Python | operator: Bitwise or and dict merging with __or__

In Python, we use “or” for conditions. | is bitwise (not boolean) “or”:

x = 10 # 0b1010
y = 13 # 0b1101

x | y # 15, or 0b1111

| runs __or__. On dicts, | combines.

d1 = {'a':10, 'b':2}
d2 = {'b':10, 'c':30}
d1 | d2  # {'a': 10, 'b': 10, 'c': 30}, right side wins