#str常用操作name="eric"re=name.__contains__("ri")print("name中是否含有ri：",re)l=len(name)print("name的长度为：",l)re1=name.capitalize()print("name的首字母大写：",re1)re2=re1.casefold()print("将首字母由大写变小写：",re2)re3=name.center(20,"*")print("字符总长度为20，name放在中间：",re3)lname="Ericericri"re4=lname.count("ri")print("ri出现的次数为：",re4)re5=lname.startswith("E")print("lname是不是以E开头的：",re5)re6=lname.endswith("r")print("lname是不是以R结尾：",re6)re7=lname.find("ri")#找不到返回-1print("ri所在位置是：",re7)re8=lname.index("ri")#找不到抛出异常，报错print("ri所在位置是：",re8)rname="alex {0} as {1}"re9=rname.format("sh","eric")print("字符串格式化：",re9)li=["a","l","e","x","s","b"]re10="".join(li)print("li的连接是：",re10)re11=name.ljust(10,"*")print("输出name，不足部分右侧用*号填充：",re11)ree=name.rjust(10,"*")print("输出name,不足部分左侧用*号填充：",ree)name1=‘alexissb‘re12=name1.partition("is")print("字符串分割为元组：",re12)re13=name1.replace("e","AAA")print("replace字符串替换：",re13)print(name.center(60,"*"))#list常用操作li=[1,2,3]li.extend([11,22,])print(‘li扩展后为：‘,li)li.append(99)print("li追加后为：",li)li.insert(2,"aass")print("在第三个位置插入元素：",li)ret=li.pop(3)print("删除第4个位置上的元素：",li)print("删除的元素为：",ret)print("返回某一元素值得索引：",li.index(22))ll=[11,22,33,11]ll.remove(11)#只能删除第一个print("删除列表中的11：",ll)ll.reverse()print("翻转后为：",ll)

#动态增加字典l2=[11,22,33,55,66,77,88,99]dict2={}for i in l2:    if(i<=66):        if("k1" in dict2.keys()): #若存在键k1，则追加，否则创建            dict2["k1"].append(i)        else:            dict2["k1"]=[i,]    else:        if("k2" in dict2.keys()):            dict2["k2"].append(i)        else:            dict2["k2"]=[i,]print(dict2)