python | 运算符 | 逻辑运算符

# encoding: utf-8

# None与0都为False
print(bool(None))
print(bool(0))

# 短路运算符规则
# 假与取左
print(0 and 90)

# 真或取左
print(90 or 43)

# 假或取右
print(0 or 78)

# 真与取右
print(78 and 89)