[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fh8oD4J051NaPOvh4ZZJ_QMPTT5K6POtVbMYDT27gfko":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2025-06-06 15:39:29",195386055,[8,9,10,11],"length()","index()","count()","find()",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},20,"44c3b509c563ea809405a7c6dc6002c2","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd318fe1b022a054e4ad01f419609f28e.jpg","Python程序设计","work_42007773","第四章 字符串","下列方法中,能够返回某个子串在字符串中出现次数的是( )",[21,33,42,51,60,69,78,87,90,99],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2025-06-06 15:39:28",195386019,[26,27,28,29],"i=len(s)","i=len(s)-1","i=len(s)+1","都不对","输入一个字符串s,反向输出它,例如输入"abc",输出"bca"s=input()__________while i>=0: print(s[i],end="")print()","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],195386024,[37,38,39,40],"c.isDigit()","c.Digit()","c.IsDigit()","c.isdigit()","题目:输入一行字符,分别统计出其中英文字母、空格、数字和其它字符的个数.'''需求:输入一行字符,分别统计出其中英文字母、空格,数字和其他字符的个数.思路:利用while语句,条件为输入的字符'''s = input('input a string:')letters = 0space = 0digit = 0others = 0for c in s: if c.isalpha(): letters += 1 elif c.isspace(): space += 1 elif _________: digit += 1 else: others += 1print('char = %d, space = %d,digit = %d,others = %d' % (letters,space,digit,others))",{"answer":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],195386028,[46,47,48,49],"st.insert(s)","st.add(s)","st.append(s)","s.append(st)","输入学生姓名,增加到一个列表st中,直到输入的姓名为空为止,最后输出st.s=[]while True: s=input() if s!="": __________ else: breakprint(st)",{"answer":52,"createTime":5,"id":53,"options":54,"question":59,"source":31,"type":32},[],195386035,[55,56,57,58],"\\","\u002F","#","%","当需要在字符串中使用特殊字符时,Python使用( )作为转义字符的起始符号",{"answer":61,"createTime":5,"id":62,"options":63,"question":68,"source":31,"type":32},[],195386039,[64,65,66,67],"'ab'","'''perface'''",""52wo"","abc","下列数据中,不属于字符串的是( )",{"answer":70,"createTime":5,"id":71,"options":72,"question":77,"source":31,"type":32},[],195386046,[73,74,75,76],"%c","%f","%d","%s","使用( )符号对浮点类型的数据进行格式化",{"answer":79,"createTime":5,"id":80,"options":81,"question":86,"source":31,"type":32},[],195386050,[82,83,84,85],"1","2","3","4","字符串'Hi,Andy'中,字符'A'对应的下标位置为( )",{"answer":88,"createTime":5,"id":6,"options":89,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":91,"createTime":5,"id":92,"options":93,"question":98,"source":31,"type":32},[],195386058,[94,95,96,97],"capitalize","title","upper","ljust","下列方法中,能够让所有单词的首字母变成大写的方法是( )",{"answer":100,"createTime":5,"id":101,"options":102,"question":107,"source":31,"type":32},[],195386061,[103,104,105,106],"删除字符串头尾指定的字符","删除字符串末尾指定的字符","删除字符串头部指定的字符","通过指定分隔符对字符串切片","字符串的strip方法的作用是( )"]