How do I print certain lines from a text file every time in python

Question

I don't know how to print certain lines of code from a text file. All it is doing nothing when I run the below code.How to read specific lines from the file ?.

line = open ("random.txt",2)
print(line)
line = open ("random.txt",5)
print(line)
line = open ("random.txt",7)
print(line)
line = open ("random.txt",9)
print(line)
line = open ("random.txt",10)
print(line)
myFile.close()

my output can be random string and I don't mind as long as it prints only the set of lines.

score 2 · Answer 1 · answered Feb 21 '16 at 20:39

2

open takes a mode as its second argument, not a number. I think what you need is this:

with open("random.txt") as open_file:
    lines = open_file.readlines()
    print(lines[2])
    print(lines[5])
    ...

The with block will take care of closing the file.

answered Feb 21 '16 at 20:39

zondo

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does not work sorry. – Pocketwarloc Feb 21 '16 at 21:07
Why doesn't it work? Is there an error, or does it do the wrong thing? – zondo Feb 21 '16 at 21:07

score 0 · Answer 2 · answered Feb 21 '16 at 20:41

wanted_lines = [2,5,7,9,10]
count = 1
with open('random.txt', 'r') as infile:
     for line in infile:
          line = line.strip()
          if count in wanted_lines:
               print(line)
          else:
               pass
          count += 1

How do I print certain lines from a text file every time in python

2 Answers2