python基础知识,python必背内容,一、python的基
一、python的基础
1、简单写一行python代码:print("hello,world’)print("你好,北京’)
2、变量:name="刘梦雅"print(name)
程序交互:name=input"请输入你的名字”print(name)
3、数据类型
(1)int,long类型:a=2*20print(a,type(a))
(2)字符串类型str:name=input("请输入你的名字")print(name,type(name))()
(3)布尔类型:print(true,type(true))
4、if语句choice=input("请输入你猜的数字’)if choice=="2’ print("我请你吃饭’)else print("你请我吃饭’)
5、while语句
flag = true;count =1;while flag: print(count);
6、break语句:count=1while true: print(count) count=count+1 if count==101 break
7、continue语句count=0 while count<10; count =count +1if count ==7;continue ;print(count )
8、in not in的用法:comment =input("请输入你的评论’) if "傻子’ in comment: print ("您输入的为敏感词汇,请重新输入’)
9、while else
count = 1while True: print (count ) if count == 3:break count +=1else print("循环正常")
输出 1
2
3
count =1flag = Truewhile flag : print (count) if count == 3: flag=False count+=1else : print ("循环正常完毕")
输出:1
2
3
循环正常完毕
10、格式化输出:
1)第一种name=input("请输入你的名字:’)age =input("请输入你的年龄:’)hobby=input("请输入你的爱好:’)ms ="我叫%s,今年%d,爱好是%s’ % (name,int(age),hobby)print(ms)
2)第二种dic = {"name’:"oldboy","age":15,"hobby":"踢足球"}msg="我叫%(name)s,今年%(age)d,爱好是%(hobby)s’ % dicprint(msg)
3)第三种
再格式化输出中单纯的显示% 用%%解决name=input("请输入你的名字:’)age =input("请输入你的年龄:’)msg="我叫%s,今年%d,学习进度为1%%’ % (name,int(age))print(msg)
11、运算符print(int(True))print (int(False)) 输出:1 0 Trueprint(bool(100))
and or notprint (1 or 3) 输出 1print (1 and 3 ) 3print (0 or 2) 2print(0 and 2) 0print (1>2 or 3 and 4) 4
python基础知识
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python基础知识-python基础知识,python必背内容,一、python的基
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