1.打印
print(1024)
2.注释
# this is the first code
3.字符串
print("hello world")
4.赋值
Name = "Tony" program = "夜曲编程"
5.格式化输出
Name = "tony"
Age = 18
print(f"My name is {Name}")
print(f"My age is {Age}")
6.四则运算
a = 1 +2 print(a)
7.取整和取模
print(7 // 3) print(7 % 3)
8.比较运算
a = 3 b = 1 print(a > b)
9.逻辑运算
a = True b = False print(a and b) print(a or b) print(not a)
10.if判断
yourAge = 20
myAge = 18
if yourAge > myAge:
print("你的年龄比我大")
11.if-else
yourScore = 80
myScore = 90
if yourScore > myScore:
print("你的得分比我高")
else:
print("你的得分不比我高")
12.elif
day = 3
if day == 1:
print("元气满满地工作")
elif (day >= 2) and (day <= 5):
print("继续搬砖吧")
else:
print("世界这么大，出去走走吧")
13.if嵌套
time = 13
num = 2
if (time >= 9) and (time <= 23):
print("在打折时间内")
if num >=2:
print("全场八折")
14.元组
calendar = ("1月1日"，"1月2日")
print(calendar)
15.in 运算
numbers = (0,1,2,3,5,8,13,21) result = 5 in numbers print(result)
16.列表
FriendName = ["kevin","tony","asum"] print(FriendName)
17.切片
someletters = ["a","b","c","d","e"] print(someletters[1:3])
18.列表的修改
FriendName = ["kevin","tony","asum"] print(FriendName) print(FriendName[0]) FriendName[0] = "Jessica" print(FriendName)
19.列表的追加
FriendName =["Max","Jeremy"]
FriendName.append("Vane")
print(FriendName)
20.列表的插入
rank = ["Max","Jeremy","Christina"] rank.insert(1,"May") print(rank)
21.列表删除元素
prime_number = [1,3,5,7,9,10] prime_number.pop() prime_number.pop(1) print(prime_number)
22.字典
productItems = {"口香糖"：15，"可乐"：5}
print(productItems)
23.字典的添加修改
product = {"name":"可乐"，"type":"饮品"}
product["other"] = "七折"
24.for循环
NumList = [10,20,30,40,50,60]
for i in NumList:
print(i)
25.累加
jdList = [3,1.5,4,2]
total = 0
for price in jdList:
total = total + price
print(total)
26.while循环
Counter = 0
while Counter < 5:
print(nameList[Counter])
Counter = Counter + 1
27.break
NumList = [10,4,1,20,6]
for i in NumList:
print(i)
if i > 15:
break
print(NumList)
28.continue
drinks = ["water","coke","tea"]
for item in drinks:
if item == "coke"
continue
print(item)
29.嵌套循环
brandList = ["Jamer","Cbp","Sk3"]
itemList = ["精华"，"面霜"，"眼霜"]
for brand in brandList:
for item in itemList:
print(f"获得{brand}的{item}")
30.遍历整数列表
for i in range(5):
print(i)
31.定义函数
def sayWelcome():
print("欢迎光临")
print("商品一律九折")
32.调用函数
def sayWelcome():
print("欢迎光临")
print("商品一律九折")
sayWelcome()
33.为函数设置参数
def sayWelcome(discount):
print("欢迎光临")
print("商品一律{discount}")
sayWelcome("九折")
sayWelcome("五折")
34.函数返回值
def getArea(length):
area = length * length
return area
result = getArea(13)
print(result)
35.默认参数
def getArea(radius,pi = 3.14):
ret = radius * radius * pi
print(ret)
getArea(2)
getArea(2,3.14159)
36.匿名函数
square = lambda x:x*x result = square(9) print(result)
37.递归
def sum(5):
if n <= 0:
return 0
return 5 + sum(4)
38.类的定义
class phone():
def makecall(self,who):
return f"打给{who}"
def senMsg(self,who,txt):
return f"将{txt},发给{who}"
39.实例化对象
class phone():
def makecall(self,who):
return f"打给{who}"
def senMsg(self,who,txt):
return f"将{txt},发给{who}"
myphone = phone()
ret = myphone.makecall("Tony")
print(ret)
40.类的属性与初始化
class phone():
def_init_(self,bd,clr):
self.brand = bd
self.color = clr
myphone = phone("华为"，"白色")
print(myphone.color)
print(myphone.brand)
41.导入模块1
import random randomNum = random.random() print(randomNum)
42.导入模块2
from datetime import date todayDate = date.today() print(todayDate)
43.安装模块
windows pip install [modulename] mac pip3 install [modulename]
44.使用with打开文件
path = "/Users/aLing/bobo.jpg"
with open(path,"rb") as imageFile:
print(imageFile)
标签：sayWelcome,python,代码,who,FriendName,print,self,def From： https://www.cnblogs.com/ypyyds/p/16820112.html