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  • 得做好笔记了

    """
    name = raw_input("Username")
    pwd = raw_input("PassWord")
    if name == "alex"and pwd == "123":
        print('yes')
    else:
        print('no')
    """
    
    inp = raw_input(">>>")
    if inp == "1":
        print('111')
    elif inp == "2":
        print('222')
    elif inp =="3":
        print('333')
    else:
        print('...')
        
        
        
    if name == "alex" or name == "eric":
        只要满足任何一个or的条件,进入当前代码块
        
    1.
    if 条件:
        代码块
    else:
        代码块
    2.
    peif 条件:    
        代码块
    else:
        代码块
    else:
        代码块
    
    
    3/条件:
       True        False
       1 > 2 n1 > n2   n1 == n2
       name == "alex" or name == "eric"
       name != "alex"
       name == "alex" and pwd == "123"
       
    """
    import time
    
    n1 = True
    
    while n1:
        print('1')
        time.sleep(1)
        n1 = False
    
    print('end')
    """
    
    
    """
    import time
    kaishi = 1
    flag = True
    while flag:
        print(kaishi)
        if kaishi == 10:
            flag = False
        kaishi = kaishi + 1
        time.sleep(1)
    print('end')
        
    
    
    
    kaishi = 1
    while True:
        print(kaishi)
        if kaishi == 10:
            break
        kaishi = kaishi + 1
    
    #使用while循环输入1-10除7以外(break用于跳出所有循环,并且breake后面的代码不再执行
    continue用于跳出本次循环,继续下次循环)"""
    start = 1
    while True:
        if start == 7:
            start += 1
            continue
        print(start)
        if start == 10:
            break
        start += 1
        
    # _*_ coding:utf-8 _*_
    
    temp = "张强"# utf-8 
    #解码,需要指定原来是什么编码
    temp_unicode = temp.decode('utf-8')
    #编码,需要指定要编成什么编码
    temp_gbk = temp_unicode.encode("gbk")
    
    print(temp_gbk) 
    
    
    算数
        + - * / %(取余) //(整除)
        py2: 9/2=4
          9/2=4.5(导入模块)
        py3: 9/2=4.5
    
    PYCHARM
            1、模板
                file=>settings=>Editor=>file and code templete=> python script=>
                # usr/bin/env python
                # _*_ coding:utf-8 _
                    from __future__ import division
                    val = 9/2
                    print (val)
            2、文字大小
                file => settings=>editor=>color and front=>save as..=>zitidaxiao
            3、运行
                a.点击要运行的文件,右键run
                b.
                    view=>toolbar
                    选中要执行的文件
                    点击运行
                c.在当前文件空白处,右键,run
            4.切换py版本
                file=>settings=>
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  • 原文地址:https://www.cnblogs.com/zq6041/p/6782744.html
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