python各种进制求值的方法(代码实例)
def checkio(str_number, radix):
str_int = dict(map(lambda x,y:(y, x), [ i for i in range(10, 36) ], [ chr(i) for i in range(97, 123) ]))
int_int = dict(map(lambda x,y:(str(x),y), [ i for i in range(10) ], [ i for i in range(10) ]))
sum = 0
times = 0
for i in reversed(str_number):
v = int_int.get(i, None)
if v == None:
v = str_int.get(i.lower(), None)
if v >= radix:
return -1
else:
sum += v if times == 0 else v*radix**times
times += 1
return sum
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio("AF", 16) == 175, "Hex"
assert checkio("101", 2) == 5, "Bin"
assert checkio("101", 5) == 26, "5 base"
assert checkio("Z", 36) == 35, "Z base"
assert checkio("AB", 10) == -1, "B > A = 10"
print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")