[python] Search for a string in a file

Hello

I just read your code and two questions come to mind.

#!/usr/bin/python
# -*- coding: iso-8859-1 -*-

strings = ["hello1",
"hello2",
"hello3"] # Text to search for

file = open("file.txt","r")
for line in file:
for string in strings:
if string in line:
print line
file.close()

strings is declared, but what do string and line correspond to?

And if you want to replace hello with goodbye in your text file, how would you do that?


I am asking you these two questions because I have the same problem right now.

Here's my code.

print "start" # start of the procedure

from os import chdir
chdir("/Volumes/GERTEX/_test/")

import shutil, string, re

input_file = open("taglist.xml","r") # Read from the taglist file the last 60 lines
lines = input_file.readlines()[-59:]
input_file.close()

output_file = open("temp_taglist.xml","w") # Copy to the temp_taglist file the last 60 lines
output_file.write("".join(lines))
s = '>442<'
re.sub(r'\s','>444<',s)
output_file.close()

shutil.copyfile('temp_taglist.xml','new_taglist.xml') # Copy from taglist.xml to new_taglist.xml

print "end" # end of the procedure

The principle is as follows: I copy the last 60 lines of a file that I rewrite into a temp file. In this file, I replace the character string 442 with 444. Once formatted, I wish to copy the entirety of this file back to my original file as the penultimate line.

If you can help me ... thank you in advance.

Hello

I have a little problem with searching for a string.

I followed your loop, but now I would like to implement it in a

(entr1, entr2) = (StringVar(),StringVar())

def toto():

s = open('/Volumes/GERTEX/_test/tampon_taglist.txt','r')
o = open('/Volumes/GERTEX/_test/tampon1_taglist.txt','w')

for i in s.readlines():
o.write('%s\n' % i.replace(entr1,entr2))

s.close()
o.close()

bou1 = Button(fen1, text='Validate', command = toto)

And there, when I compile, it stops on the line:
o.write('%s\n' % i.replace(entr1,entr2))

I think it comes from the declaration of the variables, but I don't understand the problem.


Here is the complete script:

from Tkinter import *
from os import chdir
chdir("/Volumes/GERTEX/_test/")
#chdir("/_test/")
import shutil, string, re

obfic = open("taglist.txt","r")# Reading from the taglist file the last 60 lines
lignes = obfic.readlines()[-59:]
obfic.close()

obfic = open("tampon_taglist.txt","w") # Copying to the tampon_taglist file the last 60 lines
obfic.write("".join(lignes))
obfic.close()

# Main program

fen1 = Tk()
fen1.title("Calculating values of TAG files")
fen1.geometry('500x300')

#(franc1,franc2,franc3,franc4,franc5,franc6,euro) = (StringVar(),StringVar(),StringVar(),StringVar(),StringVar(),StringVar(),StringVar())
(entr1, entr2) = (StringVar(),StringVar())

def seteuro():

s = open('/Volumes/GERTEX/_test/tampon_taglist.txt','r')
o = open('/Volumes/GERTEX/_test/tampon1_taglist.txt','w')

for i in s.readlines():
# o.write('%s\n' % i.replace(franc1,franc2)),('%s\n' % i.replace(franc3,franc4)),('%s\n' % i.replace(franc5,franc6))
o.write('%s\n' % i.replace(entr1,entr2))

s.close()
o.close()

# Listing of objects

txt1 = Label(fen1, text = 'Old ID1:')
txt2 = Label(fen1, text = 'New ID1:')
txt3 = Label(fen1, text = 'Old ID2:')
txt4 = Label(fen1, text = 'New ID2:')
txt5 = Label(fen1, text = 'Old mnemonic:')
txt6 = Label(fen1, text = 'New mnemonic:')
#txt7 = Label(fen1, text = '')

bou1 = Button(fen1, text='Validate', command = seteuro)
bou2 = Button(fen1, text='Quit', command = fen1.destroy)

entr1 = Entry(fen1)
entr2 = Entry(fen1)
entr3 = Entry(fen1)
entr4 = Entry(fen1)
entr5 = Entry(fen1)
entr6 = Entry(fen1)
#entr7 = Entry(fen1)


# Layout

txt1.grid(row =0)
txt2.grid(row =1)
txt3.grid(row =2)
txt4.grid(row =3)
txt5.grid(row =4)
txt6.grid(row =5)
#txt7.grid(row =5)

bou1.grid(row =10 ,column =1)
bou2.grid(row =10 ,column =2)

entr1.grid(row =0,column =1)
entr2.grid(row =1,column =1)
entr3.grid(row =2,column =1)
entr4.grid(row =3,column =1)
entr5.grid(row =4,column =1)
entr6.grid(row =5,column =1)
#entr7.grid(row =6,column =1)

# Start-up
fen1.mainloop()

Hello

Actually, I want to input my search and replace strings through a window.

And by pressing my button, change them in my txt files.

I will test the modification you provided me.

See you later, I think.

The problem is that I can't hardcode entr1='titi' and entr2='tot' in my program.

You see what I mean. I want the input fields to be equal to my two variables.

Or maybe I didn't understand.

Sle seb

Thank you for all your information, because it works like a charm.

But I have two problems that I need to identify.

The first is that in my txt file that I'm using, I have spaces between each line but I don't see which parameter is causing this.

The second is that after creating my executable with py2exe, a command prompt window opens every time and I would like to get rid of it.

And just so you know, I'm looking to integrate a sort of file explorer to browse for my files; can you help me out?

Thanks again.

Sure, thanks for the information, and from that, I should be able to solve my problem, I think.

Otherwise, did you understand the principle of my application?

ah yes, that's normal:

We retrieve the line (containing the newline character), and when I write the lines, I add \n.
So that makes two newlines.

That’s a mistake.

--
“Life is short - You need Python” -- Bruce Eckel, member of the ANSI C++ committee

Hello

I have one last small problem.

How can I write at the end of my file without overwriting what already exists?


Thank you in advance.

Thank you, it's working perfectly.

I have a small issue left.
This syntax works, but I want to add other variables, but the replacement only occurs on the first pair.

Do you have an idea?


o.write('%s\n' % i.replace(entr1.get(), entr2.get()))

o.write('%s\n' % i.replace(entr1.get(), entr2.get()),
'%s\n' % i.replace(entr3.get(), entr4.get()))

Thanks in advance.

Sure, thank you for the information.

I will look into trying to select programs through a browser.

I will probably get back to you for more info.


Thanks again.