Python学习之路3?运算符

Posted 2020-08-30

 

#_*_coding:utf-8_*_
#!/usr/bin/env python

#取余/模
a=10
b=3
print(a%3)
x=1
y=3
print(x%3)

#真正的除法/
print(2/3)
#地板除：//,得到的结果是整数（商）
print(2//3) #得0

#逻辑运算
#逻辑与
print(True and False)
print(1 and ‘‘) #1的布尔值True，‘‘的布尔值False，所以1 and ‘‘ ---> True and False 得False-->‘‘

#逻辑或
print(True or False)
print(1 or ‘‘)

#in /not in
# 字典的成员运算针对的是key
print(‘a‘ in {‘a‘:1,‘b‘:2})

#is /is not
a=1
print(a is 1)
print(type(a) is int)

l=[]
print(type(l) is list)
d={}
print(type(d) is dict)
msg=‘hello‘
print(type(msg) is str)
t=()
print(type(t) is tuple)

# msg=‘‘
# print(msg+‘hello‘)

msg=‘abc‘
print(msg*12)

print(‘====‘*30)
l=[1,2]
print(l+[3])
print(l*3)