python 基础学习1

‘‘‘import random #随机数标准库name ="let‘s go"age=11title=‘你好"python"‘content=‘"how old are you‘加油‘"print(type(age)) #打印age变量类型print(name)#输出name变量#age=input(‘请输入你的年龄‘) #input接收输入的值，且输入进来的都是string类型num=random.randint(1,10)#输出随机数print(num)‘‘‘#密码不回显getpass在pycharm中不生效#import getpass#password=getpass.getpass(‘请输入密码:‘)#print(password)#----------------------if 语法类型  if  条件 ： else:#age=input(‘请输入年龄：‘)#age=int(age)#if age <18:#    print(‘未成年人‘)#else:#    print(‘成年人‘)#------------------多重if判断# score =input(‘请输入你的分数：‘)# score=int(score)# if score >=90:#    print(‘成绩优秀‘)# elif score <90 and score >=80:#    print(‘成绩优良‘)# elif score >=60:#    print(‘成绩及格‘)# else:#    print(‘成绩未及格‘)#--------------whille 循环  count计数器# n=10# count=0# while count <n:#     print(count)#     count +=1#-------------while else 判断## num =5## count =0# while count<3:#     guess=input(‘请输入你猜得数字：‘)#     guess=int(guess)#     if guess <num:#         print(‘猜小了‘)#     elif guess >num:#         print(‘猜大了‘)#     else:#         print(‘猜对了‘)#         break#     count +=1# else:#     print(‘猜奖次数已用完‘)#------------for 循环#num=5#count=0  for循环中 count变量会自增  0-3# for count in range (3):#      guess =input(‘请输入你猜得数字：‘)#      guess=int(guess)#      if guess <num:#          print(‘猜小了‘)#      elif guess>num:#          print(‘猜大了‘)#      else:#          print(‘猜对了‘)#          break# print(‘次数已用完‘)#---------------占位符 输出 %s 字符串   %d 整数 %.2f:保留两位小数 占位符  后面%（变量1，变量2）# import datetime# today1=datetime.date.today();# welcome= ‘欢迎光临今天得日期是：‘ + today1#print(welcom)#welcom1=‘欢迎光临今天得日期是：%s‘%(today1)#print(welcom1)username = input(‘请输入用户名‘)# welcome = ‘欢迎光临‘ + username   #这种种方式，不推荐使用，浪费内存# print(welcome)welcome=‘欢迎光临{yourname}‘.format(yourname=username)print(welcome)