CODEWITHSUNDEEP
python
user7245451
user7245451

Reputation:

How to get information from a file into a tuple

I had to make a file : planets.txt with information about planets. The file looks like this:

Planet1 100 200

planet2 200 300

planet3 400 250

I have to write a function in python that returns a list with tuples of this information like this :

[(100,200),(200,300),(400,250)]

The problem is that I don't know how to write this function. Is there anyone who can help me? Thank you very very much !

Upvotes: 0

Views: 74

Answers (3)

ettanany
ettanany

Reputation: 19806

You need to split each line of your file and append the tuple of the second and the third items of each resulted list to res list like below:

res = []

with open('planets.txt', 'r') as f:
    for line in f:
        if line.split():  # I add this because from your input, seems that your file contains some blank lines!
            res.append(tuple(line.split()[1:]))

Output:

>>> res
[('100', '200'), ('200', '300'), ('400', '250')]

You can convert each tuple's items to integers like this:

>>> [tuple(map(int, item)) for item in res]
[(100, 200), (200, 300), (400, 250)]

Upvotes: 1

Mohammad Yusuf
Mohammad Yusuf

Reputation: 17064

If you are looking for compact code.

f = open('your_file_path').readlines()
print [tuple(map(int,a.split()[1:])) for a in f if a != '\n']

Output:

[(100, 200), (200, 300), (400, 250)]

Upvotes: 1

user1781434
user1781434

Reputation:

Something like this perhaps?

ret = []
lines = open('file.txt').readlines()
for line in lines:
    name, first, second = line.split(' ')
    ret.append((int(first), int(second)))

Upvotes: 1

Related Questions