目录
以下的都是在Python3.X环境下的
使用 input 函数接收用户的输入，返回的是 str 字符串
最简单的打印
>>print("hello,word!")
hello,word!打印数字
>>a=5
>>b=6
>>print(a)
>>print(a,b)
>>print(a+b)
5
5 6
11打印字符
使用逗号连接会有空格，使用+号连接没有空格
>>a="hello,"
>>b="world!"
>>print(a,b)
>>print(a+b)
hello, world!
hello,world!特别注意，当字符串是等于一个数的时候，这样两个字符串相加还是字符串。要把字符串转化为数字类型的才可以使用相加
>>a=input("请输入第一个数字：") #20
>>b=input("请输入第二个数字: ") #10
>>print(a,b)
>>print(a+b)
>>print(int(a)+int(b))
20 10
2010
30字符串的格式化输出
>>name="小谢"
>>age="20"
>>print("{}的年龄是{}".format(name,age))
>>print("%s的年龄是%s"%(name,age))
小谢的年龄是20
小谢的年龄是20
>>print("i have a {1} and have a {0}".format("apple","orange"))
i have a orange and have a apple
>>print("i have a {one} and have a {two}".format(one="apple",two="orange"))
i have a apple and have a orange
>>print("i have a {} and have a {two}".format("apple",two="orange"))
i have a apple and have a orange
>>import math
>>print("{1:.3f} and {0.4f}".format(math.pi,math.e))
2.718 and 3.1416
#自动填充
>>print('12'.zfill(5))
>>print('-3.14'.zfill(7))
00012
-003.14
>>print('Hi,%s!'%input('Please enter your name!')) //接收用户的输入，然后打印出来
Please enter your name!xie // xie 是用户输入的
Hi,xie! pprint打印
pprint模块用于打印 Python 数据结构. 当你打印特定数据结构时你会发现它很有用(输出格式比较整齐, 便于阅读)
import pprint
data = (
"this is a string", [1, 2, 3, 4], ("more tuples",
1.0, 2.3, 4.5), "this is yet another string"
)
print(data)
print("*"*100)
pprint.pprint(data)
######################################
('this is a string', [1, 2, 3, 4], ('more tuples', 1.0, 2.3, 4.5), 'this is yet another string')
******************************************************************************************
('this is a string',
[1, 2, 3, 4],
('more tuples', 1.0, 2.3, 4.5),
'this is yet another string')