数据类型的互换

1、int 与bool 的转换

#  int转化成bool：非0转换成bool是TRUE，0转换成bool是False
print(bool(2))
print(bool(-2))
print(bool(0))

# bool-->int
print(int(True))  # 1
print(int(False))   # 0

 

 2、int与str的转换

# int ----> str
i = 1
s = str(i)
# str ---> int
s = '123'
i = int(s)

 

3、str与bool的转换

# int ----> str
i = 1
s = str(i)
# str ---> int
s = '123'
i = int(s)

 

4、str与list的转换

# split  str--->list
s = ':alex:wusir:taibai'
l = s.split(':')
print(l)
#列表转化成字符串  list -----> str    join
li = ['taibai','alex','wusir','egon','女神',]
s = ''.join(li)
# str ----->list   split()
print(s)
s1 = s.split('')
print(s1)