[Tutor] how to read two files and substitute

[lina]

May I ask another question:

where I can get some advanced, terse and powerful python tutorials.
short but powerful and a bit hard to understand at first.

Thanks again,

On Wed, May 18, 2011 at 1:51 AM, Emile van Sebille <emile at fenx.com> wrote:
> On 5/17/2011 9:47 AM lina said...
>>
>> A further question:  I don't know how can I get the final output is
>> unique?
>
> That'll require some rework.  The mapping container replaces
> mapping[parts[0]] each time it encounters another parts[0].
> You can test if you are about to add a new entry or replace
> an existing one with "if parts[0] in mapping:" if that helps.
>
> Emile
>
>
>
>
>>
>> #!/bin/python
>>
>> mapping={}
>> for line in open("confout.pdb").readlines():
>>     parts=line.strip().split()
>>     if len(parts)>6:
>>         mapping[parts[1]]=parts[4]+parts[3]
>> origs=open("dummy.atomID").read().split()
>> print " ".join([mapping[orig] for orig in origs])
>>
>> Thanks again,
>>
>>
>>
>> On Wed, May 18, 2011 at 12:36 AM, lina<lina.lastname at gmail.com>  wrote:
>>>
>>> Thanks, it works.
>>>
>>> On Tue, May 17, 2011 at 11:53 PM, Emile van Sebille<emile at fenx.com>
>>>  wrote:
>>>>
>>>> On 5/17/2011 8:31 AM lina said...
>>>>>
>>>>> Following Michiel's code (a little adjustment was done):
>>>>>
>>>>
>>>> Well. you're almost there.  The error you're getting
>>>> is likely due to splitting an empty line, then referencing
>>>> the [1] and [4] elements.
>>>>
>>>> After you split the line into parts, test to confirm
>>>> that the fields you need are there:
>>>>
>>>>> #!/bin/python
>>>>>
>>>>> mapping={}
>>>>> for line in open("confout.pdb").readlines():
>>>>>   parts=line.strip().split()
>>>>
>>>>     if len(parts)>3:
>>>>
>>>>>   mapping[parts[1]]=parts[4]
>>>>
>>>> also, note that python indexes from zero, so this should be
>>>>     mapping[parts[0]]=parts[3]
>>>>
>>>>> origs=open("dummy.atomID").read().split()
>>>>> print " ".join([mapping[orig] for orig in origs])
>>>>
>>>>
>>>> Emile
>>>>
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>>>
>>>
>>>
>>> --
>>> Best Regards,
>>>
>>> lina
>>>
>>
>>
>>
>
>
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-- 
Best Regards,

lina