CODEWITHSUNDEEP
python
Heyya
Heyya

Reputation: 11

How to use Python read numbers and skip the letters

For example, my txt file looks like this:

coke: 100
mineral water: 200
wine: 500

I just want python to read the numbers of each, thank you!

Upvotes: 0

Views: 184

Answers (1)

Red
Red

Reputation: 27577

You can use the str.split() method:

with open('file.txt', 'r') as f:
    numbers = []
    for line in f.readlines():
        if ':' in line:
            numbers.append(int(line.split(':')[1]))

You could even use a list comprehension:

with open('file.txt', 'r') as f:
    numbers = [int(line.split(':')[1]) for line in f.readlines() if ':' in line]

If there will be lines of different format, you can try using the built-in re module:

with open('file.txt', 'r') as f:
     numbers = re.findall(r'\d+', f.read())

And you can convert the list of strings into integers using the built-in map() method:

with open('file.txt', 'r') as f:
     numbers = list(map(int, re.findall(r'\d+', f.read())))

Upvotes: 1

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