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

Hedieh Ebrahimi hedieh.ebrahimi at amphos21.com
Mon Mar 25 13:36:17 CET 2013


Thanks Dougal, but one question, the full path  works if I am working on
this computer and with this user.

Is there anyway I could set this if i am planning to run the code on
another system?

Also I am getting output to an output.txt file which I have already
created.
Is there anyway to ask python to create a text file ?

I checked python File I\O but I couldnt find anything on creating files.

Id appreciate any help

Thanks



On 25 March 2013 12:32, Dougal Matthews <dougal85 at gmail.com> wrote:

>  You just need to use the full path to the file - for example;
>
> open('/path/to/file/p.txt')
>
> If your on windows that will likely that with c:// etc.
>
>  On Monday, 25 March 2013 at 11:28, Hedieh Ebrahimi wrote:
>
> 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
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