what is wrong with this line? while (line = workfile.readline ()) != "":

[Simon Brunning]

> From:	erudite [SMTP:ask at me.com]
>     I'm coming from the Java world to the python world which is probably
> why
> I'm a little confused as to why this statement doesn't work:
> 
> while (line = workfile.readline()) != "":
> 
> when I try to run it I get a :
> 
>   File "srns.py", line 38
>     while (line = workfile.readline()) != "":
>                 ^
> SyntaxError: invalid syntax
 
In Python, expressions do not return values. The usual Python idiom for this
is:

while 1:
    line = workfile.readline()
    if not line:
        break
    # Process line

See <http://w1.132.telia.com/~u13208596/guides/readline-performance.htm> for
details.

Cheers,
Simon Brunning
TriSystems Ltd.
sbrunning at trisystems.co.uk




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