Find all the numbers in a string using regular expression in Python
Last Updated :
08 May, 2023
Given a string str containing numbers and alphabets, the task is to find all the numbers in str using regular expression.
Examples:
Input: abcd11gdf15hnnn678hh4
Output: 11 15 678 4
Input: 1abcd133hhe0
Output: 1 133 0
Approach: The idea is to use Python re library to extract the sub-strings from the given string which match the pattern [0-9]+. This pattern will extract all the characters which match from 0 to 9 and the + sign indicates one or more occurrence of the continuous characters.
Below is the implementation of the above approach:
Python3
import re
def getNumbers( str ):
array = re.findall(r '[0-9]+' , str )
return array
str = "adbv345hj43hvb42"
array = getNumbers( str )
print ( * array)
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Time Complexity : O(n), where n is length of str string.
Auxiliary Space : O(n), where n is length of array.
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