Regular Expression

[Pippo]

On Sunday, 12 April 2015 19:28:44 UTC-4, MRAB  wrote:
> On 2015-04-12 23:49, Pippo wrote:
> > I have a text as follows:
> >
> > "#D{#C[Health] #P[Information] -
> > means any information, including #ST[genetic information],
> > whether #C[oral | (recorded in (any form | medium))], that
> > (1)#C[Is created or received by] a
> > #A[health care provider | health plan | public health authority | employer | life insurer | school | university | or health care clearinghouse];
> > (2)#C[Relates to] #C[the past, present, or future physical | mental health | condition of an individual] |
> > #C[the provision of health care to an individual] |
> > #C[the past, present, or future payment for the provision of health care to an individual].}"
> >
> > I want to get all elements that start with #C and are []  and put it in an array. For example #C[Health], I try with regex but it doesn't work:
> >
> "... it doesn't work"? In what way doesn't it work?
> 
> > import re
> > import tkinter.filedialog
> > import readfile
> >
> >
> >
> > j = 0
> >
> > text = [ ]
> >
> >
> > content = readfile.pattread()
> >
> > while j < len(content):
> >
> There's a syntax error here:
> 
> >      constraint = re.compile(r'(#C\[\w*\]'))
> >      result = constraint.search(content[j],re.MULTILINE)
> >      text.append(result)
> >      print(text)
> >      j = j+1
> >

result is empty! Although it should have a content.

What is the syntax error?