探索python运算符的关联性

is_has_key = False
is_entered_door = False
is_passed_scan = False
is_know_password = True
 
# and比or的优先级高，or的结合性是左
print(is_has_key or is_entered_door and is_passed_scan or is_know_password)     # True
# 在复杂表达式中使用小括号指定运算顺序
print((is_has_key or (is_entered_door and is_passed_scan)) or is_know_password) # True
 
# 将复杂表达式拆分成几步来完成
step1 = is_entered_door and is_passed_scan
step2 = is_has_key or step1
step3 = step2 or is_know_password
print(step3)    # True