convert tuple of digits to number

#!/usr/bin/env python3

data = (9, 8, 7, 6, 5, 4, 3, 2, 1, 0)

# --- example 1 ---

result = 0

for digit in data:
    result = result*10 + digit

print(result)

# --- example 2 ---

from functools import reduce

def fun(a, b):
    return a*10+b

result = reduce(fun, data)

print(result)

# --- example 3 ---

from functools import reduce

result = reduce(lambda a, b: a*10+b, data)

print(result)