Florian Lindner wrote:
> Hello,
> I have a little problem with the global statement.
>
> def executeSQL(sql, *args):
> try:
> import pdb; pdb.set_trace()
> cursor = db.cursor() # db is <type 'NoneType'>.
> [...]
> except:
> print "Problem contacting MySQL database. Please contact root."
> sys.exit(-1)
>
>
> db = None # Global Variable for DB connection
>
> def main():
> [...]
> global db
> db = MySQLdb.connect(...)
> [...]
> executeSQL(sql, args)
>
>
> Why isn't the global variable db not written in main() to be a mysql
> connection and still none type in executeSQL?
>
> Thanks,
>
> Florian
Because you have it to let executeSQL know that it is global or it creates a
local copy in local namespace.
def executeSQL(sql, *args):
global db
try:
import pdb; pdb.set_trace()
cursor = db.cursor() # db is <type 'NoneType'>.
[...]
except:
print "Problem contacting MySQL database. Please contact root."
sys.exit(-1)
-Larry
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