This was my original code:

class Sudoku(object):
data = []
d = {}
def init(self, data):
self.data = data
for i in range(len(data)):
self.d[i] = []
def is_valid(self):
if self.data == [['']]:
return False
for i in self.data:
for j in range(len(i)):
if(type(i[j])!=int):
return False
if i.count(i[j]) == 1:
if i[j] not in self.d[j] and j in self.d.keys():
self.d[j].append(i[j])
else:
return False
else:
return False
return True

It works for all of the test cases specified (executed on spyder), but for some reason fails them in the website. Not sure why

How could you submit it, even though it fails for a negative first array?