looping through a file

[Bruno Desthuilliers]

Adam wrote:
> Psybar Phreak wrote:
> 
>> hi all - ive just started with python (after having done java and c) 
>> and am
>> having a little bit of trouble with the script.  Im using as a login 
>> script.
>>
>> There's a users.dat file in the format
>> user1
>> user1password
>> user2
>> user2password
>> ... etc
>>
>> at the moment - the code i work, only checks the first and second 
>> lines (ie.
>> details of user1).  but it appears that python doesn't have a do... 
>> while...
>> until loop.
>>

No, but there are better ways to do it in Python :

try:
     thefile = file(filename)
except IOError:
     doWhatEverWithException()

for line in thefile.readlines():
     doWhatEverWithTheLine()