class MySeq:
	def __getitem__(self,index):
		return index

s=MySeq()
print(s[1])
print(s[1:4])
print(s[1:4:2])
print(s[1:4:2,9])
print(s[1:4:2,7:9])
print(slice)
print(dir(slice))
# print(help(slice.indices))
a=slice(None,10,2).indices(5)
print(a)
# s=slice(None,10,2)
# print(s)
