python--运算符，字符编码

a += 20 # a = a+20

print(3 > 4 or 4 < 3 and 1 == 1)  # False
print(1 < 2 and 3 < 4 or 1 > 2)  # True
print(2 > 1 and 3 < 4 or 4 > 5 and 2 < 1)  # True
print(1 > 2 and 3 < 4 or 4 > 5 and 2 > 1 or 9 < 8)  # False
print(1 > 1 and 3 < 4 or 4 > 5 and 2 > 1 and 9 > 8 or 7 < 6)  # False
print(not 2 > 1 and 3 < 4 or 4 > 5 and 2 > 1 and 9 > 8 or 7 < 6)  # False

print(1 or 2)  # 1
print(2 or 3)  # 2
print(0 or 3)  # 3
print(0 or 4)  # 4
print(0 or 1 or 3 or 0 or 5)  # 1
print(1 and 2)  # 2
print(2 and 0)  # 0
print(0 and 3)  # 0
print(0 and 4)  # 0
print(0 or 4 and 3 or 7 or 9 and 6)  # 3
print(2 > 3 and 3)  # False false相当于0
print(2 < 1 and 4 > 6 or 3 and 4 > 5 or 6)  # 6

a = "你好"
a_new = a.decode("utf-8").encode("gbk")  # 第一个里填原来字符串的编码格式（原来的为utf-8），第二个填要转为的格式

abc = ‘西安‘
print(abc.encode(‘utf-8‘))
print(‘邹邹‘.encode(‘utf-8‘))  # 转换为二进制
print(b‘\xe4\xbd\xa0\xe5\xa5\xbd‘.decode(‘utf-8‘))  # 转换为字符串

b‘\xe8\xa5\xbf\xe5\xae\x89‘
b‘\xe9\x82\xb9\xe9\x82\xb9‘
你好