Largest Number Groupings in String in Python

The challenge

You are be given a string that has lowercase letters and numbers. Your task is to compare the number groupings and return the largest number. Numbers will not have leading zeros.

For example, solve("gh12cdy695m1") = 695, because this is the largest of all number groupings.

The solution in Python code

Option 1:

import re def solve(s): return max(map(int,re.findall(r"(\d+)", s)))
Code language: Python (python)

Option 2:

def solve(s): return max(map(int,"".join(" " if x.isalpha() else x for x in s).split()))
Code language: Python (python)

Option 3:

def solve(s): i, maxn, L = 0, 0, len(s) numStart = False while i < L: if s[i].isdigit(): j = i+1 while j<L and s[j].isdigit(): j += 1 if int(s[i:j]) > maxn: maxn = int(s[i:j]) i = j+1 else: i += 1 return maxn
Code language: Python (python)

Test cases to validate our solution

test.it("Basic tests") test.assert_equals(solve('gh12cdy695m1'),695) test.assert_equals(solve('2ti9iei7qhr5'),9) test.assert_equals(solve('vih61w8oohj5'),61) test.assert_equals(solve('f7g42g16hcu5'),42) test.assert_equals(solve('lu1j8qbbb85'),85)
Code language: Python (python)
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