#1：请用代码实现：利用下划线将列表的每一个元素拼接成字符串 # li = ["alex","eric","rain"] # '_'.join(li)
#2:查找列表中元素，移除每个元素的空格，并查找以A或a开头并且以c结尾的所有元素# li = ['alec','aric','Alex','
Tony','rain']# tu = ('alec','aric','Alex',' Tony','rain') # dic =
{'k1':'alex','k2':' aric','k3':'Alex','k4':'Tony'}# for index,i in
enumerate(li):# i = i.strip() # li[index] = i # if i.endswith('c') and
(i.startswith('a') or i.startswith('A')):# print(i) # print(li) #
print("------------------------------------")# # for i in tu: # i = i.strip() #
if i.endswith('c') and (i.startswith('a') or i.startswith('A')):# print(i) #
print(tu)# print("------------------------------------") # # for index,i in
enumerate(dic):# dic[i] = dic[i].strip() # if dic[i].endswith('c') and
(dic[i].startswith('a') or dic[i].startswith('A')):# print(i) # print(dic) #
print("------------------------------------") #3：有如下列表，按照要求实现每一个功能 # li =
['alex','eric','rain']# #计算列表长度并输出 # print(len(li)) # #列表中追加一个元素，并输出添加后的列表 #
li.append('brues')# print(li) # #在指定位置插入元素 # li.insert(1,"blues") # #修改指定元素 #
li[2] = 'Kelly'# #删除指定元素 # del li[1] # del li[2:4] # print(li) # #将列表的所有元素反转 #
li.reverse()# print(li) # #输出索引及元素 # for index,i in enumerate(li): #
print(index,i) #4:有如下列表，按照需求实现功能 # li =
['hello','secen',['non',['h','kelly'],'all'],123,446]# #请根据索引输出指定的元素 #
print(li[2][1][1])# #找到指定元素并且修改 # li[2][2] = 'ALL' #5；有如下元组，请按照要求实现指定功能 # tu =
('alex','eric','rain')# #计算长度 # print(len(tu)) # #获取指定元素 # print(tu[1:2]) # #输出
# for index,i in enumerate(tu):# print(index,i) #6:字典 # dic =
{'k1':'v1','k2':'v2','k3':'v3','k4':'v4','k5':[123,4234,24]}# #输出所有的key和value #
for i in dic.keys():# print(i,end=' ') # print(dic[i]) # #追加 # dic['k6'] = 'v6'
# print(dic)# dic['k5'].append(44) # dic['k5'].insert(1,18) # print(dic) #7:转换
# #将字符串转换为列表# s = 'alex' # s = list(s) # print(s) # print(tuple(s)) # #将列表转换为元组
# li = ['alex','seven']# print(tuple(li)) # #将列表转换为字典 # new_dict = {} # for
index,i in enumerate(li):# new_dict[index] = i # print(new_dict) #8:按要求创建字典 #
li = [11,22,33,44,55,66,77,88,99]# new_dict = {'k1':[],'k2':[]} # for index,i
in enumerate(li):# if i >=66: # new_dict['k1'].append(i) # else: #
new_dict['k2'].append(i)# print(new_dict) #9:乘法表 # for i in range(1,10): # for
j in range(1,i+1):# print("%s * %s"%(i,j),end=' ') # print('\n')