[Tutor] "=" invalid syntax ?

[Tim Johnson]

* Xuer <linuxasking at netscape.net> [040130 21:19]:
> print all lines of a simple file
> 
> test.py
> -----------------------------------------------
> #!/usr/bin/python
> 
> try:
>        fi = open('test.py', 'r')
> except IOError:
>        print 'Can\'t open file for reading.'
>        sys.exit(0)
> while (line=fi.readline()):
>        print line
> -----------------------------------------------
> then run it
> 
> $./test.py
>  File "./test.py", line 8
>    while (line=fi.readline()):
>               ^
> SyntaxError: invalid syntax
> 
> what's the problem?
> while (line=fi.readline()):
 
    '=' is an assignment operator in python.
    '==' is the comparison operator in python.
    use '=='

    happens to me all the time ....
    tim

-- 
Tim Johnson <tim at johnsons-web.com>
      http://www.alaska-internet-solutions.com