Python入门学习03

Python基础入门学习小总结

1. str --> int
   a = ‘123’
   print(type(a))
   b = int(a)
   print(type(b))
2. float --> int
   c = 3.1415
   print(type©)
3. float 转整数返回的小数点前面的数据
   d = int©
   print(d)
   print(type(d))
4. boolean --> int False – 0 True – 1
   x = True
   y = int(x)
   print(y)
   print(type(y))

5. a = ‘1.123’ or a = ‘123dfg’
   b = int(a)
   print(b)

6. 字符串转浮点型
   a=‘12.34’
   b=float(a)
   print(type(b))
7. 整型转浮点型
   t = 111
   k = float(t)
   print(type(k))
   print(k)

8. 整型转字符串
   r = 80
   s = str®
   print(s)
   print(type(s))

9. 浮点型转字符串
   m = 2.32
   n = str(m)
   print(n)
   print(type(n))

10. 布尔类型转字符串
    g = True
    h = str(g)
    print(h)
    print(type(h))

11. 转换为布尔类型
    整数非0的整数和负数 – True; 0 转布尔为 False
    q = 3
    p = bool(q)
    print§
    print(type§)
    浮点数里非0的 – True; 0.0 转布尔为 False
    q1 = 3.9
    p2 = bool(q)
    print§
    print(type§)
    字符串转布尔 字符串有内容是 True; 没内容是 False
    test = ‘’ #‘werqree’ or ’ ’
    test1 = bool(test)
    print(test1)
    print(type(test1))
    列表 有数据是 – True 和 [] – False
    List = [a,‘b’,c,d]
    List1 = bool(List)
    print(List)
    print(type(List1))
    元组 有数据是 – True 和 () – False
    tuple = (‘w’,‘r’,‘t’)
    tuple1 = bool(tuple)
    print(tuple1)
    print(type(tuple1))
    字典 有数据是 – True 和 {} – False
    dict = {“a”:‘a’}
    dict1 = bool(dict)
    print(dict1)
    print(type(dict1))