[Tutor] how to get blank value

[शंतनू]

You may like to have a look @ pyparsing module.
URL: http://pyparsing.wikispaces.com/

HTH.
regards,
shantanoo

On 29-Jul-09, at 1:03 AM, amrita at iisermohali.ac.in wrote:

> with these data it is giving output but when I tried
>
> if __name__ == '__main__':
> data = open('chem.txt').readlines()
> for line in data:
>     line2 = line.split('=')
>     if not line2[5]: # C value missing
>       if len(line2[2]) <= 5 and len(line2[3]) <= 5:  # N and CA values
> missing
>         print "all missing", line
>       else:
>         print "C missing", line
>
> by putting data in .txt file then it is not giving output. Actually  
> I have
> few large data file what I want that I will put those lines in one  
> file
> for which only C value is missing and in another one I will put  
> those line
> for which N, CA and C all values are missing.
>
> Thanks for help.
> Amrita
>
>> amrita at iisermohali.ac.in wrote:
>>> It is not giving any value, without any error
>>>
>>> ph08001 at sys53:~> python trial.py
>>> ph08001 at sys53:~>
>>> it is coming out from shell.
>>>
>> Try this. I embedded the test data to simplify testing:
>>
>> data = """48 ALA H = 8.33 N = 120.77 CA = 55.18 HA = 4.12 C = 181.50
>> 104 ALA H = 7.70 N = 121.21 CA = 54.32 HA = 4.21 C =
>> 85 ALA H = 8.60 N =  CA =  HA = 4.65 C =""".split('\n')
>> for line in data:
>>   line2 = line.split('=')
>>   if not line2[5]: # C value missing
>>     if len(line2[2]) <= 5 and len(line2[3]) <= 5: # N and CA values
>> missing
>>       print "all missing", line
>>     else:
>>       print "C missing", line
>>
>> --
>> Bob Gailer
>> Chapel Hill NC
>> 919-636-4239
>>
>
>
> Amrita Kumari
> Research Fellow
> IISER Mohali
> Chandigarh
> INDIA
>
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