Newbie Questions: Swithing from Perl to Python

[Mark Roach]

On Sun, 26 Oct 2003 02:14:19 +0000, Luther Barnum wrote:
[...]
> Here is  another example:
> 
> ex:
> 
> While(<FILE>) {
>     chomp;
>     if(/(\w+    # Date
>     \s+          # Space
>     \d+         # Day
>     \s+          # Space
>     (\w+)         # Server
>     \s+          # Space
>     (\w+)/x) {  # Error
> 
>         $server = $1;
>         $error = $2;
> 
>         $server_totals{$server}++;
>         $error_totals{$error}++;
>     }
> }

Whew, I remember now why I ran away from perl fairly quickly. Can you
explain what the above code does? I can see that it iterates over a file
and that somehow it extracts a server name and an error, but I have no idea
what all the strange variables are... I am guessing that is a regex?

If what you are describing is reading from a file formatted like:
2003/10/25 Sat Servername Error10

then something like this might be what you are looking for:

server_totals = {}
error_totals = {}
for line in file('/path/to/logfile'):
    line = line.strip()
    date, day, server, error = line.split()
    server_totals[server] = server_totals.get(server, 0) + 1
    error_totals[error] = error_totals.get(error, 0) + 1

-Mark