try: from collections import namedtuple except ImportError: from _collections import namedtuple T = namedtuple("Tup", "foo bar") # CPython prints fully qualified name, what we don't bother to do so far #print(T) t = T(1, 2) print(t) print(t[0], t[1]) print(t.foo, t.bar) print(len(t)) print(bool(t)) print(t + t) print(t * 3) print([f for f in t]) print(isinstance(t, tuple)) try: t[0] = 200 except TypeError: print("TypeError") try: t.bar = 200 except AttributeError: print("AttribiteError") try: t = T(1) except TypeError: print("TypeError") try: t = T(1, 2, 3) except TypeError: print("TypeError") # Try comma field separator T2 = namedtuple("TupComma", "foo,bar") t = T2(1, 2) print(t) print(t.foo, t.bar) # Try list of fields # Not implemented so far #T3 = namedtuple("TupComma", ["foo", "bar"]) #t = T3(1, 2)