L001-老男孩教育-Python13期VIP视频-19节-pbb

L001-老男孩教育-Python13期VIP视频-19节-pbb

Windows上安装 Python3开发环境

下载：www.python.org >选择Downloads>All releases- python3.5.2

设置环境变量:编辑>系统变量Path>在最后加入 ;D:\software\Python35

这里要把python.exe重命名为python3.exe

#推荐在脚本里这样写命令

#下面写法也可以，但是不推荐。

更换python解释版本

#打印用户输入

在pycharm里

ctrl+d 复制一行

#格式化字符串
name = input("input your name:")
age = int(input("input your age:"))  #将接受到的字符串强制转换成数字
job = input("input your job:")

print("name is:",name)
print("age is:",age)
print("job is:",job)

msg = '''
Information of user %s:
--------------------
name:   %s
age:    %d
job:    %s
-------End----------
'''%(name,name,age,job)     #%s字符串占位符，%d数字整数占位符，%f数字小数占位符。

print(msg)

#不明文显示密码。这一段在pycharm里不好用，但是可以在Linux里正常执行。

#Linux下执行

import os
os.system('df')
os.mkdir('yourDir')
cmd_res = os.popen("df -h").read()  #将df -h命令的输出保存到cmd_res里

#观察python的全局变量

>>> import sys

>>> print(sys.path)

['', '/usr/local/lib/python27.zip', '/usr/local/lib/python2.7', '/usr/local/lib/python2.7/plat-linux2', '/usr/local/lib/python2.7/lib-tk', '/usr/local/lib/python2.7/lib-old', '/usr/local/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/site-packages']

>>>

[root@bolin ~]# cd /usr/local/lib/python2.7/site-packages

[root@bolin site-packages]# ls         #将常用导入的包就放到这个目录里

READMEtab.py

#登录密码v1

user = 'alex'
passwd = 'alex3714'

username = input("username:")
password = input("pawwsord:")

if user == username:
    print("username is correct...")
    if password
== passwd:
        print("Welcome login...")
    else:
        print("password is invalid...")
else:
    print("连用户名都没蒙对！滚出！！！")

#登录密码v2

user = 'alex'
passwd = 'alex3714'

username = input("username:")
password = input("pawwsord:")

if user == username and passwd
== password:
    print("Welcome login")
else:
    print("Invalid username or password.")

pycharm里

缩进：选中 - tab

往回缩进：选中 - shift+tab

#猜年龄游戏
age = 22
counter = 0
for i in range(10):
    print('------------->counter:',counter)
    if counter < 3 :
        guess_num = int(input("input your guess num:"))
        if guess_num == age:
            print("Congratulations!you got it.")
            break #不往后走了，跳出整个loop。
        elif guess_num > age:
            print("Think smaller!")
        else:
            print("Think Big...")
    else:
        #print("too many attempts...bye")
        #break
        continue_confirm = input("Do you want to continue because you are stupid?")
        if continue_confirm == 'y' :
            counter = 0
            continue
        else:
            print("bye")
            break
    counter += 1

来自为知笔记(Wiz)