Python find word and replace line in file

Question

i want search 'banana' word and replace line in file

for example

test.txt

"test tes apple tt estsetse setse tse banana tes test setset orange sets et setset sets etst"

search 'banana' and change line

'setse tse banana tes test'-> 'i like banana'

I'm guessing this is your homework; If you don't start writing programs yourself, you've failed your class already! Start by reading the file line by line and see what it prints out. Use a "find" type of function to see if the line contains "banana" etc. — Boop, Sep 03 '14 at 07:23

score 2 · Accepted Answer · edited Sep 03 '14 at 08:10

2

It is very simple...

please consider this code...

fp = open('D://source.txt',"r+")

fg = open('D://target.txt',"w")

for line in fp:

    if line.find("banana") != -1:
        new_line = line.replace(line,"i like banana\n")
        fg.write(new_line)

    else:
        fg.write(line)

fg.close()

fp.close()

edited Sep 03 '14 at 08:10

W1ll1amvl

1,219
2
16
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answered Sep 03 '14 at 07:43

gaurav_syscom

36
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Hey, can you please add why this answers the question to make it a better answer, cheers – W1ll1amvl Sep 03 '14 at 07:47

score 2 · Answer 2 · answered Sep 03 '14 at 07:54

You can also use this example:

lookup = 'banana'
with open(text.txt) as myFile:
  for num, line in enumerate(myFile, 1):
    if lookup in line:
       # do some work
       break # if the work is finished
    elif not lookup in line:
       # do smtg else
       pass
myFile.close()

Python find word and replace line in file

2 Answers2