dic2 = {'k1': "v1", "k2": "v2", "k3": [11,22,33]} # for k in dic2.keys(): #     print(k) # # for  k in dic2.values(): #     print(k) # for k,w in dic2.items(): #     print(k,w)                  # 循环输出所有的k  和 v # d 请在字典中添加一个键值对，"k4": "v4"，输出添加后的字典 # dic2["k4"] = "v4" # print(dic2) # dic2.setdefault("k5",'v5') # print(dic2) # e. 请在修改字典中 "k1" 对应的值为 "alex"，输出修改后的字典 # dic2["k1"]= "alex" # print(dic2) # dic3={"k1":"balex"} # dic2.update(dic3) # print(dic2) # f 请在k3对应的值中追加一个元素 44，输出修改后的字典 # dic2["k3"].append(44) # print(dic2) # dic2["k3"]=[11,22,33,55] # print(dic2) # g 请在k3对应的值的第 1 个位置插入个元素 18，输出修改后的字典 # dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]} # # dic2['k3']= [18,11,22,33] # # print(dic2) # dic2["k3"].insert(0,19)     # 字典的插入.insert # print(dic2) # # 4、处理成字典 {'k':1,'k1':2....} # st = "k:1|k1:2|k2:3|k3:4" # dic={} # lis = st.split("|") # # print(lis)      # ['k:1', 'k1:2', 'k2:3', 'k3:4'] # for d in lis: #     el = d.split(":") #     # print(el)       #  ['k', '1'] #     dic[el[0]]= int(el[1]) # print(dic)