{"id":2932,"date":"2017-12-03T18:16:54","date_gmt":"2017-12-03T10:16:54","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=2932"},"modified":"2017-12-03T18:16:54","modified_gmt":"2017-12-03T10:16:54","slug":"%e5%ae%9e%e7%8e%b0python%e8%bf%9e%e6%8e%a5mysqln%e4%bb%a5%e5%8f%8a%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/python\/%e5%ae%9e%e7%8e%b0python%e8%bf%9e%e6%8e%a5mysqln%e4%bb%a5%e5%8f%8a%e5%ba%94%e7%94%a8\/","title":{"rendered":"\u5b9e\u73b0Python\u8fde\u63a5Mysqln\u4ee5\u53ca\u5e94\u7528"},"content":{"rendered":"

\u5b9e\u73b0Python\u8fde\u63a5Mysqln\u4ee5\u53ca\u5e94\u7528<\/p>\n

python \u8fde\u63a5mysql\u6570\u636e\u5e93\uff0c\u662fpython\u5e94\u7528\u7684\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6a21\u5757\uff0cPytho\u8fde\u63a5Mysqln\u9700\u8981\u8fde\u63a5\u5bfc\u5165python\u7684mysql\u6a21\u5757\uff0c\u901a\u8fc7python\u8fde\u63a5\u6570\u636e\u5e93\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u672c\u5730\u7684\u8d44\u6e90\u72b6\u6001\u5b9e\u73b0\u5b9e\u65f6\u76d1\u63a7\u3002<\/p>\n

 <\/p>\n

1\u3001\u9996\u5148\u6211\u4eec\u9700\u8981\u5148\u5b89\u88c5MySQL\u6a21\u5757<\/strong><\/p>\n

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[root@centos\u00a0mem]<\/code>#\u00a0yum\u00a0\u00a0install\u00a0\u00a0MySQL-python\u00a0\u00a0\u00a0-y<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2\u3001\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u53ef\u4ee5\u76f4\u63a5\u811a\u672c\u4e86<\/strong><\/p>\n

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[root@centos\u00a0pytonjiaoben]<\/code>#\u00a0cat\u00a0mysql.py\u00a0<\/code><\/div>\n
import<\/code>\u00a0MySQLdb\u00a0\u00a0as\u00a0\u00a0mysql\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>###\u8fd9\u662f\u5bfc\u5165\u00a0MySQL-python\u6a21\u5757<\/code><\/div>\n
con\u00a0=\u00a0mysql.connect(user=<\/code>\"root\"<\/code>,\u00a0<\/code>passwd<\/code>=<\/code>\"123456\"<\/code>,\u00a0\\<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>db=<\/code>\"mem\"<\/code>,\u00a0host=<\/code>\"127.0.0.1\"<\/code>)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>###\u8fde\u63a5\u672c\u5730\u7684\u6570\u636e\u5e93mem\uff0c\u6307\u5b9a\u6570\u636e\u5e93\u7684\u540d\u79f0\uff0c\u4e3b\u673a\u5730\u5740\uff0c\u7528\u6237\u540d\u548c\u5bc6\u7801<\/code><\/div>\n
con.autocommit(True)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>###\u8bbe\u7f6e\u4e3a\u81ea\u52a8\u63d0\u4ea4\u6a21\u5f0f\uff0c\u8868\u793a\u628a\u6bcf\u4e00\u4e2a\u67e5\u8be2\u64cd\u4f5c\uff0c\u4f5c\u4e3a1\u4e2a\u72ec\u7acb\u7684\u4e8b\u52a1\u5904\u7406\uff0c\u9a6c\u4e0a\u6267\u884c<\/code><\/div>\n
cur\u00a0=\u00a0con.cursor()\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>###\u521b\u5efa1\u4e2a\u6e38\u6807\u5bf9\u8c61<\/code><\/div>\n
for<\/code>\u00a0i\u00a0<\/code>in<\/code>\u00a0range(10):\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>###\u8fd9\u91cc\u505a\u4e2afor\u5faa\u73af\u5199\u5165\u6570\u636e<\/code><\/div>\n
\u00a0\u00a0\u00a0<\/code>sql\u00a0=\u00a0<\/code>'insert\u00a0into\u00a0mem\u00a0values(%d,\u00a0\"user%d\")'<\/code>%(i,i)\u00a0\u00a0\u00a0<\/code>###\u5b9a\u4e49sql\u8bed\u53e5<\/code><\/div>\n
\u00a0\u00a0\u00a0<\/code>cur.execute(sql)\u00a0\u00a0\u00a0\u00a0<\/code>##\u6267\u884csql\u8bed\u53e5<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6ce8\u610f\uff1a<\/strong><\/p>\n

##\u6570\u636e\u5e93\u548c\u6570\u636e\u8868\u5fc5\u987b\u662f\u4f60\u5148\u521b\u5efa\u7684\uff0c\u800c\u4e14mysql\u4e00\u5b9a\u8981\u8bbe\u7f6e\u5bc6\u7801\u624d\u884c\u3002<\/strong><\/p>\n

3\u3001\u6267\u884c\u7ed3\u679c<\/strong><\/p>\n

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mysql>\u00a0<\/code>select<\/code>\u00a0*\u00a0from\u00a0mem;<\/code><\/div>\n
+------+---------+<\/code><\/div>\n
|\u00a0<\/code>id<\/code>\u00a0\u00a0\u00a0|\u00a0name\u00a0\u00a0\u00a0\u00a0|<\/code><\/div>\n
+------+---------+<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a00\u00a0|\u00a0user0\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a01\u00a0|\u00a0user1\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a02\u00a0|\u00a0user2\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a03\u00a0|\u00a0user3\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a04\u00a0|\u00a0user4\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a05\u00a0|\u00a0user5\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a06\u00a0|\u00a0user6\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a07\u00a0|\u00a0user7\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a08\u00a0|\u00a0user8\u00a0\u00a0\u00a0|<\/code><\/div>\n
|\u00a0\u00a0\u00a0\u00a09\u00a0|\u00a0user9\u00a0\u00a0\u00a0|<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5f53\u6211\u4eec\u6267\u884c\u811a\u672c\u540e\uff0c\u6211\u4eec\u53d1\u73b0\u6570\u636e\u5df2\u7ecf\u5199\u5f97\u6570\u636e\u5e93\u91cc\u9762\u4e86<\/p>\n

4\u3001\u73b0\u5728\u6211\u4eec\u53ef\u80fd\u4f1a\u6709\u7591\u95ee\uff0c\u8fd9\u6837\u5199\u8fdb\u53bb\u53c8\u6709\u4ec0\u4e48\u7528\uff0c\u90a3\u597d\uff0c\u6211\u4eec\u63a5\u7740\u5199\u4e2a\u811a\u672c\uff0c\u5173\u4e8emysql\u7684\u5e94\u7528\u7684\u3002\u73b0\u5728\u6211\u4eec\u5bf9\u670d\u52a1\u5668\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u5199\u5165\u5230mysql\u4e0a\uff0c\u5199\u5f97mysql\u4e0a\u5c31\u53ef\u4ee5\u901a\u8fc7flask\u8c03\u7528\uff0c\u5b9e\u73b0\u5bf9\u672c\u5730\u8d44\u6e90\u5b9e\u73b0\u76d1\u63a7\u3002<\/strong><\/p>\n

\u6211\u4eec\u67e5\u770b\u4e00\u4e0b\u6211\u4eec\u5185\u5b58\u6587\u4ef6<\/p>\n

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[root@centos\u00a0pytonjiaoben]<\/code>#\u00a0cat\u00a0\/proc\/meminfo\u00a0<\/code><\/div>\n
MemTotal:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01528700\u00a0kB<\/code><\/div>\n
MemFree:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0224072\u00a0kB<\/code><\/div>\n
Buffers:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0130432\u00a0kB<\/code><\/div>\n
Cached:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0604432\u00a0kB<\/code><\/div>\n
SwapCached:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a08440\u00a0kB<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

6\u3001\u7f16\u5199\u811a\u672c\uff0c\u83b7\u53d6\u5185\u5b58\u7684\u4f7f\u7528\u91cf<\/strong><\/p>\n

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[root@centos\u00a0pytonjiaoben]<\/code>#\u00a0cat\u00a0mem\/mysql.py\u00a0<\/code><\/div>\n
#\u00a0-*-\u00a0coding:utf-8\u00a0-*-<\/code><\/div>\n
import<\/code>\u00a0time<\/code><\/div>\n
import<\/code>\u00a0os<\/code><\/div>\n
import<\/code>\u00a0MySQLdb\u00a0as\u00a0mysql<\/code><\/div>\n
db\u00a0=\u00a0mysql.connect(user=<\/code>\"root\"<\/code>,\u00a0<\/code>passwd<\/code>=<\/code>\"123456\"<\/code>,\u00a0db=<\/code>\"memory\"<\/code>,\u00a0host=<\/code>\"localhost\"<\/code>)<\/code><\/div>\n
db.autocommit(True)<\/code><\/div>\n
cur=db.cursor()<\/code><\/div>\n
def\u00a0saveMem():\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>##\u83b7\u53d6memory\u7684total\u3001free\u3001buff\u7684\u91cf<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>a=<\/code>\"awk\u00a0'NR==1{print\u00a0$2}'\u00a0\/proc\/meminfo\"<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>file<\/code>\u00a0=\u00a0os.popen(a)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>total=int(<\/code>file<\/code>.<\/code>read<\/code>())<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>b=<\/code>\"awk\u00a0'NR==2{print\u00a0$2}'\u00a0\/proc\/meminfo\"<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>file<\/code>\u00a0=os.popen(b)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>free<\/code>\u00a0=int(<\/code>file<\/code>.<\/code>read<\/code>())<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>c=<\/code>\"awk\u00a0'NR==3{print\u00a0$2}'\u00a0\/proc\/meminfo\"<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>file<\/code>\u00a0=\u00a0os.popen(c)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>buffer\u00a0=int(<\/code>file<\/code>.<\/code>read<\/code>())<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>d=<\/code>\"awk\u00a0'NR==4{print\u00a0$2}'\u00a0\/proc\/meminfo\"<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>file<\/code>\u00a0=os.popen(d)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>cache\u00a0=int(<\/code>file<\/code>.<\/code>read<\/code>())<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>mem_used=total-<\/code>free<\/code>-buffer-cache<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>print\u00a0mem_used<\/code>\/1024<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>#mem\u00a0=\u00a0mem_used\/1024\u00a0\u00a0<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>cur_time\u00a0=\u00a0int(<\/code>time<\/code>.<\/code>time<\/code>())<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>sql\u00a0=\u00a0<\/code>'insert\u00a0into\u00a0memory\u00a0(memory,\u00a0time)\u00a0value\u00a0(%s,%s)'<\/code>%(mem_used,cur_time)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>cur.execute(sql)<\/code><\/div>\n
while<\/code>\u00a0True:<\/code><\/div>\n
saveMem()<\/code><\/div>\n
time<\/code>.<\/code>sleep<\/code>(1)\u00a0\u00a0\u00a0<\/code>#\u00a0sleep\u00a01\u00a0second<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

7\u3001\u67e5\u770b\u7ed3\u679c<\/strong><\/p>\n

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[root@centos\u00a0pytonjiaoben]<\/code>#\u00a0python\u00a0\u00a0mem\/mysql.py\u00a0<\/code><\/div>\n
562<\/code><\/div>\n
563<\/code><\/div>\n
563<\/code><\/div>\n
563<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

###\u67e5\u770b\u6570\u636e\u5e93<\/p>\n

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mysql>\u00a0<\/code>select<\/code>\u00a0*\u00a0from\u00a0\u00a0memory;<\/code><\/div>\n
+--------+------------+<\/code><\/div>\n
|\u00a0memory\u00a0|\u00a0\u00a0\u00a0<\/code>time<\/code>\u00a0\u00a0\u00a0\u00a0\u00a0|<\/code><\/div>\n
+--------+------------+<\/code><\/div>\n
|\u00a0577012\u00a0|\u00a01511869204\u00a0|<\/code><\/div>\n
|\u00a0577004\u00a0|\u00a01511869205\u00a0|<\/code><\/div>\n
|\u00a0576872\u00a0|\u00a01511869206\u00a0|<\/code><\/div>\n
+--------+------------+<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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