to match "foo" or "bar"; (?xxx) matches xxx without
making a backreference (i.e., without capturing text).
HTH
-- John Strickler
--
http://mail.python.org/mailman/listinfo/python-list
