Reading and Writing from files in python

Question

I have created a text file in python and I am struggling to find out how to print certain lines from the text file in python. hope someone can help me. I know it has something to do with f.write or f.read.

Possible duplicate of [Python: read file line by line into array](http://stackoverflow.com/questions/3277503/python-read-file-line-by-line-into-array) — , Feb 19 '16 at 13:19
You might have missed the part about [Reading and Writing Files](https://docs.python.org/3.5/tutorial/inputoutput.html#reading-and-writing-files) in the tutorial. — Matthias, Feb 19 '16 at 13:30

score 0 · Accepted Answer · answered Feb 19 '16 at 13:21

0

You could try something like this:

f = open("C:/file.txt", "r")  #name of file open in read mode

lines = f.readlines()   #split file into lines

print(lines[1])  #print line 2 from file

answered Feb 19 '16 at 13:21

Mark Skelton

3,663
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Thank you this has really helped – H14 Feb 19 '16 at 14:37

score 0 · Answer 2 · answered Feb 19 '16 at 13:27

0

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

if you are using *.json files good solution is:

data = json.loads(open('data.json').read()))

answered Feb 19 '16 at 13:27

Bohdan Biloshytskiy

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score 0 · Answer 3 · edited May 23 '17 at 12:07

Use the with keyword to automatically handle file closing after opening the file.

with open("file.txt", "r") as f:
    for line in f.readlines():
        print line #you can do whatever you want with the line here

This handles file closing even if your program breaks during execution. The other - manual way of doing the same is:

f = open("file.txt", "r")
for line in f:
    print line
f.close()

But beware that closing here happens only after your loop is executed. See also this answer Link

Reading and Writing from files in python

3 Answers3