Question

How to read text file from line X to line Y in Python

Answer 1

from itertools import islice
 
x = 2
y = 4
with open('info.txt') as f:
    for line in islice(f, x - 1, y):
        print(line)
 
 
 
 
'''
run:
  
high-level, general-purpose 
 
programming language
 
python design philosophy emphasizes code readability
  
'''

 

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Answer 2

x = 2
y = 4
with open('info.txt') as f:
    for i, line in enumerate(f):
        if i >= x - 1 and i <= y - 1:
            print(line)


'''
run:
 
high-level, general-purpose 

programming language

python design philosophy emphasizes code readability
 
'''

 

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Answer 3

x = 2
y = 4
with open('info.txt') as f:
    line = f.readline()
    count = 1
    while line:
        if (count >= x and count <= y):
            print("Line {}: {}".format(count, line.strip()))
        line = f.readline()
        count += 1
        if (count > y): break


'''
run:
  
Line 2: high-level, general-purpose
Line 3: programming language
Line 4: python design philosophy emphasizes code readability
  
'''

 

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