how two join and arrange two files together

[amrita at iisermohali.ac.in]

I want to join column of two different data file but i want that the
entries will match (example i mentioned in my first mail, the position of
ALA eill match) if its not matching then it will get printed as such.

> amrita at iisermohali.ac.in wrote:
>
>> I tried to join these two files together using command.......
>>
>> from itertools import izip
>> from os.path import exists
>>
>> def parafiles(*files):
>>     vec = (open(f) for f in files if exists(f))
>>     data = izip(*vec)
>>     [f.close() for f in vec]
>>     return data
>>
>> for data in parafiles('/home/amrita/alachems/chem1.txt',
>> '/home/amrita/secstr/secstr.txt'):
>>     print ' '.join(d.strip() for d in data)
>
> parafiles has a bug: vec is a generator and hence cannot be run twice.
> Therefore the odd [f.close()...] list comprehension (don't use a list comp
> if you don't care about the result!) has no effect.
>
> If you change vec into a list you will be hit by another problem -- the
> for
> loop trying to operate on closed files. While the correct approach
> probably
> involves a contextlib.contextmanager I recommend that you concentrate on
> your real problem and keep parafiles() simple:
>
> def parafiles(*files):
>     open_files = (open(f) for f in files if exits(f))
>     return izip(*open_files)
>
>> it just joined the column of two files.
>
> Can you make an effort to express clearly what you want, preferrably with
> a
> simple and unambiguous example?
>
> Please keep the line widths below the threshold of 78 characters to avoid
> messing it up on its way to the reader.
>
> Peter
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


Amrita Kumari
Research Fellow
IISER Mohali
Chandigarh
INDIA