How to extract numbers from a string in python

You can use regular expressions to extract numbers in strings.

import re

def extract_numbers(string):
numbers = re.findall(r'\d+', string)
return numbers

# 示例
string = 'Hello 123 World 456'
numbers = extract_numbers(string)
print(numbers) # 输出: ['123', '456']

In the above code, the re.findall() function uses the regular expression r'\d ' to match numbers in the string. \d means matching a numeric character, means matching one or more consecutive numeric characters. re.findall() The function will return all matching results, that is, a list of numbers in the string.

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