str 转 int

str_int = '10' 

str_space_int = '   12  '

int1 = int(str_int) # 10

int2 = int(str_space_int) # 12

str 转 float

str_float = '2.1'

float = float(str_float)

int 转 str

int = 10

str = str(int)

bool 转 int

bool_true = True

bool_false = False

int_true = int(bool_true) # 结果 1

int_false = int(bool_false) # 结果 0

任何类型 转 bool

airList = []

valuedList = [1]

zero = 0

str_null = ''

bool_ari_list = bool(airList) # 结果 False

bool_valued_list = bool(valuedList) # 结果 True

bool_zero = bool(zero) # 结果 False

bool_str_null = bool(str_null) # 结果 False

tuple 转 list

aTuple = (1, 2 ,3, 4) 

clist = list(aTuple) # 结果 [1, 2, 3, 4]

迭代器/生成器 转 list

def generator():

    yield 1

    yield 2

    yield 3

g = generator()

g_lis = list(g) # [1, 2, 3]

list 转 tuple

aList = [1, 2, 3, 4] 

cTuple = tuple(aList) # 结果 (1, 2 ,3, 4)