Comparison problem

[bonono at gmail.com]

I think no matter what language you programs it, it is hard to
understand. Can you break it up into sub-problems first ? Like first
parsing the inventory file into a python dict, then also the fields
from web to another dict ?

Chris wrote:
> Hi,
>
> I'm new to python, and I'm trying to write a small python script for a
> webpage.  The script opens up a file called inventory, reads the
> contents, and checks the contents against the data from the form in my
> webpage.  Now I have to do some slicing to get the name of the form
> elements (in this case, checkboxes), to resemble the values in the
> inventory file.  Here's my python part:
>
> #!/usr/local/bin/python
> import cgi
> import types
> from Cookie import *
> form=cgi.FieldStorage()
> user_answer=[]
> error='false'
> item=''
> qty=''
> def main():
>   print"Content-type: text/html\n"
>   i=open("inventory","r")
>   keys=form.keys()
>   for key in keys:
>    field=form[key]
>    if type(field)==types.InstanceType:
>     item=field.value
>     if item[0:1]=="-":
>      item=item[ :-7]
>      item=item[1:]
>      infile=open("inventory","r")
>      while infile:
>       dummy=infile.readline()
>       if dummy=='':break
>       print item
>       print ", "+dummy
>       if (dummy == item): <This comparison isn't working>
>        print"Found it"
>       else:
>        print"Didn\'t Find it"
>       print "<br>"
>      infile.close()
>     else:
>      #print"	Quantity: "
>      #print item
>      print"<br>"
>     #print field.value
>    else:
>     print"BAD"
> main()
>
> Let me know if more information is needed.  Any assistance will be
> greatly appreciated.