std in and stdout
hello, i have a question! how would i fix the following problem: now i have an input file with a fix name and an output file! i have this two files hardcoded written in the sourcecode of this function! in the future i will start this script with the command line. the syntax should be look like this: Python Function | Source File| Output File --- fileanalyse.pysourcefile.csv filenalyse.txt i will call the programm always with the commandline, that i could type in various filenames for the input and output files! could anybody help me?! -- http://mail.python.org/mailman/listinfo/python-list
delete first line in a file
hello, i am a dummy user in python and new in this programming language and so there will be questions, that´s for you no problem! i never have before programmed in any language! sorry for this! i hope you will help me, that i also could the basics in this language! and later many more, so i hope ! :) the first question for me in this newsgroup will be the follow one: - is there a way to delete in a csv-file the first line?! big thanks, juergen -- http://mail.python.org/mailman/listinfo/python-list
Re: delete first line in a file
Fredrik Lundh wrote: Juergen Huber wrote: i am a dummy user in python and new in this programming language and so there will be questions, that´s for you no problem! i never have before programmed in any language! sorry for this! i hope you will help me, that i also could the basics in this language! and later many more, so i hope ! :) the first question for me in this newsgroup will be the follow one: - is there a way to delete in a csv-file the first line?! in general, modern file systems can only remove and add stuff at the end of a file, so the only way to do this is to rewrite the entire file. (you can either load the entire file, fix it up, and write it out again, or copy the file to a new file, skipping the first line or row). /F ok...i thought as much, that i have to copy this file! how will i do that?! how will i fix this file = delete the first line?! with which commands could i do that?! thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: delete first line in a file
Fredrik Lundh wrote: Juergen Huber wrote: ok...i thought as much, that i have to copy this file! how will i do that?! how will i fix this file = delete the first line?! with which commands could i do that?! start here: http://docs.python.org/tut/node9.html#SECTION00920 /F that documentation i have already read, but it wouldn`t help me for my problem! i know, how i can read the first line an print them on the screen! but...how can i say python, delete the first line?! thats my problem! in the entry of my posting i wrote, that i am a newbie and so please understand me, that i ask so questions?! :-) thanks for your help! -- http://mail.python.org/mailman/listinfo/python-list
Re: delete first line in a file
this helps me! thank you very much! greetings, juergen JH Fredrik Lundh wrote: Juergen Huber wrote: ok...i thought as much, that i have to copy this file! how will i do that?! how will i fix this file = delete the first line?! with which commands could i do that?! start here: http://docs.python.org/tut/node9.html#SECTION00920 /F JH that documentation i have already read, but it wouldn`t help me for my JH problem! JH i know, how i can read the first line an print them on the screen! JH but...how can i say python, delete the first line?! JH thats my problem! as Fredrik told you, you can not delete the first line directly!!! JH in the entry of my posting i wrote, that i am a newbie and so please JH understand me, that i ask so questions?! :-) We are trying to understand that, but it is expected some effort on your side as well :) You didn't read the documentation properly! try to experiment with the code by yourself as well! Try: 1) open your file 2) use readlines() method which returns the list of ALL rows from the file and store them to some variable. it can be done for example like: all_lines = f.readlines() (if you do not know, what the list is, start here: http://docs.python.org/tut/node5.html#SECTION00514) 4) save the list members without its first member to the file for example: for line in all_lines[1:]: f.write(line) 5) close the file Good luck Petr Jakes JH thanks for your help! -- http://mail.python.org/mailman/listinfo/python-list
print shell output in a file
hello, one more question i will have! now i have written a little programm, which delivers me an output on the shell! here is the print command, which delivers me the following output (see below) on the shell: print '%-30s | %-12d | %-12d |%-12d ' % (typename, size / count, count, size) --NAME-|Groesse(Byte)-|Anzahl|-Gesamtgroesse (Byte)-| -- ADD_REAL_N6| 4| 1|4 AND_BOOL_N10 | 4| 1|4 AND_BOOL_N12 | 4| 1|4 Is there a way to put this output in an file?!?! i searched about 2h for this, but i couldn`t find an answer! thnks, juergen -- http://mail.python.org/mailman/listinfo/python-list
Re: print shell output in a file
hello,
if i would type in your code, i became the following output in the
output.txt - file
BOOL | 4 | 50463|201852
but why?!
he wouldn´t do that for all the entrys in the csv file! but only for the
first one in the file!
Stephan Wassipaul wrote:
f = file('output.txt','w')
print f, '%-30s | %-12d | %-12d |%-12d ' % (typename,
size / count,
count,
size)
f.close()
hello,
one more question i will have!
now i have written a little programm, which delivers me an output on
the shell!
here is the print command, which delivers me the following output
(see below) on the shell:
print '%-30s | %-12d | %-12d |%-12d ' % (typename,
size / count,
count,
size)
--NAME-|Groesse(Byte)-|Anzahl|-Gesamtgroe
sse
(Byte)-|
-
---
--
ADD_REAL_N6| 4| 1|4
AND_BOOL_N10 | 4| 1|4
AND_BOOL_N12 | 4| 1|4
Is there a way to put this output in an file?!?! i searched about 2h
for this, but i couldn`t find an answer!
thnks, juergen
--
http://mail.python.org/mailman/listinfo/python-list
