String/Number Conversion

[josh logan]

On Sep 6, 5:04 pm, Andreas Hofmann <asdfasdfasdfasdfa... at arcor.de>
wrote:
> Hello Folks!
>
> I've got a little problem here, which which really creeps me out at the
> moment.
> I've got some strings, which only contain numbers plus eventually one
> character as si-postfix (k for kilo, m for mega, g for giga). I'm trying
> to convert those strings to integers, with this function:
>
> def eliminate_postfix(value):
>          if type(value) is str:
>                  value.upper()
>                  if value.endswith('K'):
>                          mult = 1000
>                  elif value.endswith('M'):
>                          mult = 1000000
>                  elif value.endswith('G'):
>                          mult = 1000000000
>                  else:
>                          mult = 1
>
>                  if mult is 1:
>                          value = string.atoi(value)
>                  else:
>                          value = string.atoi(value[:-1]) * mult
>          return value
>
> The problem is as follows: Everytime a string with a postfix should get
> converted, mult does not get set properly. It is always 1. Does anyone
> have an idea how to fix this? I just don't see it, maybe because I'm
> pretty new to python or because I'm just blind I would be really greatful.
>
> Kind regards,
> Andy

Hello,

1. You call value.upper(), but you do not capture the results of that
method. Strings are immutable in Python.
>> value = value.upper()

2. You should use == instead of "is" in the comparison of mult being
1.
>> if mult == 1: