{"id":184,"date":"2020-05-23T18:59:47","date_gmt":"2020-05-23T10:59:47","guid":{"rendered":"https:\/\/www.stusc.com\/?p=184"},"modified":"2020-05-23T18:59:47","modified_gmt":"2020-05-23T10:59:47","slug":"python%e5%ad%a6%e4%b9%a0%e6%89%93%e5%8d%a1%ef%bc%88%e5%9b%9b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.stusc.com\/?p=184","title":{"rendered":"Python\u5b66\u4e60\u6253\u5361\uff08\u56db\uff09"},"content":{"rendered":"\n
\u2014\u2014\u5217\u8868\u7684\u5e38\u89c4\u64cd\u4f5c\u65b9\u6cd5<\/h5>\n\n\n\n

\u4e0d\u53ef\u5426\u8ba4\uff0c\u5728Python\u4e2d\uff0c\u5bf9\u5217\u8868\u5143\u7d20\u7684\u64cd\u4f5c\u975e\u5e38\u91cd\u8981\uff0c\u5176\u4e2d\u5e38\u89c4\u64cd\u4f5c\u65b9\u6cd5\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n\n\n\n

list() <\/h4>\n\n\n\n

list()\u53ef\u4ee5\u7528\u6765\u5c06\u5b57\u4e32\u8f6c\u6362\u4e3a\u5b57\u7b26\u5217\u8868<\/p>\n\n\n\n

tempstr = list(‘stts’)
print(tempstr)<\/p>\n\n\n\n

\u8fd0\u884c\u7ed3\u679c\uff1a['s', 't', 't', 's']<\/pre>\n\n\n\n
\u7ed9\u5217\u8868\u8d4b\u503c<\/h4>\n\n\n\n
tempstr[2] = ‘u’
print(tempstr)<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a['s', 't', 'u', 's']<\/pre>\n\n\n\n
\u5220\u9664\u5143\u7d20<\/h4>\n\n\n\n
del tempstr[3]
print(tempstr)
print(len(tempstr))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a['s', 't', 'u']\uff0c3<\/pre>\n\n\n\n
\u5207\u7247\u5f0f\u8d4b\u503c<\/h4>\n\n\n\n
tempstr[2:] = list(‘sc’)
print(tempstr)
print(len(tempstr))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a['s', 't', 's', 'c']\uff0c4<\/pre>\n\n\n\n
tempstr[-1:] = list(‘sc’)
print(tempstr)
print(len(tempstr))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a['s', 't', 's', 's', 'c']\uff0c5<\/pre>\n\n\n\n
tempstr[:] = list(‘stus’)
print(tempstr)
print(len(tempstr))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a['s', 't', 'u', 's']\uff0c4<\/pre>\n\n\n\n
append()\u8ffd\u52a0\u8bb0\u5f55\u3002<\/h4>\n\n\n\n
tempstr.append(‘c’)
print(tempstr)<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a['s', 't', 'u', 's', 'c']<\/pre>\n\n\n\n
clear(),\u6e05\u7a7a\u5217\u8868\u5185\u5bb9<\/h4>\n\n\n\n
tempstr.clear()
print(len(tempstr))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a0<\/pre>\n\n\n\n
\u597d\u50cf\u5207\u7247\u5168\u90e8\u8d4b\u7a7a\u503c\u4e5f\u80fd\u5b9e\u73b0\u540c\u6837\u6548\u679c\uff1atempstr[:] = []<\/p>\n\n\n\n
\u5217\u8868\u540d\u79f0\u5173\u8054<\/h4>\n\n\n\n
\u4e0b\u9762\u8fd9\u79cd\u64cd\u4f5c\u5c31\u662f\u5c06tempstr2\u8fd9\u4e2a\u5217\u540d\u4e0etempstr\u8fd9\u4e2a\u5217\u540d\u76f8\u5173\u8054\uff0c\u5373\u540c\u4e00\u5806\u6808\u6709\u4e24\u4e2a\u540d\u79f0\uff0c\u64cd\u4f5c\u4efb\u4f55\u4e00\u4e2a\u5217\u8868\u540d\uff0c\u53e6\u5916\u4e00\u4e2a\u540c\u65f6\u53d1\u751f\u53d8\u5316\u3002<\/p>\n\n\n\n
tempstr2 = tempstr
tempstr2[:] = list(‘stusc’)
print(‘tempstr\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a’ + str(tempstr)) <\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a['s', 't', 'u', 's', 'c']<\/pre>\n\n\n\n
print(‘tempstr2\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a’ + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr2\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a['s', 't', 'u', 's', 'c']<\/pre>\n\n\n\n
copy()\u5217\u8868\u590d\u5236<\/h4>\n\n\n\n
\u4f7f\u7528copy()\u5bf9\u5217\u8868\u8fdb\u884c\u590d\u5236\uff0c\u4f7f\u5176\u6307\u5411\u4e24\u4e2a\u4e0d\u540c\u7684\u6808\u3002<\/p>\n\n\n\n
tempstr2 = tempstr.copy()
del tempstr2[-1]
print(‘tempstr\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a’ + str(tempstr)) <\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a['s', 't', 'u', 's', 'c']<\/pre>\n\n\n\n
print(‘tempstr2\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a’ + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr2\u5217\u8868\u7684\u5185\u5bb9\u4e3a\uff1a['s', 't', 'u', 's']<\/pre>\n\n\n\n
count()\u5143\u7d20\u8ba1\u6570<\/h4>\n\n\n\n
count()\u8fd4\u56de\u7684\u662f\u4e2aint\u503c\u3002PS\uff1a\u53ef\u4ee5\u901a\u8fc7str()\u5c06int\u7c7b\u578b\u8f6c\u6362\u4e3astring\u578b<\/p>\n\n\n\n
hm = tempstr.count(‘s’)
print(“‘s’\u8fd9\u4e2a\u5143\u7d20\u5728tempstr\u8fd9\u4e2a\u5217\u8868\u4e2d\u603b\u5171\u51fa\u73b0\u4e86” + str(hm) +’\u6b21’)<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a's'\u8fd9\u4e2a\u5143\u7d20\u5728tempstr\u8fd9\u4e2a\u5217\u8868\u4e2d\u603b\u5171\u51fa\u73b0\u4e862\u6b21<\/pre>\n\n\n\n
extend()\u6570\u636e\u8ffd\u52a0<\/h4>\n\n\n\n
tempstr2.extend(tempstr)
print(‘tempstr2\u540e\u9762\u8ffd\u52a0tempstr\u540e\u7684\u7ed3\u679c\u4e3a\uff1a’ + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr2\u540e\u9762\u8ffd\u52a0tempstr\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['s', 't', 'u', 's', 's', 't', 'u', 's', 'c']<\/pre>\n\n\n\n
index()\u7d22\u5f15<\/h4>\n\n\n\n
\u7d22\u5f15\u67d0\u4e00\u5143\u7d20\u5728\u5217\u8868\u4e2d\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e<\/p>\n\n\n\n
hm = tempstr2.index(‘u’)
print(“\u5b57\u7b26’u’\u5728tempstr2\u4e2d\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\u4e3a” + str(hm) + ‘\u53f7\u4f4d’)<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a\u5b57\u7b26'u'\u5728tempstr2\u4e2d\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\u4e3a2\u53f7\u4f4d<\/pre>\n\n\n\n
insert(int,val)\u63d2\u5165\u5143\u7d20<\/h4>\n\n\n\n
\u5728\u5217\u8868\u4e2d\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n
tempstr2.insert(4,’c’)
print(“\u5728tempstr2\u4e2d4\u53f7\u4f4d\u4e0a\u63d2\u5165c\u540e\u7684\u7ed3\u679c\u4e3a\uff1a” + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a\u5728tempstr2\u4e2d4\u53f7\u4f4d\u4e0a\u63d2\u5165c\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['s', 't', 'u', 's', 'c', 's', 't', 'u', 's', 'c']<\/pre>\n\n\n\n
pop()\u5220\u9664\u5143\u7d20<\/h4>\n\n\n\n
pop(int)\u4ece\u6307\u5b9a\u5217\u8868\u4e2d\u5220\u51fa\u67d0\u4e2a\u5143\u7d20(int\u4e3a\u7a7a\u65f6\u9ed8\u8ba4\u5220\u9664\u6700\u540e\u4e00\u4e2a\uff09\uff0c\u5e76\u8fd4\u56de\u8be5\u5143\u7d20\u503c\u3002PS\uff1a\u636e\u8bf4pop()\u662f\u552f\u4e00\u4e00\u4e2a\u5e26\u8fd4\u56de\u7684\u5217\u8868\u64cd\u4f5c\u65b9\u6cd5\u3002<\/p>\n\n\n\n
print(“\u5728tempstr2\u4e2d\u5220\u9664\u6700\u540e\u4e00\u4e2a\u5143\u7d20” + str(tempstr2.pop()) +”\u7684\u7ed3\u679c\u4e3a\uff1a” + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a\u5728tempstr2\u4e2d\u5220\u9664\u6700\u540e\u4e00\u4e2a\u5143\u7d20c\u7684\u7ed3\u679c\u4e3a\uff1a['s', 't', 'u', 's', 'c', 's', 't', 'u', 's']<\/pre>\n\n\n\n
print(“\u5728tempstr2\u4e2d\u5220\u9664\u7b2c3\u4e2a\u5143\u7d20” + str(tempstr2.pop(3)) +”\u7684\u7ed3\u679c\u4e3a\uff1a” + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a\u5728tempstr2\u4e2d\u5220\u9664\u7b2c3\u4e2a\u5143\u7d20s\u7684\u7ed3\u679c\u4e3a\uff1a['s', 't', 'u', 'c', 's', 't', 'u', 's']<\/pre>\n\n\n\n
remove(val)<\/h4>\n\n\n\n
\u4ece\u6307\u5b9a\u5217\u8868\u4e2d\u5220\u9664\u9996\u6b21\u51fa\u73b0\u7684\u6307\u5b9a\u5143\u7d20\u3002<\/p>\n\n\n\n
tempstr2.remove(‘s’)
print(“\u5728tempstr2\u4e2d\u9996\u6b21\u5220\u9664’s’\u5143\u7d20\u540e\u7684\u7ed3\u679c\u4e3a\uff1a” + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a\u5728tempstr2\u4e2d\u9996\u6b21\u5220\u9664's'\u5143\u7d20\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['t', 'u', 'c', 's', 't', 'u', 's']<\/pre>\n\n\n\n
tempstr2.remove(‘s’)
print(“\u5728tempstr2\u4e2d\u518d\u6b21\u5220\u9664’s’\u5143\u7d20\u540e\u7684\u7ed3\u679c\u4e3a\uff1a” + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1a\u5728tempstr2\u4e2d\u518d\u6b21\u5220\u9664's'\u5143\u7d20\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['t', 'u', 'c', 't', 'u', 's']<\/pre>\n\n\n\n
reverse()\u53cd\u5411\u6392\u5e8f<\/h4>\n\n\n\n
\u5c06\u6307\u5b9a\u5217\u8868\u5185\u7684\u5143\u7d20\u53cd\u5411\u6392\u5e8f\u3002<\/p>\n\n\n\n
tempstr2.reverse()
print(‘tempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528reverse()\u8fdb\u884c\u53cd\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a’ + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528reverse()\u8fdb\u884c\u53cd\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['s', 'u', 't', 'c', 'u', 't']<\/pre>\n\n\n\n
sort()\u5143\u7d20\u6392\u5e8f<\/h4>\n\n\n\n
\u5c06\u6307\u5b9a\u5217\u8868\u5185\u7684\u5143\u7d20\u8fdb\u884c\u81ea\u52a8\u6392\u5e8f\u3002<\/p>\n\n\n\n
tempstr2.sort()
print(‘tempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528sort()\u8fdb\u884c\u6392\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a’ + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528sort()\u8fdb\u884c\u6392\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['c', 's', 't', 't', 'u', 'u']<\/pre>\n\n\n\n
\u65b9\u6cd5sort\u63a5\u53d7\u4e24\u4e2a\u53ef\u9009\u53c2\u6570\uff1akey\u548creverse\u3002\u8fd9\u4e24\u4e2a\u53c2\u6570\u901a\u5e38\u662f\u6309\u540d\u79f0\u6307\u5b9a\u7684\uff0c\u79f0\u4e3a\u5173\u952e\u5b57\u53c2\u6570\uff0c\u5c06\u5728\u7b2c6\u7ae0\u8be6\u7ec6\u8ba8\u8bba\u3002\u53c2\u6570key\u7c7b\u4f3c\u4e8e\u53c2\u6570cmp\uff1a\u4f60\u5c06\u5176\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u7528\u4e8e\u6392\u5e8f\u7684\u51fd\u6570\u3002\u7136\u800c\uff0c\u4e0d\u4f1a\u76f4\u63a5\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\u6765\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u6bd4\u53e6\u4e00\u4e2a\u5143\u7d20\u5c0f\uff0c\u800c\u662f\u4f7f\u7528\u5b83\u6765\u4e3a\u6bcf\u4e2a\u5143\u7d20\u521b\u5efa\u4e00\u4e2a\u952e\uff0c\u518d\u6839\u636e\u8fd9\u4e9b\u952e\u5bf9\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002\u56e0\u6b64\uff0c\u8981\u6839\u636e\u957f\u5ea6\u5bf9\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\uff0c\u53ef\u5c06\u53c2\u6570key\u8bbe\u7f6e\u4e3a\u51fd\u6570len\u3002<\/p>\n\n\n\n
tempstr2.sort(key=len)
print(‘tempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528sort(key=len)\u8fdb\u884c\u6392\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a’ + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528sort(key=len)\u8fdb\u884c\u6392\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['c', 's', 't', 't', 'u', 'u']<\/pre>\n\n\n\n
tempstr2.sort(reverse=True)
print(‘tempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528sort(reverse=Ture)\u8fdb\u884c\u6392\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a’ + str(tempstr2))<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\uff1atempstr2\u5217\u8868\u5185\u5143\u7d20\u4f7f\u7528sort(reverse=Ture)\u8fdb\u884c\u6392\u5e8f\u540e\u7684\u7ed3\u679c\u4e3a\uff1a['u', 'u', 't', 't', 's', 'c']<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u4e0d\u53ef\u5426\u8ba4\uff0c\u5728Python\u4e2d\uff0c\u5bf9\u5217\u8868\u5143\u7d20\u7684\u64cd\u4f5c\u975e\u5e38\u91cd\u8981\uff0c\u5176\u4e2d\u5e38\u89c4\u64cd\u4f5c\u65b9\u6cd5\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u79cd<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[33,50],"class_list":{"0":"post-184","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-tech","7":"tag-python","8":"tag-50","9":"h-entry","11":"h-as-article"},"_links":{"self":[{"href":"https:\/\/www.stusc.com\/index.php?rest_route=\/wp\/v2\/posts\/184","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stusc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stusc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stusc.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stusc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=184"}],"version-history":[{"count":0,"href":"https:\/\/www.stusc.com\/index.php?rest_route=\/wp\/v2\/posts\/184\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.stusc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stusc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=184"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stusc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}