Python - 微嵌 - KnowledgeBase

项目相关笔记：

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1.实时输出文本框输入的内容信息

self.Text = wx.TextCtrl(panel, -1, "content", size=(length, width), pos=(x, y))

self.Bind(wx.EVT_TEXT, self.OnText, self.Text)

def OnText(self, event):

print(self.Text.GetValue())

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2.为数据库SQLite3传入变量参数：

以insert插入为例：

cursor.execute("insert into catalog values('" + Variable1+ "', '" + Variable2+ "', ......)")

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3.SQLite中为标题目录中的主键设置自增功能：

首先创建数据库：

data = sqlite3.connect('data.db')

为该数据库创建游标：

cu = data.cursor()

创建数据库标题目录（其中id integer PRIMARY KEY autoincrement即：自动递增主键）：

cu.execute(""" create table catalog ( id integer PRIMARY KEY autoincrement ) """)

然后再insert插入时，将该字段设为NULL，即可由引擎自动设定其值，引擎会设定为最大的rowid+1。当然，也可以设置为非NULL的数字来自己指定这个值，但这样就必须自己小心，不要引起冲突。当这个rowid的值大于所能表达的最大值 9223372036854775807 （3.0及以后版本的rowid最大值）后，rowid的新值会这个最大数之前随机找一个没被使用了的值。所以在rowid达到最大值前，rowid的值是严格单调增加的。

参考：http://www.cnblogs.com/zhw511006/archive/2010/09/08/1821596.html

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4、如何用一个shell脚本文件打开一个新的terminal终端，并运行程序：

脚本如下：

gnome-terminal -t " Title " -x bash -c " ShellCommand ;exec bash;" &
-t 为打开终端的标题，便于区分。
-x 后面的为要在打开的终端中执行的脚本，根据需要自己修改就行了。
最后的exec bash;是让打开的终端在执行完脚本后不关闭。

同时，要想关闭所有终端窗口，执行：

killall gnome-terminal (此命令会关闭所有终端，慎用)

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5、关于OpenBTS-2.6.0部分结构功能文件的注解：

首次接入网络，发送“Welcome to OpenBTS!”欢迎短信的模块：

路径：/usr/local/src/openbts-2.6.0Mamou/Control/中的MobilityManagement.cpp文件268行左右。

首次接入网络后，BTS所接收到的手机IMSI码存放的文件：

路径：/usr/local/src/openbts-2.6.0Mamou/apps/中的TMSITable.txt文件

首次接入网络后，手机所收到的短信信息内容设置，以及频点ARFCN设置所在的配置文件：

路径：/usr/local/src/openbts-2.6.0Mamou/apps/中的OpenBTS.config文件

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6. kal-v0.4编译源码出错,解决方法：

make clean

make distclean

./bootstrap

./configure

make

kal可进行OpenBTS通讯频点测试，其常见测试频点命令：

./kal -s GSM900 -R A

./kal -c 频点号

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7、读取已打开文件的指定行数的字符内容：

import linecache

linecache.getline('3_2.txt',linecount)

注意：在使用此功能函数过程中可能会遇到一个问题，就是当在python脚本中对linecache.getline执行循环读取操作时，当已打开文件指定行数字符内容发生变化时，用linecache.getline读到的内容却不变且依然维持第一次读取的结果，这是由于linecache的缓存没有清除的缘故，所以在用linecache之前清除一下缓存就好了（CMD：linecache.clearcache()）。

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8、字符串切割：

string = 'Everything is gonna be alright!'

print(string[23:]) 结果: alright!

print(string[:21]) 结果: Everything

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9、configparser模块处理ini配置文件
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10、

杀死进程：os.system('kill '+processNum)

删除文件： os.remove('~DeleteFilePath~')

用Python执行终端命令：os.system("command")

wx.choice控件得到其选项位置及内容：

# Display the position of the selection

print self.choice.GetSelection()

# Display the selection

print self.choice.GetStringSelection()

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11、shell判断文件是否存在，若存在则删除：

假设文件名为test.txt 位置是/opt/test.txt

#/bin/bash
if [ -f /opt/test.txt ] 
      then
      rm -rf /opt/test.txt
      else
      echo "This file is not exist."

fi

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12、Python判断文件及文件夹是否存在：

import os

os.path.isfile('test.txt') #如果不存在就返回False
os.path.exists(directory) #如果目录不存在就返回False

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13、Linux中在指定目录的所有文件中查找特定的字符串：

比如在/var/log中查找“test”：

方法一：使用find的exec选项

find /var/log –exec grep –nH “test” {} \;

方法二：使用find和xarg

find /var/log | xargs grep -nH "test"

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14、IMSI共有15位，其结构如下： 
　　MCC+MNC+MSIN

MCC：Mobile Country Code，移动国家码，MCC的资源由国际电联（ITU）统一分配和管理，唯一识别移动用户所属的国家，共3位，中国为460;

MNC:Mobile Network Code，移动网络码，2~3位，中国移动系统使用00、02、07，中国联通GSM系统使用01，中国电信CDMA系统使用03，
一个典型的IMSI号码为460030912121001;

 
MSIN:Mobile Subscriber Identification Number, 
移动用户识别号码,共有10位，其结构如下： 
　　EF+M0M1M2M3+ABCD 
其中的M0M1M2M3和MDN号码中的H0H1H2H3可存在对应关系，ABCD四位为自由分配。 
可以看出IMSI在NMSI号码前加了MCC，可以区别出每个用户的来自的国家，因此可以实现国际漫游。
在同一个国家内，如果有多个移动网络运营商，可以通过MNC来进行区别. 

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区别于IMEI：International Mobile Equipment Identity 
（国际移动设备标识）

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15、flush() 是把缓冲区的数据强行输出, 主要用在IO中，即清空缓冲区数据，一般在读写流(stream)的时候，
数据是先被读到了内存中，再把数据写到文件中，当你数据读完的时候不代表你的数据已经写完了，
因为还有一部分有可能会留在内存这个缓冲区中。
这时候如果你调用了close()方法关闭了读写流，那么这部分数据就会丢失，所以应该在关闭读写流之前先flush()。

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16、在配置vim时，首先将vim.tar.gz解压至root目录，且将.vimrc复制到root目录并将第15行变量set directory路径改为/root/.vim/tmp_file后，用vim打开文件，出现如下提示：Exuberant ctags (http://ctags.sf.net) not found in PATH. Plugin is not loaded
解决方法：
The bug depends on the vim plugin "taglist". The plugin requirers the"Exuberant ctags" wich you can download at http://ctags.sf.net.
After you have unziped it, you have to add the ctags location to the PATH variable, or set the Tlist_Ctags_Cmd variable in the .
vimrc file (http://vim-taglist.sourceforge.net/manual.html#%27Tlist_Ctags_Cmd%27). e.g.
Windows: let Tlist_Ctags_Cmd = 'd:\tools\ctags.exe' 
Unix: let Tlist_Ctags_Cmd = '/usr/local/bin/ctags' 
Now restart Vim and the message shouldnt pop up again
即：安装ctags,并在.vimrc中补充
" let Tlist_Ctags_Cmd = '/usr/local/bin/ctags'  "
然后重启vim，在normal状态下输入"wm"，会出现修改后的效果。

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17、终端提示没有“Python.h”头文件：解决方法：安装头文件及静态库包：
sudo apt-get install python-dev

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18、默认网关设置：给网络配置网关则需要用到route命令，设置网关的命令格式是：
# route add default gw 网关地址
例子：网关IP为192.168.1.10
# route add default gw 192.168.1.10
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19、项目代码调试之打印遍历函数名及所在行数：在每个函数中添加：printf("[%s.%d]\n", __FUNCTION__,__LINE__);
可跟踪函数运行次序，如若出现bug，可及时反馈所在函数及其行数位置。

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20、在MobilityManagement.cpp中120~128行

添加内容：

短信计数且将计数结果存于路径位于：/usr/local/src/openbts-2.6.0Mamou/apps/的count.txt文件。

在apps/OpenBTS.cpp 中326行往后：

Socket_server的实现

同时添加了一个server.c的客户端文件，可实现通过编译后的./server ‘’命令控制OpenBTS>命令行的设置命令。

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21、

在apps/中添加了cutIMSI.sh文件：

用于解析TMSITable.txt文件中的IMSI码，并将码值存入blacklist.txt中，方便SIP/SIPEngine.cpp文件第154行的fopen()读取。

在SIP/SIPEngine.cpp文件149~188行：

读取黑名单IMSI，若为空则继续注册，若有值则与注册过的IMSI码作对比，并使之踢出网络不得登陆。

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22、

在CLI/CLI.cpp文件中420~435行：

添加了一个设置频点的函数int arfcn(int argc , char** argv , ostream& os, istream& is),方便通过openbts>命令行方式设置频点ARFCN。

在start.sh中实现：

开启四个终端并运行OpenBTS，并将其四个终端的进程信息重定向至一个文件中，以便message.py运行时读取每个进程号在需要时Kill掉中终端。

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23、

在reboot.sh中实现：

重新启动smqueue及OpenBTS。

在install.sh 中实现：

将MobilityManagement.cpp及OpenBTS.config替换到源码相关所在位置，对OpenBTS源码进行重新编译。

在run.sh中实现：

运行message.py且对前一次生成数据库进行清除。

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