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))