Python的安装与简单使用

1. 安装环境

1.1 官网下载

地址： https://www.python.org/downloads/release/python-382/

下载后直接安装，无脑next

1.2 下载编辑器Pycharm

链接: https://pan.baidu.com/s/1oo8BD4IMQhNmwDYzTeWspQ 提取码: fmtm

破解方法：

1. 将下载好的补丁放在idea的安装目录下面的bin文件夹下面

2. 修改配置文件

   找到bin目录下的pycharm.exe.vmoptions和pycharm64.exe.vmoptions，用记事本打开，在最后一行添加

   -javaagent:D:\Software\PyCharm2018.3.4\bin\JetbrainsIdesCrack-4.2-release.jar

3. 修改系统的hosts文件

Windows系统hosts文件路径为：c:\windows\system32\drivers\etc

将0.0.0.0 account.jetbrains.com添加到hosts文件最后

4. 启动Pycharm破解成功

   

2. 简单的使用

2.1 字符串API

print('Hello World')
course='Python for Beginners'
 #字符串长度
len() 
# 字符串转大写
course.upper()
# 字符串转小写
course.lower()
# 字符串首字母大写
course.title()
# 查找字符串返回索引，没有返回-1
course.find()
#字符串替换
course.replace() 
#course中是否包含'...',返回布尔类型
'...' in course  

2.2 比较运算

name = "zhangsan"
if len(name) < 3:
    print("名字不能小于3个字符")
elif len(name) > 50:
    print("名字不能大于50个字符")
else:
    print("Name looks good")

2.3 将输入数字转为榜还是公斤

weight = int(input('Weight: '))
unit = input('(L)bs or (K)g: ')
if unit.upper() == "L":
    converted = weight * 0.45
    # 以 f开头表示在字符串内支持大括号内的python 表达式
    print(f"You are {converted} kilos")
else:
    converted = weight / 0.45
    print(f"You are {converted} pounds")

2.4 while循环打印三角形

i = 1
while i<=5:
    print('*'*i)
    i = i + 1
print('Done')

2.5 猜数字

secret_number = 9
guess_count = 0
guess_limit = 3
while guess_count < guess_limit:
    guess = int(input('Guess: '))
    guess_count = guess_count + 1
    if guess == secret_number:
        print('You won!')
        break
else:
    print('Sorry，you failed!')

2.6 控制车辆

command = ""
started = False
while True:
    command = input("> ").lower()
    if command == "start":
        if started:
            print("Car is already started!")
        else:
            started = True
            print("Car started...")
    elif command == "stop":
        if not started:
            print("Car is already stopped!")
        else:
            started = False
            print("Car stopped...")
    elif command == "help":
        print('''
start - to start the car
stop - to stop the car
quit - to quit
        ''')
    elif command == "quit":
        break
    else:
        print("Sorry,I don't understand that!")