This is an example on howt to convert a list of digits into an integer

numbers_from_digits.py

#Numbers from digits:
#How to convert a list of digits into a number

x = [2, 3, 4, 5, 9, 0]

#First way: ping-pong between string and integer
print int(''.join([str(d) for d in x]))


#Second way: plain arithmetic
powers = [10**k for k in range(len(x) - 1, -1, -1)]
print sum([d*p for d, p in zip(x, powers)])