Python의 주요 응용 분야는 무엇입니까? 파이썬 소개

<span style="font-size: 16px">变量<br>上述代码声明了一个变量，其变量名为name，而变量name的值为："Aaron Li"</span>

<span style="font-size: 16px">1.变量名只能是 字母、数字或下划线的任意组合<br>2.变量名的第一个字符不能是数字<br>3.一些关键字不能声明为变量名：<br>  ['and', 'as', 'assert', 'break', 'class', 'continue', 'def', 'del', 'elif', 'else', 'except', 'exec', 'finally', 'for', 'from', 'global', 'if', 'import', 'in', 'is', 'lambda', 'not', 'or', 'pass', 'print', 'raise', 'return', 'try', 'while', 'with', 'yield']<br><br></span>

# Author:Aaron LI<br><br>username = input("username:") <br>password = input("password:")<br>print (username,password)

#namne = input("name")<br>#age = input("age")<br>#job = input("job")<br>#salary = input("salary")<br>#info = """<br>#---------- into of %s ---------<br>#name:%s<br>#age:%s<br>#job:%s<br>#salary%s<br>#""" % (namne,namne,age,job,salary) %占位符跟上边的变量拼接起来<br>#print(info)<br># % DAY 1(10) 10:50处<br><br><br>#name = input("name")<br>#age = int(input("age"))<br>#job = input("job")<br>#salary = input("salary")<br><br>#info = """<br>#    ---------- into of %s-----------------<br>#    name:%s<br>#    age:%d<br>#    job:%s<br>#    salary:%s<br>#""" % (name,name,age,job,salary)<br>#print (info)<br><br>#推崇用此方法<br>name = input("name")<br>age = input("age")<br>job = input("job")<br>salary = input("salary")<br>info = """<br>    ----------info of {_name} --------------<br>    name:{_name}<br>    age:{_age}<br>   job:{_job}<br>    salary:{_slary}<br>""" . format(_name=name,<br>_age=age,<br>_job=job,<br>_slary=salary)<br>print(info)<br>

import getpass<br>username = input("username:")<br>password = input("password:")<br>

print(username,password)

# Author:Aaron LI<br><br>import getpass<br><br>_username = 'lixiguang'<br>_password = 'abc123'<br>username = input("username:")<br>password = input("password:")<br><br>if _username == username and _password == password:<br>print("Welcome  user {name} login......".format(name=username))<br>else:<br>print("Invalid username or password!")

# Author:Aaron LI<br><br>age_of_lxg = 25<br>guess_age = int(input("guess age:"))<br><br>if age_of_lxg == guess_age:<br>print("Input correct!")<br>elif age_of_lxg > guess_age:<br>print("The input digit is too large")<br>else:<br>print("The input numbers are too small")

for i in range(0,15):<br>print("Aaron",i)<br><br>

for i in range(0,19,2):<br>print("loop",i)  #2 每执行一个跳一个 （步长）

# Author:Aaron LI<br>age_of_lxg = 28<br>for i in range(3):<br> guess_age = int(input("guess_age:") )<br>if guess_age == age_of_lxg:<br>print("yes,you got it.")<br>break<br> elif guess_age > age_of_lxg:<br>print("thine smaller....")<br>else:<br>print("think bigger!")<br>else:<br>print("you have tried too times..")

count = 0<br>while True:<br>print("count:",count)<br>    count +=1 #count = count +1<br><br>

# Author:Aaron LI<br><br>age_of_lxg = 28<br>count = 0<br>while count < 3:
    guess_age = int(input("guess age:"))
if guess_age == age_of_lxg:
print("yes,you got it.")
break
    elif guess_age > age_of_lxg:<br>print("think smaller...")<br>else:<br>print("think bigger...")<br>    count +=1<br>    if count == 3:<br>        coutine_confim = input("do you want to keep guessing.....?")<br>if coutine_confim != 'n':<br>            count = 0

count = 0<br>while True:<br>print("count:",count)<br>    count +=1 #count = count +1<br>    if count == 1001:<br>break  #满足条件结束整个循环

for i in range(0,10):<br>if i <3:<br>print("loop",i)<br>else :<br>continue  #跳出本次循环，进入下次循环<br>    print("haha.....")