To change a character to a time form in Python

>>> def hms2iso(s): 
    t = { e[-1]:int(e[:-1]) for e in s.split() }
    return "%02d:%02d:%02d"%( t.get('h', 0), t.get('m', 0), t.get('s', 0) )

>>> for e in s:
    print(e, hms2iso(e))


3m 32s 00:03:32
1h 23m 6s 01:23:06

>>> s = ["3m32s", "1h23m6s"]
>>> def hms2iso(f):
    num = ''
    t = {}
    for c in f:
        if c.isalpha():
            t[c] = int(num)
            num = ''
            continue
        num += c
    return "%02d:%02d:%02d"%( t.get('h', 0), t.get('m', 0), t.get('s', 0) )

>>> for f in s:
    print(f"{f} -> {hms2iso(f)}")


3m32s -> 00:03:32
1h23m6s -> 01:23:06