bool函数

bool函数:

1.输出结果为False 的有    0    ' '   " "  { }    [ ]   ( )    None

num = 0
print(bool(num))    #False

str= ' '            #空格也是字符串     
print(bool(str)         #False

dic={}
print(bool(num))        #False

tup = ()
print(bool(tup))      #False

lst = []
print(bool(lst)        #False

person= None
print(bool(person)      #False

2.输出结果为True的   非0  字符串 ，元组，集合，字典

num= 1
print(bool(num))

num=13
print(bool(num))

str = 'kaiwen'
print(bool(str))

tup = (2,'鲁肃','徐庶','sunny')
print(bool(tup))

set={'袭人',2,'平儿','welian}
print(bool(set)

dic= {'syc':'幸运','手机':'通讯'}
print(bool(dic))