Python-基本运算符

# 01 比较运算符
# >  >=
# <  <=
# ==
# !=
# print(10!=11)

# 了解
# x=None
# # print(x == None)
# # print(x is None)

# l1=['abc',1,['a','b','c']]
# l2=['abc','aa',]
# print(l2 > l1)

#02 逻辑运算符
#and：连接左右两个条件，只有两个条件同时成立时and运算的结果为True
# print(10 > 9 and 3 > 2 and 'egon' == 'egon' and True)

#or：连接左右两个条件，两个条件成立任意一个or运算的结果就为True
# print(False or False or True or False or 3 > 10)

# res=(True or (False and True)) or ((False or True) and False)
#res=(True or False) or (True and False)
#res=True or False
# print(res)

#not
# print(not 10 > 3)

# x=None
# print(not x is None)
# print(x is not None)

# age1=18
# age2=19
# print(age2 is not age1)

#


name_1='huangdong'
pwd_1='123'
name=input('please input your name:')
pwd=input('please input your password:')
if name == name_1 and pwd == pwd_1:
    print('login successfull')
else:
    print('username or password error')