学Python的第六天，,今天发愤图强，死学P

今天发愤图强，死学Python!!!!

为此小编还买了自己喜欢的McPython!

从小老师就说兴趣是最好的老师，所以呢买这本书是想通过我的世界这款游戏来提高自己的学习兴趣！！！

当然也有私心啦....

#!/usr/bin/env python# -*- coding:utf8 -*-#布尔值v = 1==1print (v)a = 1 != 2print (a)"""先计算括号内 ****True OR  ==> TrueTrue AND ==> 继续走False OR ==> 继续走False AND==> False"""user = "alex"pwd = "123"v = user == ‘alex‘ and (pwd == "123" or 1 == 1) and pwd == "1234"print(v)#算数运算=赋值运算count = 0number = 0count = count + 1number += 1print (count==number)#结果是真实值#算数运算a = 10 * 10print(a)#赋值运算b = 0b = b + 1b  += 1print(b)#结果是布尔值#比较运算c = 1 > 5cprint(c)#逻辑运算d = 1>6 or 1 == 1print(d)#成员运算e = "啊" in "阿坤"print(e)#基本数据类型#数字num = 123v=num.bit_length()print(v)#字符串name = "csdnak"v1 = name.upper()print(v1)"""整形intPython3里，31415926159261592615...(无限)Python2里，1234567890（有范围）长整型longPython2里,31415926159261592615..."""#数字魔法在int里,ctrl+鼠标左键点击inta = 404b = a.bit_length()print(b)#type()照妖镜，可查看所属类型c = "123"print(type(c),c)d = int(c)d =  d + 321print(type(d),d)#进制转换2,8,16进制等num = "a"v = int(num,base=16)print(v)#当前数字的二进制至少用n位表示age = 10r = age.bit_length()print(r)#字符串str里,ctrl+鼠标左键点击str.s1 = "csdnak"a = s1.upper()b = s1.title()c = s1.startswith(‘cs‘)print(a,b,c)#首字母大写v = s1.capitalize()print(v)#所有变小写，casefold更牛逼，很多未知的对象应变小写v1 = s1.casefold()print(v1)#跟casefold功能一样,但是只能使常规字符变小写v2 = s1.lower()print(v2)#20代表总长度并且字符居中#*号为填充符号可有可无,也可以是其他任何字符但只限1位v3 = s1.center(20,"*")print(v3)#在s1中包含几个c#2为起始位置，5为结束位置，二者可有可无v4 = s1.count(‘c‘,2,5)print(v4)#以什么什么结尾#以什么什么开始 返回bool布尔值v5 = s1.endswith(‘dn‘)v6 = s1.startswith(‘c‘)print(v5,v6)#从开始往后找，找到第一个之后，获取其位置#> 或>=,支持区间(例：大于等于9小于12)找不到输出为-1test = "csdngithubak"v7 = test.find(‘bak‘,9,12)print(v7)#格式化,将一个字符串中的占位符替换为指定的值#如果对象为数字则从左往右按顺序来替换(第一位为0)t = ‘i am {name},age {num}\n‘t1 = ‘i am {0},age {1}\n‘v8 = t.format(name=‘wxk‘,num=19)v9 = t1.format(‘wxk‘,19)#基于字典格式化,传入的值{"name":‘wxk‘,"num":19}v10 = t.format_map({"name":‘wxk‘,"num":19})print(v8,v9,v10)#index找不到就会报错，所以一般都用findv11 = test.index(‘8‘)print(v11)#字符串中是否只包含 字母或数字,若不是则返回False#也可以纯数字和字母t2 = "csdnak187"v12 = t2.isalnum()print(v12)"""#列表list里，ctrl+鼠标左键点击list....#元祖 tuple里，ctrl+鼠标左键点击tuple....#字典 dict里，ctrl+鼠标左键点击dict....#布尔值bool里,ctrl+鼠标左键点击bool...."""

学Python的第六天