1158 | Python Fiddle

import itertools

def calculate(numbers):
    ops = ['+', '-', '*', '/']
    questions = ['']
    answers = []

tmp = []

for idx, number in enumerate(numbers):
        for question in questions:
            if idx == len(numbers)-1:
                tmp.append(question+number)
            else:
                for op in ops:
                    tmp.append(question+number+op)
        questions = tmp
        tmp = []

for question in questions:
        if eval(question) == 10:
            print question
        try:
            if eval(str(eval(question[0:7])) + question[7] + str(eval(question[8:]))) == 10:
                print '(' + question[0:7] + ')' + question[7] + question[8:]
        except:
            pass
        try:
            if eval(str(eval(question[0:11])) + question[11] + str(eval(question[12:]))) == 10:
                print '(' + question[0:11] + ')' + question[11] + question[12:]
        except:
            pass
        try:
            if eval(str(eval(question[0:3])) + question[3] + str(eval(question[4:]))) == 10:
                print question[0:3] + question[3] + '(' + question[4:] + ')'
        except:
            pass

numbers = ['1.0', '1.0', '5.0', '8.0']
permutations = list(itertools.permutations(numbers))
for permutation in permutations:
    calculate(permutation)

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