Python: 3 keys in, 1 key out?!PRO

1, True and 1.0 are equal and hash the same, so they are ONE dict key. The last value wins.

# 3 keys in, 1 key out ?!
# 1, True and 1.0 are EQUAL in Python and have the same hash, so they are the same dict key.
d = {}
d[1] = "a"
d[True] = "b"
d[1.0] = "c"
print(d)   # {1: 'c'} ?!

print(1 == True == 1.0)              # True
print(hash(1), hash(True), hash(1.0))   # 1 1 1

No app yet? Install it, then open the app and type the code P8 in Code Library.