[Python Glasgow] How to write lines that start with TRAN to another output file

[Hedieh Ebrahimi]

Hi all,

I am getting an input file and then im writing to an output file.

Right now they are both in the current working directory.

If I want to get the file from a separate directory and write the output to
a separate directory not the same as the working directory, what should i
do?

Thanks for help

Hedie


On 21 March 2013 18:01, Hedieh Ebrahimi <hedieh.ebrahimi at amphos21.com>wrote:

> #! /usr/bin/python
>
> # Python Program to read a text file, edit it and give a text file as
> output
>
>
>
> #print("Python is really a great language,", "isnt it?");
> #searchquery='TRAN'
>
>
>
> with open('p.txt') as f1:
>  with open('Output.txt', 'a') as f2:
>     for line in f1:
>       if line.startswith(' TRAN'):
>         #print("true")
>         f2.write(line)
>         f2.write(f1.next())
>         #f2.write(f1.next())
>         ###columns = line.split()
>
> #with open('Output.txt', 'a') as f2:
> #f=open('Output.txt')
> with open('Output.txt') as f2:
>   with open('Output2.txt') as f3:
>     s=f2.readlines()
>     str1 = ''.join(s)
>     str1.split()
>     print(str1)
>     #f3.write(str1)
> #print('Split this Sentence'.split())
> #with open('Output2.txt') as f3:
>
>
>
> On 21 March 2013 15:44, Hedieh Ebrahimi <hedieh.ebrahimi at amphos21.com>wrote:
>
>> Thanks guys for help with previous question. its working now.
>>
>> I have another question. I need to extract information. so i now have a
>> file like this :
>>
>> TRAN      1 Time=  3.17098E-08 Dt=  3.17098E-08 [y] snes_conv_reason:    3
>>   newton =  36 [    36] linear =    36 [        36] cuts =  0 [   0]
>>   --> max chng: dcmx=   5.0315E-08 dc/dt=   5.0315E-08 [mol/s]
>>  TRAN      2 Time=  6.34196E-08 Dt=  3.17098E-08 [y] snes_conv_reason:
>> 3
>>   newton =   4 [    40] linear =     4 [        40] cuts =  0 [   0]
>>   --> max chng: dcmx=   3.0785E-08 dc/dt=   3.0785E-08 [mol/s]
>>  TRAN      3 Time=  1.26839E-07 Dt=  6.34196E-08 [y] snes_conv_reason:
>> 3
>>   newton =   4 [    44] linear =     4 [        44] cuts =  0 [   0]
>>   --> max chng: dcmx=   3.5161E-08 dc/dt=   1.7580E-08 [mol/s]
>>
>>
>> --------------------------------------------------------------------------------------
>> TRAN      1 Time=  3.17098E-08 Dt=  3.17098E-08 [y] snes_conv_reason:
>> 3
>>   newton =  36 [    36] linear =    36 [        36] cuts =  0 [   0]
>>   --> max chng: dcmx=   5.0315E-08 dc/dt=   5.0315E-08 [mol/s]
>>
>>
>> In this file i need the following information to be extracted in each
>> consequetive 3 lines. Could you please let me know how I can do this.
>>
>> At the end i want to have a text file at the output producing this:
>>
>> 1 Time 3.17098E-08 Dt 3.17098E-08 newton 36 linear 36 cuts 0
>>
>>
>> Id appreciate any hints,
>> ive just started python 2 days ago )))
>>
>> thanks
>>
>>
>>
>> On 21 March 2013 14:24, James Boyd <james.boyd at hotmail.co.uk> wrote:
>>
>>> Hi Heidi,
>>>
>>> Perhaps check your indentation, the code under the 'if' does not look
>>> indented correctly on my phone.  Also, assumption is that the p.txt file
>>> has some content where lines start with TRAN and the file/directory
>>> permissions are correct.
>>>
>>> I tried the code and works fine for me
>>>
>>> James
>>>
>>> On 21 Mar 2013, at 13:00, "Hedieh Ebrahimi" <
>>> hedieh.ebrahimi at amphos21.com> wrote:
>>>
>>> > Hi all,
>>> >
>>> > I am trying to write the below code to be able to read from a text
>>> file and fine lines that start with
>>> > TRAN  and then write this line and the next 2 following lines to
>>> another file called Output.txt.
>>> >
>>> > my code is as below:
>>> >
>>> >
>>> > with open('p.txt') as f1:
>>> > with open('Output.txt', 'a') as f2:
>>> >   for line in f1:
>>> >     if line.startswith('TRAN'):
>>> >   print("true")
>>> >       f2.write(line)
>>> >       f2.write(f1.next())
>>> >       f2.write(f1.next())
>>> >
>>> > but when i type python he.py in folder where the p.txt and Output.txt
>>> are located, nothing happens and no data is written to the output file.
>>> >
>>> > Could somebody please tell me where is my error?
>>> >
>>> > Thanks in advance
>>> > Heidi
>>> > _______________________________________________
>>> > Glasgow mailing list
>>> > Glasgow at python.org
>>> > http://mail.python.org/mailman/listinfo/glasgow
>>> _______________________________________________
>>> Glasgow mailing list
>>> Glasgow at python.org
>>> http://mail.python.org/mailman/listinfo/glasgow
>>>
>>
>>
>
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