Re: [Newbie] Referring to a global variable inside a function
Ernesto García García wrote:
Hi experts,
I've built a class for parsing a user-defined list of files and matching
lines with a user-defined list of regular expressions. It looks like this:
(snip code)
But then, when I try to use my class using actions with memory it will
fail:
code
import LineMatcher
global count
count = 0
def line_action(line, match_dictionary):
count = count + 1
(snip)
/code
The error is:
console
(snip)
UnboundLocalError: local variable 'count' referenced before assignment
/console
How would you do this?
FWIW, I would *not* use a global.
class LineAction(object):
def __init__(self):
self.count = 0
def __call__(self, line, match_dictionary):
self.count +=1
line_action = LineAction()
line_matcher = LineMatcher.LineMatcher()
line_matcher.add_files('*')
line_matcher.add_action(r'(?Pline.*)', line_action)
line_matcher.go()
HTH
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: [Newbie] Referring to a global variable inside a function
Ernesto García García wrote:
But then, when I try to use my class using actions with memory it will
fail:
code
import LineMatcher
global count
count = 0
def line_action(line, match_dictionary):
count = count + 1
line_matcher = LineMatcher.LineMatcher()
line_matcher.add_files('*')
line_matcher.add_action(r'(?Pline.*)', line_action)
line_matcher.go()
/code
The error is:
console
Traceback (most recent call last):
File Test.py, line 12, in ?
line_matcher.go()
File LineMatcher.py, line 21, in go
action(line, match.groupdict())
File Test.py, line 7, in line_action
count = count + 1
UnboundLocalError: local variable 'count' referenced before assignment
/console
How would you do this?
def line_action(line, match_dictionary):
global count # make it a module-global variable, not a function-local
count = count + 1
/F
--
http://mail.python.org/mailman/listinfo/python-list
Re: [Newbie] Referring to a global variable inside a function
How would you do this? def line_action(line, match_dictionary): global count # make it a module-global variable, not a function-local count = count + 1 /F OK, I had put it on the global block. Thanks, Ernesto -- http://mail.python.org/mailman/listinfo/python-list
