python基础部分语法

1.列表

player=["1","2"]

2.使用切片

print(player[0:1]);//打印第一个元素
for p in player[:1]:
	print(p)                                             

3.元组
不可修改的列表

a=(1,2,3)
a[0]=2//erro

4.判断条件and /or
5.if elif else判断

age = 12  
if age < 4:      
  price = 0  
elif age < 18:     
   price = 5 
elif age < 65:      
   price = 10 
else:      
   price = 5

if的用法

name =["k"]
if "k" in name:
	print("k in here")

6.字典
键值相对应

table={"name":"sneaker","color":"red"}
print(table['name'])  //结果为输出sneaker

1. 添加

table["name2"]="faker" //name2原本的table中不含有

2. 删除

del table['name2'] //删除table中的name2

3. 遍历
   键值同时：

for a,b in table.item():
	print("\na:"+a);
	print("b:"+b);

单独遍历键:

for a in table.keys():
	print(a)

单独遍历值:

for a in table.values():
	print(a)

7.用户输入input

message=input("请输入你要输出的信息")
print(message);

8.while break
continue都与c语言中同理

while 1:
    print(i)
    i+=1
    if i== 4:
        break

9.函数

def greet_hello():
	print("hello ")

greet_hello();//调用

传入任意数量的实参

def make_pizza(*toppings):    
"""打印顾客点的所有配料"""    
	print(toppings) 

make_pizza('pepperoni') 
make_pizza('mushrooms', 'green peppers', 'extra cheese')

10.函数导入

//pizza.py
def make_pizza(size, *toppings):    """概述要制作的比萨"""  
   print("\nMaking a " + str(size) +"-inch pizza with the following toppings:")    
   for topping in toppings:        
   		print("- " + topping)

//从pizza.py中导入make_pizza函数
//并将起取个别名为mp
from pizza import make_pizza as mp 
mp(16, 'pepperoni') 
mp(12, 'mushrooms', 'green peppers', 'extra cheese')

导入所有的函数

from pizza import *

11.类

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来源： https://blog.csdn.net/weixin_44866921/article/details/104112745