CODEWITHSUNDEEP
python
HICHEM
HICHEM

Reputation: 73

How to extract a text in a file python

How to extract a text in a file with python. - A text begin with chaine.

My code is 

fichier= open("Service.txt", "r")
for ligne in fichier:
  if ligne==chaine:
  #What do I do ? 
fichier.close()

Upvotes: 3

Views: 171

Answers (6)

Radan
Radan

Reputation: 1650

with open("Service.txt", "r") as fichier:
    for ligne in fichier.readlines():
      if 'Call' in ligne:
      #What do I do

Try this.

Upvotes: 0

HICHEM
HICHEM

Reputation: 73

Thank you all.

This is a file (Service.txt) while, I use to recover a text with it.

A text is only:

     Supplementary service  =  Call forwarding unconditional


                            =  Call waiting


                            =  Calling line identification presentation

Service.txt

Thank you.

Upvotes: 0

Mikhail Gerasimov
Mikhail Gerasimov

Reputation: 39616

If I understood question correctly:

test.txt

fsdfj ljkjl
sdfsdf ljkkk
some ldfff
fffl lll
ppppp

script:

chaine = 'some'

with open("test.txt", "r") as f:
    text = f.read()
    i = text.find(chaine)
    print(text[i:])

output:

some ldfff
fffl lll
ppppp

Upvotes: 2

André Laszlo
André Laszlo

Reputation: 15537

with open("Service.txt", "r") as f:
    lines = f.readlines()
chaines = [line for line in lines if line.startswith("chaine")]
for chaine in chaines:
    print("Some chaine, whatever that is", chaine)

This uses a list comprehension, the if part will filter out any line that doesn't start with "chaine".

The with block is a context manager, it makes sure to close the file when the block ends, even if there is an exception.

Upvotes: 1

Adem Öztaş
Adem Öztaş

Reputation: 21506

You can try like this,

>>> with open('Service.txt', 'r') as f:
...     val = f.read()
>>> if "cheine" in val:
... # do something

Upvotes: 0

Neel
Neel

Reputation: 21317

You have to check in operator with string.

Like 

>>> a = "cheine is good"
>>> "cheine" in a
True

So your code must be like.

fichier= open("Service.txt", "r")
for ligne in fichier:
  if chaine in ligne:
  #What do I do ? 
fichier.close()

If you have to check start only in line, then you can check ligne.startswith.

Upvotes: 1

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