|
| 1 | +# 打印数字Number |
| 2 | +''' |
| 3 | +int(有符号整型) |
| 4 | +long(长整型[也可以代表八进制和十六进制]) |
| 5 | +float(浮点型) |
| 6 | +complex(复数) |
| 7 | +''' |
| 8 | + |
| 9 | +# 赋值整型变量 |
| 10 | +print(1) # 1 |
| 11 | + |
| 12 | +# 长整型 尝试失败 |
| 13 | +#print(51924361L) |
| 14 | + |
| 15 | +# 浮点型 |
| 16 | +print(1000.0) # 1000.0 |
| 17 | + |
| 18 | +# 复数 |
| 19 | +print(3.14j) # 3.14j |
| 20 | +print(3.14) # 3.14 |
| 21 | +print(.876j) # 0.876j |
| 22 | + |
| 23 | +# 打印数字计算 |
| 24 | +print(1+1) # 2 |
| 25 | + |
| 26 | +# 打印英文字符串 |
| 27 | +print("hello watermelon!") # hello watermelon! |
| 28 | + |
| 29 | +# 打印中文字符串 |
| 30 | +# python3 默认支持UTF-8格式 不用设置编码格式 |
| 31 | +print("欢迎来到西瓜的世界") # 欢迎来到西瓜的世界 |
| 32 | + |
| 33 | +# python2 不支持UTF-8格式 需要设置编码格式 否则遇见中文会报错 |
| 34 | +print("欢迎来到西瓜的世界") |
| 35 | + |
| 36 | +''' |
| 37 | +Non-ASCII character '\xe4' in file print.py on line 2, |
| 38 | +but no encoding declared; |
| 39 | +see http://www.python.org/peps/pep-0263.html for details |
| 40 | +''' |
| 41 | + |
| 42 | +# -*- coding: UTF-8 -*- |
| 43 | +# 或者 |
| 44 | +# coding=utf-8 |
| 45 | +# 可以选择上面两种设置编码格式中一种就好了 |
| 46 | +print("欢迎来到西瓜的世界") # 欢迎来到西瓜的世界 |
| 47 | + |
| 48 | +# 打印布尔值 |
| 49 | +# 注意python中布尔值的首字母是大写的 |
| 50 | +# print(true) # name 'true' is not defined |
| 51 | +print(True) #True |
| 52 | +print(False) #False |
| 53 | + |
| 54 | +# List(列表) 可变 |
| 55 | +d_list = [66.25, 333, 333, 1, 1234.5] |
| 56 | +print(d_list) # [66.25, 333, 333, 1, 1234.5] |
| 57 | + |
| 58 | +# Tuple(元组) 不可变 |
| 59 | +d_tuple_1 = 12345, 54321, 'hello!' |
| 60 | +d_tuple_2 = ((12345, 54321, 'hello!'), (1, 2, 3, 4, 5)) |
| 61 | +print(d_tuple_1) # (12345, 54321, 'hello!') |
| 62 | +print(d_tuple_2) # ((12345, 54321, 'hello!'), (1, 2, 3, 4, 5)) |
| 63 | + |
| 64 | +# Sets(集合){} |
| 65 | +d_set = {'apple', 'orange', 'apple', 'pear', 'orange', 'banana'} |
| 66 | +print(d_set) # {'apple', 'orange', 'apple', 'pear', 'orange', 'banana'} |
| 67 | + |
| 68 | +# Dictionaries(字典) |
| 69 | +d_dic = {'jack': 4098, 'sape': 4139} |
| 70 | +print(d_dic) # {'jack': 4098, 'sape': 4139} |
| 71 | + |
| 72 | +# 打印数据类型检测 |
| 73 | +d_list_1 = [{'name':'melon','age':1},{'name':'water','age':2}]; |
| 74 | +print(isinstance(d_list_1,list)) # True |
| 75 | +print(isinstance(d_list_1,dict)) # False |
| 76 | +print(isinstance(d_list_1,set)) # False |
| 77 | + |
| 78 | +d_dic_1 = dict({'name':'melon','age':[1,2]}) |
| 79 | +#{'name':'melon','age':[1,2]]},{'name':'water','age':[3,4]}; |
| 80 | +print(isinstance(d_dic_1,list)) # False |
| 81 | +print(isinstance(d_dic_1,dict)) # True |
| 82 | +print(isinstance(d_dic_1,set)) # True |
| 83 | + |
| 84 | +d_set_1 = set([1, 2, 3]) |
| 85 | +#{'name':'melon','age':[1,2]]},{'name':'water','age':[3,4]}; |
| 86 | +print(isinstance(d_set_1,list)) # False |
| 87 | +print(isinstance(d_set_1,dict)) # False |
| 88 | +print(isinstance(d_set_1,set)) # True |
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