Function lookup using a directory.

[andy.pevy at nokia.com]

Hi Ype

Ype Kingma <ykingma at accessforall.nl> wrote:
> Andy,

> In addition to the earlier replies:

> Your run() method seems to be checking for
> presence of arguments, so you might
> consider defining it with an extra '*' as:

> class Help0:
>     def run(self, *which):
>         if len(which) == 1:
>             print 'Help no args'
>         else:
>             print 'Help args'

> This will give you a tuple with the passed arguments,
> in your case an empty tuple.

The argument passed to thee run method is a list, so does this still necessary ??.


> Have fun,
> Ype


> andy.pevy at nokia.com wrote:
>> 
>> Hi Guys
>> 
>>         I am having trouble with the directory data type. What I want to
>> do is to set up a directory that I can use to parse a command entered by
>> the user, and have a directory return the name of a class to handle the
>> command.  Like this :-
>> 
>> command_table = {'0':    'Help0',
>>             '1':    'Help1',
>>             '2':    'Help2',
>>             '3':    'Help3' }
>> 
>> class Help0:
>> 
>>     def run(self,which):
>>         if len(which) == 1:
>>             print 'Help no args'
>>         else:
>>             print 'Help args'
>> 
> [snip]
>> 
>> if __name__ == '__main__':
>> 
>>     command = user_input()
>> 
>>     try:
>>         h = command_table[command[0]]
>>     except:
>>         print command[0]+' not found'
>> 
>>     h.run()     # Call the run method of the selected class.
>> 


> -- 
> email at xs4all.nl

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