Read txt file from specific of line to a certain line base on string

Question

I am trying to write some function of data, however, my data is like this:

noms sommets
0000 Abbesses
0001 Alexandre Dumas
0002 Paris
0004 Nice
...
coord sommets
0000 308 536
0001 472 386
0002 193 404

What I want to is to access from nom sommets to 0004 Nice without knowing the number of line but base on the string value of txt

Asked By: Beam291

||

Source

Answer 1

Read text file to list split based on key word sommets

with open('text.txt') as file:
    lines = [line.rstrip() for line in file]

test_loop = []
for item in lines:
    if 'sommets' in item: 
        test_loop.append([item])
    else:  
        test_loop[-1].append(item)
print(test_loop)

which gives list of lists #.

[['noms sommets', '0000 Abbesses', '0001 Alexandre Dumas', '0002 Paris', '0004 Nice', '...'], ['coord sommets', '0000 308 536', '0001 472 386', '0002 193 404']]

If you want to access first set then.

for sublist in test_loop[0]:
    print(sublist)

Gives #

noms sommets
0000 Abbesses
0001 Alexandre Dumas
0002 Paris
0004 Nice
...

Answered By: Bhargav

Answer 2

we can read the whole txt file as single string then use regex to match the keyword.

re.DOTALL modifier will make ‘.’ match any character including newline

with open('text.txt') as f:
  txt = f.read()

match = re.search('noms sommets.*?0004 Nice', a, re.DOTALL).group()
# match = 'noms sommetsn0000 Abbessesn0001 Alexandre Dumasn0002 Parisn0004 Nice'

then, you can use match as variable or split it into list

>>> print(match)
noms sommets
0000 Abbesses
0001 Alexandre Dumas
0002 Paris
0004 Nice
>>>

Answered By: Skycc

Read txt file from specific of line to a certain line base on string

Question:

Answers: