Compile Error but solution works on my mac

• ``````class Solution:
# @return a string
a = [chr(one) for one in range(65, 65 + 26)]

def getMin(self, i):
from math import pow
result = 0
for i in range(i-1, -1, -1):
result += pow(26, i)

return result

def getValue(self, *args):
from math import pow
a = 0
for i in range(len(args) - 1, -1, -1):
a += pow(26, i) * args[-i - 1]

return a

def convertToTitle(self, num):
i = 1

while True:
min1, min2 = self.getMin(i), self.getMin(i+1)
if min1 < num < min2:
break
elif num == min1:
return "".join(["A"] * i)
elif num == min2:
return "".join(["A"] * (i+1))
i += 1

prefix = [1] * i

for i in range(len(prefix)):
while True:
if min1 < num < min2:
break
elif num == min1:
return "".join([self.a[one-1] for one in prefix])
elif num == min2:
return "".join([self.a[one-1] for one in adjustPrefix])
prefix[i] += 1

return "".join([self.a[one-1] for one in prefix])``````

• I tried python2.6, python2.7, all works. but here compile error.

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