tuple_ = (1,2,3)
print(type(tuple_)) # <class 'tuple'>
tuple_ = 1,2,3
print(type(tuple_)) # <class 'tuple'>
tuple_ = 1,
print(type(tuple_)) # <class 'tuple'>
tuple_ = (1,)
print(type(tuple_)) # <class 'tuple'>
tuple_ = (1)
print(type(tuple_)) # <class '?'>