如何在 python 中使用正则表达式从字符串中提取数字和点？

Question

I am trying to extract number and dots from a string in python3 but with no success. Actually I tried using the regex search function but I get only the first number and not dots and the following number. Here's an example of my test

string = "CDS             complement(129..1049)"

print(int(re.search(r'\d+', string).group()))

129

But actually I would like to get:

129..1049

I tried also to improve my code with:

print(int(re.search(r'\d+\.\.\d+', line).group()))

but I get this error:

ValueError: invalid literal for int() with base 10: '129..1049'

Can you help me?

Thanks in advance.

Answer 1

Your regex works fine. re.search(r'\d+\.\.\d+', line) returns '129..1049' , and so when you try to pass that string to int() , it fails. You'll have to manually split the string into its two integer parts first.

Answer 2

You can use re to get all the numbers:

import re
str1 = "CDS             complement(129..1049)"
print(re.findall('\d+', str1))

I am not sure how to get the dots tho