python按位計算時候容易出現的問題
- python中的and運算符,逐個進行比較
a = 60(-1)# -1也表示真,只有0表示假
b = 13
c = a and b
---
# c = 13
- python中的按位取與
a = 60 # 0011 1100
b = 13 # 0000 1101
c = a & b # 0000 1100
---
# c = 12
- 按位取異或
a = 60 # 0011 1100
b = 13 # 0000 1101
c= a ^ b # 0011 0001
---
# c=49
- 移位操作,一般的移位操作不是循環移位,移過了就沒有了
a = 60
a >> 1
---
# a = 60
#a = a >> 1
# a = 30
---
#a = a >> 5
# a = 1