Python 学习笔记

>>> x=y=3
>>> print(x)
3
>>> x=3
>>> y=5
>>> x,y = y,x
>>> print(x,y)
5 3
>>> print("let's go")
let's go
>>> print("let's go")
let's go
>>> print(""life is short,let'slearn python"")
"life is short,let'slearn python"
>>> print("D:\three\two\one")     #\--原始转义字符
D:threetwoone
>>> '520'+'1314'
'5201314'
>>> 12023029>213312412414321
False

import random         #调用random  得出一个随机数
>>> random.randint(1,100)
98
>>> random.randint(10,1001)
132>>> 6/2
3.0
>>> 0.1+0.2
0.30000000000000004
>>> 0.3==0.1+0.2
False
>>> import decimal
>>> a = decimal.Decimal('0.1')     #此时0.1+0.2才等于0.3
>>> b = decimal.Decimal('0.2')
>>> print(a+b)
0.3
>>> c = decimal.Decimal('0.3')
>>> a+b ==c
True
>>> 0.00005
5e-05        #采用科学计数法
>>> 1+2j
(1+2j)
>>> x = 2+56j
>>> x.real
2.0
>>> x.imag
56.0
>>> -3//2
-2
>>> divmod(3,2)       #（除数，余数）
(1, 1)
>>> divmod(-3,2)
(-2, 1)
>>> x = -596
>>> abs(x)         # 取相反数
596
>>> x =51+46j
>>> abs(x)
68.6804193347711
>>> int('520')
520
>>> int(9.99)
9
>>> float('3.')
3.0
>>> complex("1+2j")
(1+2j)
>>> pow(2,3)
8
>>> 2**4
16
>>> pow(2,-3)
0.125
>>> pow(2,3,5)
3
>>> 2**3%5
3

"用Python设计一个小游戏"
import random
answer = random.randint(11,20)

counts = 3
while counts >0:
    
    temp = input("不妨猜一下我现在想的是几")
    guess = int(temp)    #用户输入一个数字

    if guess == answer:
        print("你是我肚子里的蛔虫吗？")
        print("哼，猜对了也没奖励")
        break
    
    else:
        if guess < answer:
            print("小了")
        else:
            print("大了")
    counts = counts-1     #缩进真的很重要

        
print("游戏结束，不玩啦")   #此处缩进与开头保持一致，若是与counts保持一致，则每一次都打印这句话，有错误！！！