{"id":1026,"date":"2018-07-26T12:53:22","date_gmt":"2018-07-26T04:53:22","guid":{"rendered":"http:\/\/www.sniper97.cn\/?p=1026"},"modified":"2018-07-26T12:53:22","modified_gmt":"2018-07-26T04:53:22","slug":"%e7%ac%ac%e5%85%ad%e8%8a%82%ef%bc%9a%e6%95%b0%e6%8d%ae%e5%ad%98%e5%82%a8","status":"publish","type":"post","link":"http:\/\/www.sniper97.cn\/index.php\/note\/carwler\/1026\/","title":{"rendered":"\u7b2c\u516d\u8282\uff1a\u6570\u636e\u5b58\u50a8"},"content":{"rendered":"

\u672c\u9875\u4ee3\u7801\u53ef\u4ee5\u5728\u8fd9\u91cc<\/a>\u4e0b\u8f7d\u3002<\/p>\n

1.\u6587\u4ef6\u5b58\u50a8<\/h3>\n

\uff081\uff09txt\u6587\u672c\u5b58\u50a8<\/h4>\n

r\uff1a \u4ee5\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00\u6587\u4ef6\u3002
\nrb\uff1a\u4ee5\u4e8c\u8fdb\u5236\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\nr+\uff1a\u4ee5\u8bfb\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\nrb+\uff1a\u4ee5\u4e8c\u8fdb\u5236\u8bfb\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\nw\uff1a\u4ee5\u5199\u5165\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\nwb\uff1a\u4ee5\u4e8c\u8fdb\u5236\u5199\u5165\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\nw+\uff1a\u4ee5\u8bfb\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\nwb+\uff1a\u4ee5\u4e8c\u8fdb\u5236\u8bfb\u5199\u683c\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\na\uff1a\u4ee5\u8ffd\u52a0\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\nab\uff1a\u4ee5\u4e8c\u8fdb\u5236\u8ffd\u52a0\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002
\na+:\u4ee5\u8bfb\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\uff0c\u8ffd\u52a0\u3002
\nab+\uff1a\u4ee5\u4e8c\u8fdb\u5236\u8ffd\u52a0\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u3002<\/p>\n

\uff082\uff09JSON\u6587\u4ef6\u5b58\u50a8<\/h4>\n

JSON\u5168\u79f0JavaScript Object Notation \u5373JavaScript\u5bf9\u8c61\u6807\u8bb0\uff0c\u5b83\u901a\u8fc7\u5bf9\u8c61\u548c\u6570\u7ec4\u7684\u7ec4\u5408\u6765\u8868\u793a\u6570\u636e\uff0c\u6784\u9020\u7b80\u6d01\u4f46\u662f\u7ed3\u6784\u5316\u7a0b\u5ea6\u975e\u5e38\u9ad8\uff0c\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u4ea4\u6362\u683c\u5f0f\u3002
\n\u8bfb\u53d6JSON<\/p>\n

# json test -> read\nstr = '''\n[{\n    \"name\": \"Sniper\",\n    \"gender\": \"male\"\n    },{\n    \"name\": \"spider\",\n    \"gender\": \"male\"\n    }]\n'''\ndata = json.loads(str)\nprint(data)\nprint(data[0]['name'])\nprint(data[0].get('age'))<\/pre>\n
\u8f93\u51fa\uff1a
\n\"\"
\n\u8f93\u51faJSON\uff1a<\/p>\n
# json test -> output to file\nstr = '''\n[{\n    \"name\": \"Sniper\",\n    \"gender\": \"male\"\n    },{\n    \"name\": \"spider\",\n    \"gender\": \"male\"\n    }]\n'''\nwith open('file\/json\/data.json', 'w') as file:\n    file.write(json.dumps(str,ensure_ascii=False))\n<\/pre>\n
\u5728\u6587\u4ef6\u4e2d\u53ef\u4ee5\u770b\u5230\u8f93\u51fa\uff1a
\n\"\"
\n <\/p>\n
\uff083\uff09CSV\u6587\u4ef6\u5b58\u50a8<\/h4>\n
\u5168\u79f0 Comma-Separated Balues \u5373\u9017\u53f7\u5206\u9694\u503c\u6216\u5b57\u7b26\u5206\u5272\u503c\uff0c\u5176\u6587\u4ef6\u4ee5\u7eaf\u6587\u672c\u5f62\u5f0f\u5b58\u50a8\u3002
\n\u5199\u5165\uff1a<\/p>\n
# csv test -> write\nwith open('file\/csv\/data.csv', 'w') as f:\n    writer = csv.writer(f, delimiter=' ')\n    writer.writerow(['id', 'name', 'age'])\n    writer.writerow(['10001', 'Mike', '20'])\n    writer.writerows([['10002', 'Bob', '22'], ['10003', 'Jordan', '24']])<\/pre>\n
\u8f93\u51fa\uff1a
\n\"\"
\n\u4ee5\u5b57\u5178\u7684\u5f62\u5f0f\u5199\u5165\uff1a<\/p>\n
# csv test -> write with dic\nwith open('file\/csv\/data.csv', 'w', newline='') as f:\n    fieldnames = ['id', 'name', 'age']\n    writer = csv.DictWriter(f, fieldnames=fieldnames)\n    writer.writeheader()\n    writer.writerow({'id': '10004', 'name': 'Davie', 'age': '26'})<\/pre>\n
\u8f93\u51fa\uff1a
\n\"\"
\n\u8bfb\u53d6\uff1a<\/p>\n
# csv test -> load file\nwith open('file\/csv\/data.csv', 'r' ,encoding='utf-8') as f:\n    reader = csv.reader(f)\n    for row in reader:\n        print(row)<\/pre>\n
\u8f93\u51fa\uff1a
\n\"\"<\/p>\n
2.\u6570\u636e\u5e93<\/h3>\n
\uff081\uff09MongoDB\u5b58\u50a8<\/h4>\n
\u4ed6\u662f\u4e00\u79cd\u4f7f\u7528C++\u7f16\u5199\u7684\u4e00\u4e2a\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u662f\u4e00\u4e2a\u57fa\u4e8e\u5206\u5e03\u5f0f\u6587\u4ef6\u5b58\u50a8\u7684\u5f00\u6e90\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u5176\u5185\u5bb9\u5b58\u50a8\u5f62\u5f0f\u7c7b\u4f3cJSON\u5bf9\u8c61\u3002
\n\u67e5\u8be2\uff1a
\n\u5728\u8fd9\u4e4b\u524d\u522b\u5fd8\u4e86\u5230\u8ba1\u7b97\u673a\u7ba1\u7406\u4e2d\u628aMongoDB\u670d\u52a1\u6253\u5f00\uff08\u5982\u679c\u4e4b\u524d\u66f4\u6539\u8fc7\u624b\u52a8\u7684\u8bdd\uff09\u3002
\n\"\"
\n\u7136\u540e\u6211\u4eec\u6253\u5f00Robo 3T \u6211\u4eec\u8fd9\u91cc\u4f7f\u7528\u4ee5\u524d\u505a\u9898\u5e93\u7684\u65f6\u5019\u7684\u6570\u636e\u5e93\uff0c\u627e\u4e00\u4e2a\u5173\u952e\u5b57\u6765\u67e5\u8be2\u3002
\n\"\"<\/p>\n
# mongodb test -> read\nclient = pymongo.MongoClient(host='localhost', port=27017)  # connect to DB\ndb = client.quiz                # choose DB\ncollection = db.quizzes         # choose collection\nresult = collection.find_one({'quiz': '\u6211\u56fd\u5386\u53f2\u4e0a\u7b2c\u4e00\u90e8\u7f16\u5e74\u4f53\u53f2\u4e66\u662f\uff1f'})   # find data\nprint(result)\n<\/pre>\n
\u53d1\u73b0\u53ef\u4ee5\u67e5\u8be2\u51fa\u6765\uff1a
\n\"\"
\n\u6bd4\u8f83\u7b26\u53f7\uff1a
\n\u7b26\u53f7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u542b\u4e49\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u793a\u4f8b
\n&lt \u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5c0f\u4e8e \u00a0 \u00a0 \u00a0\u00a0 \uff5b’age’: {‘&lt’: 20}\uff5d
\n&gt\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5927\u4e8e\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \uff5b’age’: {‘&gt’: 20}\uff5d
\n&lte\u00a0\u00a0\u00a0\u00a0\u00a0 \u5c0f\u4e8e\u7b49\u4e8e\u00a0 \uff5b’age’: {‘&lte’: 20}\uff5d
\n&gte\u00a0\u00a0 \u5927\u4e8e\u7b49\u4e8e\u00a0\u00a0\u00a0 \uff5b’age’: {‘&gte’: 20}\uff5d
\n&ne\u00a0\u00a0\u00a0 \u4e0d\u7b49\u4e8e\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \uff5b’age’: {‘&ne’: 20}\uff5d
\n&in\u00a0\u00a0\u00a0 \u5728\u8303\u56f4\u5185\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \uff5b’age’: {‘&in’: [20, 23]}\uff5d
\n&nin\u00a0 \u4e0d\u518d\u8303\u56f4\u5185\u00a0\u00a0\u00a0 \uff5b’age’: {‘&nin’: [20, 23]}\uff5d
\n\u53e6\u5916\uff0c\u8fd8\u53ef\u4ee5\u8fdb\u884c\u6b63\u5219\u5339\u914d\uff0c\u4f8b\u5982\u67e5\u8be2\u540d\u5b57\u4ee5M\u5f00\u5934\u7684\u5b66\u751f\u6570\u636e\uff1a
\nresults = collection.find(\uff5b’name’: {‘&regex’: ‘^M.*’}\uff5d)
\n\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u7684\u529f\u80fd\u7b26\u53f7\uff0c\u6bd4\u5982&exists \u5b58\u5728\u3001&type \u5224\u65ad\u7c7b\u578b\u3001&mod \u6a21\u64cd\u4f5c\u3001&text \u6587\u672c\u67e5\u8be2\u3001&where \u9ad8\u7ea7\u6761\u4ef6\u67e5\u8be2
\n 
\n\u63d2\u5165\u6570\u636e\uff1a
\n\u8c03\u7528collection.insert( )
\n\u53ef\u4ee5\u4ee5\u5217\u8868\u7684\u5f62\u5f0f\u63d2\u5165\u591a\u4e2a\u503c\u3002
\n 
\n\u8ba1\u6570\uff1a
\ncount = collection.find().count()
\n 
\n\u6392\u5e8f\uff1a
\ncount = collection.find().sort(‘name’, pymongo.ASCENDING)\u00a0\u00a0\u00a0\u00a0 \u5347\u5e8f
\ncount = collection.find().sort(‘name’, pymongo.DESCENDING)\u00a0\u00a0\u00a0 \u964d\u5e8f
\n 
\n\u504f\u79fb\uff1a
\ncount = collection.find().skip\uff082\uff09\u5ffd\u7565\u7ed3\u679c\u96c6\u7684\u524d\u4e24\u4e2a\u5143\u7d20
\ncount = collection.find().limit\uff082\uff09 \u53ea\u663e\u793a\u524d\u4e24\u4e2a\u5143\u7d20
\n 
\n\u66f4\u65b0\uff1a
\ncount = collection.update\uff08collection \uff0cnewData\uff09
\n\u8fd8\u6709updata_one\uff08\uff09 \u3001updata_many\uff08\uff09\u65b9\u6cd5\u3002
\n 
\n\u5220\u9664\uff1a
\ncount = collection.remove\uff08\uff09
\n\u540c\u6837\uff0c\u8fd8\u6709remove_one() \u548c\u00a0 remove_many()\u65b9\u6cd5\u3002
\n <\/p>\n
\uff082\uff09Redis \u5b58\u50a8<\/h4>\n
Redis\u662f\u4e00\u4e2a\u57fa\u4e8e\u5185\u5b58\u7684\u9ad8\u6548\u7684\u952e\u503c\u578b\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u5b58\u53d6\u6548\u7387\u6781\u9ad8\uff0c\u800c\u4e14\u652f\u6301\u591a\u79cd\u5b58\u50a8\u6570\u636e\u7ed3\u6784\uff0c\u4f7f\u7528\u4e5f\u975e\u5e38\u7b80\u5355\u3002
\n\u5b58\u53d6\uff1a
\n\u5728\u8fd9\u4e4b\u524d\u522b\u5fd8\u4e86\u5f00\u542f\u670d\u52a1\u3002<\/p>\n
# Redis test\nredis = StrictRedis(host='localhost', port=6379, db=0, password='')\nredis.set('name', 'Bob')\nprint(redis.get('name'))\n<\/pre>\n
\u8fd0\u884c\u7ed3\u679c\uff1a
\n\"\"
\n\u540c\u65f6\u5728\u53ef\u89c6\u5316\u754c\u9762\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u5230db0\u4e2d\u589e\u52a0\u4e86\u8be5\u6570\u636e\u3002\"\"
\n\u952e\u64cd\u4f5c\uff1a
\n\u5b57\u7b26\u4e32\u64cd\u4f5c\uff1a
\n\u5217\u8868\u64cd\u4f5c\uff1a
\n\u96c6\u5408\u64cd\u4f5c\uff1a
\n\u6709\u5e8f\u96c6\u5408\u64cd\u4f5c\uff1a
\n\u6563\u5217\u64cd\u4f5c\uff1a
\n 
\n 
\n 
\n 
\n 
\n.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u672c\u9875\u4ee3\u7801\u53ef\u4ee5\u5728\u8fd9\u91cc\u4e0b\u8f7d\u3002 1.\u6587\u4ef6\u5b58\u50a8 \uff081\uff09txt\u6587\u672c\u5b58\u50a8 r\uff1a \u4ee5\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00\u6587\u4ef6\u3002 rb\uff1a\u4ee5\u4e8c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[12],"tags":[],"views":2433,"_links":{"self":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/1026"}],"collection":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1026"}],"version-history":[{"count":0,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/1026\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1026"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}