Python-基本運算符

# 01 比較運算符# >  >=# <  <=# ==# !=# print(10!=11)# 瞭解# x=None# # print(x == None)# # print(x is None)# l1=['abc',1,['a','b','c']]# l2=['abc','aa',]# print(l2 > l1)#02 邏輯運算符#and：鏈接左右兩個條件，只有兩個條件同時成立時and運算的結果爲True# print(10 > 9 and 3 > 2 and 'egon' == 'egon' and True)#or：鏈接左右兩個條件，兩個條件成立任意一個or運算的結果就爲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')