{"rsdb":{"rid":"314500","subhead":"","postdate":"0","aid":"227664","fid":"77","uid":"1","topic":"1","content":"
\n

3.9\u5404\u7c7b\u578b\u6570\u636e\u65b9\u6cd5\u8865\u5145\uff0c\u8f6c\u6362\uff0c\u5206\u7c7b\uff0c\u7f16\u7801\uff0c\u5751\u4e2d\u83dc<\/h2> \n

3.9.1\u6570\u636e\u7c7b\u578b\u65b9\u6cd5\u8865\u5145<\/h3> \n

1.str\uff1a\u4e0d\u53ef\u53d8<\/h4> \n

\u8865\u5145\u65b9\u6cd5<\/h5> \n
    \n

  1. s1.capitalize():\u9996\u5b57\u6bcd\u5927\u5199<\/p> 

    s1 = "alex"\ns2 = s1.capitalize()\nprint(s1)<\/code><\/pre><\/li> \n  
  2. s1.title(): \u6bcf\u4e2a\u5355\u8bcd\u9996\u5b57\u6bcd\u5927\u5199<\/p> 
    s1 = "alex wusir"\nprint(s1.title())<\/code><\/pre><\/li> \n  
  3. s1.swapcase():\u5927\u5c0f\u5199\u53cd\u8f6c<\/p> 
    s1 = "AlEx"\nprint(s1.swapcase())<\/code><\/pre><\/li> \n  
  4. s1.center():\u5c45\u4e2d -- \u586b\u5145<\/p> 
    s1 = "alex"\nprint(s1.center(20,"-"))<\/code><\/pre><\/li> \n  
  5. s1.find()\u67e5\u627e,\u4ece\u5de6\u5411\u53f3\uff0c\u53ea\u67e5\u627e\u4e00\u4e2a\uff0c\u4e0d\u5b58\u5728\u8fd4\u56de\u2018-1\u2019<\/p> 
    s1.index():\u67e5\u627e\u4e0d\u5b58\u5728\u7684\u62a5\u9519<\/p> 
    #\u4e24\u79cd\u5747\u8fd4\u56de\u7b2c\u4e00\u6b21\u627e\u5230\u7684\u4e0b\u6807\ns1 = "alex"\nprint(s1.find("a"))\nprint(s1.index('e'))<\/code><\/pre><\/li> \n  
  6. \u62fc\u63a5'_'.join(s1)(\u5217\u8868\u4e2d\u5fc5\u987b\u5168\u662f\u53ef\u8fed\u4ee3\u5bf9\u8c61)<\/p> 
    s1 = "al3x"\nprint("_.jion(s1)")<\/code><\/pre><\/li> \n <\/ol> \n 
    2.list:<\/h4> \n 
    2.1\u5b9a\u4e49\u65b9\u5f0f\uff1alist("123")(\u53ef\u8fed\u4ee3)<\/h5> \n 
    2.2\u2018+\u2019 \u2018*\u2019 \u5f00\u8f9f\u65b0\u7a7a\u95f4<\/h5> \n 
    2.3\u8865\u5145\u5176\u4ed6\u65b9\u6cd5\uff1a<\/h5> \n 
       \n  
    1. list1.sort()\u6392\u5e8f(\u5347\u5e8f)<\/p><\/li> \n  
    2. \u964d\u5e8f<\/p> \n   
         \n    
      1. list1.reverse()(\u53cd\u8f6c)<\/li> \n    
      2. list1.sort(reverse=True)<\/li> \n   <\/ol> 
        list1 = [1,12,5,6,1,63,,4,8,2,1,9]\nlist1.sort()#1.\u5347\u5e8f\nprint(list1)\n\nlist1.reverse()#2.\u53cd\u8f6c\nprint(list1)\n\nlist1.sort(reverse=True)#\u964d\u5e8f\nprint(list1)\n\n\n<\/code><\/pre><\/li> \n <\/ol> \n 
        3.tuple:<\/h4> \n 
           \n  
        1. tu = ("12")#\u6570\u636e\u7c7b\u578b\u662f()\u4e2d\u6570\u636e\u672c\u8eab\u7684\u7c7b\u578b<\/p> 
          print(type(tu))<\/p><\/li> \n  
        2. tu = (1,)<\/p> 
          print(tu)<\/p><\/li> \n  
        3. \u5143\u7ec4\u53ef\u4ee5 '+', '*',\u4e0d\u53ef\u53d8\u516c\u7528\uff0c\u53ef\u53d8\u4e5f\u516c\u7528<\/p><\/li> \n <\/ol> \n 
          4.dict<\/h4> \n 
             \n  
          1. \n   
               \n    
            1. \u5b9a\u4e49\uff1aprint(dict(k1=1,k2=2))<\/p><\/li> \n    
            2. \u968f\u673a\u5220\u9664\uff1apopitem<\/p> 
              dict1 = {'k1':1,'k2':2}\ndict1.popitem()\nprint(dict1)\nprint(dict1.popitem())#\u8fd4\u56de\u88ab\u5220\u9664\u7684\u952e\u503c\u5bf9\uff0c\u5b98\u65b9\u8bf4\u968f\u673a\u5220\u9664\uff0c\u4f46\u662f\u5b9e\u9645\u662f\u9ed8\u8ba4\u5220\u9664\u6700\u540e\u4e00\u4e2a(python<\/a>3.6)<\/code><\/pre><\/li> \n    
            3. dict1.formkeys():\u6279\u91cf\u6dfb\u52a0(\u53ef\u8fed\u4ee3\u7684\u952e\uff0c\u5171\u7528\u7684\u503c)<\/p> 
              dict1 = {}\ndict1 = dict1.fromkeys("123",[12])#\u6279\u91cf\u6dfb\u52a0\u952e\u503c\u5bf9,\u9700\u8981\u5b57\u5178\u5728\u524d\u9762\u63a5\u7740\ndict1 = dict.fromkeys("123",[12])#\u4e5f\u53ef\u4ee5\u7528dict.\nprint(dict1)\n#\u6279\u91cf\u6dfb\u52a0\u5fc5\u987b\u6709\u5b57\u5178\u5728\u524d\u9762\u63a5\u7740<\/code><\/pre><\/li> \n   <\/ol><\/li> \n <\/ol> \n 
              5.set<\/h4> \n 
                 \n  
              1. set() -- \u7a7a\u96c6\u5408<\/p><\/li> \n  
              2. {} -- \u7a7a\u5b57\u5178<\/p><\/li> \n  
              3. \u5b9a\u4e49\u96c6\u5408<\/p> 
                set('alex')#\u8fed\u4ee3\u6dfb\u52a0<\/p> 
                print(set('alex'))<\/p><\/li> \n <\/ol> \n 
                6.bool<\/h4> \n 
                ? bool\uff1a-->False<\/p> \n 
                ? 1.False<\/p> \n 
                ? 2.\u6570\u5b57\uff1a0<\/p> \n 
                ? 3.\u5b57\u7b26\u4e32\uff1a""<\/p> \n 
                ? 4.\u5217\u8868\uff1a[]<\/p> \n 
                ? 5.\u5143\u7ec4\uff1a()<\/p> \n 
                ? 6.\u5b57\u5178\uff1a{}<\/p> \n 
                ? 7.\u96c6\u5408\uff1aset()<\/p> \n 
                ? 8.\u5176\u4ed6\uff1aNone<\/p> \n 
                7.\u683c\u5f0f\u5316<\/h4> \n 
                ? 1.%s<\/p> \n 
                ? 2.f<\/p> \n 
                ? 3.s.format()#\u586b\u5145<\/p> \n 
                #\u6309\u7167\u987a\u5e8f\u4f4d\u7f6e\u586b\u5145\ns1 = "alex{},{},{}"\nprint(s.format(1,2,3)\n      \n#\u6309\u7167\u7d22\u5f15\u8fdb\u884c\u586b\u5145\ns1 = "alex{2},{0},{1}"\nprint(name.format('a','b','c'))\n\n#\u6309\u7167\u5173\u952e\u5b57\u586b\u5145\ns1 = "alex{a},{b},{c}"\nprint(name.format(a = 1, c = 3, b = 21))<\/code><\/pre> \n 
                3.9.2\u6570\u636e\u4e4b\u95f4\u8f6c\u6362<\/h3> \n 
                #str --> list\nstr1 = "alex"\nlist1 = str1.split()\n#list --> str\nlist1 = ['1','2','3']\nstr1 = ''.join(list1)\n#dict --> str\ndict1 = {'1':1}\nstr1 = str(dic)\nprint(str(dic),type(str(dic))\n#str --> dict\u76f4\u8f6c\u662f\u9519\u8bef\u7684\uff0c\u9700\u8981\u5207\u7247\u6dfb\u52a0\nprint(dict("{1:1}"))#\u9519\u8bef<\/code><\/pre> \n 
                3.9.3\u6570\u636e\u7c7b\u578b\u7ec6\u5206<\/h3> \n 
                   \n  
                1. \u53ef\u53d8\uff1alist\uff0cdict\uff0cset<\/li> \n  
                2. \u4e0d\u53ef\u53d8\uff1aint\uff0cbool\uff0cstr\uff0ctuple<\/li> \n  
                3. \u6709\u5e8f\uff1alist\uff0ctuple\uff0cstr\uff0cint\uff0cbool<\/li> \n  
                4. \u65e0\u5e8f\uff1adict\uff0cset<\/li> \n  
                5. \u53d6\u503c\u65b9\u5f0f\uff1a \n   
                     \n    
                  1. \u7d22\u5f15\uff1astr\uff0clist\uff0ctuple<\/li> \n    
                  2. \u76f4\u63a5\uff1aset\uff0cint\uff0cbool<\/li> \n    
                  3. \u952e\uff1adict<\/li> \n   <\/ol><\/li> \n <\/ol> \n 
                    3.9.4\u5751\u4e2d\u83dc<\/h3> \n 
                       \n  
                    1. \u5220\u9664list\u6b63\u786e\u5e94\u4ece\u540e\u5411\u524d\u5220<\/li> \n <\/ol> \n 
                      lst = [1,2]\nfor i in lst:\n    lst.append(3)\nprint(lst)#\u6b7b\u5faa\u73af\n\nlst = [1,2,3,4]\ncount = 0\nfor i in lst:\n    count += 1\n    lst.pop()\n    #\u8fd9\u7528\u65b9\u6cd5\u53ea\u5faa\u73af\u4e86\u4e24\u6b21\uff0c\u8f93\u51facount\u4e00\u76ee\u4e86\u7136\n    \n    #lst.pop(0)\n    print(i)\n    #\u8fd9\u79cd\u65b9\u6cd5\u4e5f\u53ea\u5faa\u73af\u4e86\u4e24\u6b21\uff0c\u8f93\u51fai\u4e00\u76ee\u4e86\u7136(i\u5728for\u5faa\u73af\u4e2d\u662f\u9012\u589e\u7684\u3002)\n    #lst.remove(i)\n    print(i)\n    #\u8fd9\u79cd\u65b9\u6cd5\u548c\u4e0a\u4e00\u79cd\u5dee\u4e0d\u591a\nprint(lst)\nprint(count)\n\n#\u6210\u529f1.\nlst = [1,2,3,4]\nfor i in range(len(lst)):\n    lst.pop()\nprint(lst)\n#\u6210\u529f2.\nlst = [1,2,3,4,5,6]\nlst1 = lst.copy()\nfor i in lst1:\n    lst.remove(i)\nprint(lst)\n<\/code><\/pre> \n 
                         \n  
                      1. \u5220\u9664\u5b57\u5178\u5751\uff1a<\/p> 
                        #\u5b57\u5178(\u548c\u96c6\u5408\uff09\u5728\u8fed\u4ee3\u7684\u8fc7\u7a0b\u4e0d\u80fd\u66f4\u6539\u952e\u503c\u5bf9\u7684\u6570\u91cf\uff0c\u53ef\u6539\u53ef\u67e5\uff0c\u53ef\u540c\u65f6\u589e\u5220\u3002\ndic = dict.fromkey("123456",1)\nfor i in dic:\n    dic.pop(i)\nprint(dic)\n\n#\u6b63\u786e\uff1a\ndic = dict.fromkey("123456",1)\ndict1 = dic.copy\nfor i in dict1:\n    dic.pop(i)\nprint(dic)\n\n#\u6b63\u786e\uff1a\u540c\u65f6\u589e\u5220\ndic = dict.fromkeys("123",1)\nprint(dic)\nfor i in dic:\n    dic.pop(i)\n    dic.setdefault(i,i)\nprint(dic)<\/code><\/pre><\/li> \n <\/ol> \n 
                        3.9.5\u4e8c\u6b21\u7f16\u7801\uff1a<\/h3> \n 
                           \n  
                        1. \u5bc6\u7801\u672c\uff1a \n   
                             \n    
                          1. ascii -- \u6ca1\u6709\u4e2d\u6587<\/li> \n    
                          2. gbk -- \u82f1\u6587 8b(\u4f4d) 1b(\u5b57\u8282) \u4e2d\u6587 16b (\u4f4d) 2b(\u5b57\u8282)<\/li> \n    
                          3. unicode -- \u82f1\u6587 16b 2b \u4e2d\u6587 32b 4b<\/li> \n    
                          4. utf -8 -- \u82f1\u6587 8b 1b \u6b27\u6d32 16b 2b \u4e9a\u6d32 24b 3b<\/li> \n   <\/ol><\/li> \n <\/ol> \n 
                            name = "alex"\nprint(name.encode("utf","orderid":"0","title":"python\u57fa\u7840\u77e5\u8bc6\u56db \u5404\u7c7b\u578b\u6570\u636e\u65b9\u6cd5\u8865\u5145\uff0c\u8f6c\u6362\uff0c\u5206\u7c7b\uff0c\u7f16\u7801+\u5751\u4e2d\u83dc(\u4e00)","smalltitle":"","mid":"0","fname":"Python","special_id":"0","bak_id":"0","info":"0","hits":"100","pages":"2","comments":"0","posttime":"2019-07-15 22:09:55","list":"1563199795","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"python<\/A> \u57fa\u7840\u77e5\u8bc6<\/A> \u7c7b\u578b<\/A> \u6570\u636e<\/A> \u65b9\u6cd5<\/A> \u8865\u5145<\/A> \u8f6c\u6362<\/A> \u5206\u7c7b<\/A> \u7f16\u7801<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"47.106.78.186","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"python\u57fa\u7840\u77e5\u8bc6\u56db \u5404\u7c7b\u578b\u6570\u636e\u65b9\u6cd5\u8865\u5145\uff0c\u8f6c\u6362\uff0c\u5206\u7c7b\uff0c\u7f16\u7801+\u5751\u4e2d\u83dc","lastview":"1713968095","digg_num":"0","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}