1,作业讲解
1 # s = '132a4b5c' 2 # s1 = s[0]+s[2]+s[1] 3 # print(s1) 4 5 index = 0 6 # while 1: 7 # print(s[index]) 8 # index+=1 9 # if index == len(s):break 10 11 12 # 如: conten = input ('请输入内容) 13 14 # 如果用户输入：5+9 或 5+ 9或5 + 9,然后进行分割计算 15 # content = input('>>>').strip() 16 # index = content.find('+') 17 # a = int (content[0:index]) 18 # b = int(content[index+1:]) 19 # print(a+b) 20 21 # 任意输入一串文字+数字，统计出数字的个数 22 s = input('请输入：') 23 count = 0 24 for i in s: 25 if i.isdigit(): 26 count += 1 27 print(count) 28 # #使用while和for循环分别打印字符串s='fkld'中的每个元素 29 # s='asferd' 30 # for i in s: 31 # print(i) 32 #while 33 34 #
2.list相关内容
1.list基础操作
1 # li = ['alex',[1,2,3],'wusir','egon','女神','taibai'] 2 # l1 =li[0] 3 # print(l1) 4 # l2=li[1] 5 # print(l2) 6 # l3 = li[0:3] 7 # print(l3)
2.append增加
1 # li = ['alex',[1,2,3],'wusir','egon','女神','taibai'] 2 # li.append('日天') 3 # li.append(1) 4 # print(li) 5 # li = ['alex',[1,2,3],'wusir','egon','女神','taibai'] 6 # while 1: 7 # yuangong=input('输入姓名：') 8 # if yuangong.strip().upper()== 'Q': 9 # break 10 # li.append('yuangong ') 11 # print(li)
（1）指定位置添加
# li = ['alex',[1,2,3],'wusir','egon','女神','taibai'] # li.insert(4,'春哥') # print(li)
（2）迭代添加
1 # li = ['alex',[1,2,3],'wusir','egon','女神','taibai'] 2 # li.extend('二哥') 3 # li.extend('1,2,3') 4 # print(li)
3.删除
1 # li = ['alex',[1,2,3],'wusir','egon','女神','taibai'] 2 # name=li.pop(1) #返回值 3 # # name=li.pop()#默认删除最后一个 4 # print(name,li)
（1）按元素删除
1 #li.remove('taibai)#按元素删 2 #print(li)
（2）清空
1 #li.clear()#清空 2 #print(li)
（3）切片删除
#del li # li = ['alex',[1,2,3],'wusir','egon','女神','taibai'] # del li[0:2]#切片删除 # print(li)
4.改
1 # li[0] = '男神' 2 # li[0] = [1,2,3] 3 #切片 4 # li[0:3] = '云姐hahhakdkald' 5 # li[0:3] = [1,2,3,'春哥','泰格'] 6 # print(li)
5.查
# for i in li: # print(i) # print(li[0:2])
6.公共发方法
1 # l = len(li) 2 # print(l) 3 # num=li.count('taibai') 4 # print(num) 5 # print(li.index('wusir')) 6 7 # li = [1,4,2,6,3] 8 #正序排序 9 # li.sort() 10 # print(li) 11 #反向排序 12 # li.sort(reverse=True) 13 # print(li) 14 #反转 15 # li.reverse() 16 # print(li)
7.列表嵌套
1 li = ['taibai','武藤兰','苑昊',['alex','egon',89],23] 2 # print(li[1][1]) 3 # print(li[0].capitalize()) 4 # name=li[0].capitalize() 5 # li[0]=name 6 # print(li) 7 # li[2]='苑日天' 8 # print(li) 9 # li[2]=li[2].replace('昊','日天') 10 # print(li) 11 li[3][0]=li[3][0].upper() 12 print(li)li = ['taibai','武藤兰','苑昊',['alex','egon',89],23] 13 # print(li[1][1]) 14 # print(li[0].capitalize()) 15 # name=li[0].capitalize() 16 # li[0]=name 17 # print(li) 18 # li[2]='苑日天' 19 # print(li) 20 # li[2]=li[2].replace('昊','日天') 21 # print(li) 22 li[3][0]=li[3][0].upper() 23 print(li)
3.元祖相关内容
1.元祖基础操作
1 #元祖 只读列表 ，可循环查询，可切片 2 #儿子不能改，孙子可能可以改 3 # 4 # tu = (1,2,3,'alex',[2,3,4,'taibai'],'egon') 5 # print(tu[3]) 6 # print(tu[0:4]) 7 # for i in tu: 8 # print(i) 9 # tu[4][3]=tu[4][3].upper() 10 # print(tu) 11 # tu[4].append('sb') 12 # print(tu)
2.字符连接
1 # s='alex' 2 #字符连接 3 # s1='_'.join(s) 4 # print(s1)
3.list——>str
str——>list
#列表转化成字符串 list——>str join # li = ['alex', 'wusir', 'egon', '女神', 'taibai'] # s = '####'.join(li) # # #str——>list split() # print(s)
4.range
1 #range 2 # for i in range(0,100): 3 # print(i) 4 # for i in range(100): 5 # # print(i) 6 # for i in range(0,100,3): 7 # print(i) 8 # for i in range(100,0,-2): 9 # print(i) 10 # for i in range(100,-1,-2): 11 # print(i)
5,打印列表元素，并且打印元素是列表里的元素
1 li=[1,2,3,5,'alex',[2,3,4,5,'alex'],'afds'] 2 # 3 # for i in li: 4 # if type(i)==list: 5 # for j in i: 6 # print(j) 7 # else: 8 # print(i) 9 for i in range(len(li)): 10 if type(li[i]) == list: 11 for j in li[i]: 12 print(j) 13 else: 14 print(li[i]) 15 # for i in li: 16 # if type(i) == list: 17 # for k in i: 18 # print(k) 19 # else:print(i)