python 解析properties配置文件.

  一直没找到Python好用的解析properties的代码,前一阵子写python工程的时候,顺便写了一个.已打包到pypi 可用pip install pyconfiganalysis进行安装.下面是源代码:

#coding:utf-8import re,osfrom functools import reduceclass ConfigAnalysis():    def __init__(self):        self.__update_log = {}        self.__add_log = {}        self.__config = {}        self.__configfilename = None    def __validitycheck(self,lines,configfilename):        for line_number in range(len(lines)):            if (not re.match(r'^#', lines[line_number])) and (not re.match(r'^(\r\n|\r|\n)',lines[line_number])) and (not re.match(r'^[a-zA-Z0-9](\w|\.| |\t)*\=( |\t)*(\S|.)*$', lines[line_number])):                raise SyntaxError("The configuration file (%s) have SyntaxError(%s) in line %s"%(configfilename,lines[line_number],line_number+1))    def __analysisfile(self,configfilename):        with open(configfilename,'r') as Contents:            lines = Contents.readlines()        self.__validitycheck(lines,configfilename)        return [re.match(r'^[a-zA-Z0-9](\w|\.| |\t)*\=( |\t)*(\S|.)*$', line).group() for line in lines if re.match(r'^[a-zA-Z0-9](\w|\.| |\t)*\=( |\t)*(\S|.)*$', line)]    def __analysislines(self,vaild_lines):        return [re.split(r'( |\t)*\=( |\t)*',i,maxsplit=1) for i in vaild_lines]    def __genarate_config(self,key,value):        if re.match(r'^(False|None|True){1,1}$',value):            value = eval(value)        elif re.match(r'^(\d)+\.(\d)+$|^(\d)+$',re.sub(r'(\s)*$','',value)):            value = eval(value)        else:            value = re.sub(r'(\s)*$','',value)        self.__config[key]=value    def read(self,configfilename):        if os.path.exists(configfilename):            if os.path.isfile(configfilename):                _ = [self.__genarate_config(item[0],item[-1]) for item in  self.__analysislines(self.__analysisfile(configfilename))]                self.__configfilename = configfilename            else:                raise IOError('"%s" is not a file.'%configfilename)        else:            raise FileNotFoundError('No such file or directory:"%s"'%configfilename)    def keys(self):        return self.__config.keys()    def get(self,key):        try:            return self.__config[key]        except:            raise KeyError("Maping key not found.('%s')"%key)    def update(self,key,newvalue):        if re.match(r"(\S|.)*",str(newvalue)) and re.match(r"^(\S|.)*",str(newvalue)).group()==str(newvalue):            self.__update(key,newvalue)        else:            raise ValueError("Unsupported value.(Only support Non-blank characters)")    def __update(self,key,newvalue):        if key in self.__config.keys():            if self.__config[key]!=newvalue:                self.__config[key]=re.sub(r'(\s)*$','',newvalue)                self.__update_log[key]=re.sub(r'(\s)*$','',newvalue)            else:                pass        else:            raise KeyError("Maping key not found.('%s')"%key)    def add(self,key,value):        if re.match(r"(\S)*",str(value)) and re.match(r"^(\S)*",str(value)).group()==str(value):            if re.match(r'^[a-zA-Z0-9](\w|\.)*$',str(key)):                self.__add(key,value)            else:                raise KeyError("Unsupported Key.(The key must start with a number or letter and only support ['number','letter','_','.'])")        else:            raise ValueError("Unsupported value.(Only support Non-blank characters)")    def __add(self,key,value):        if key in self.__config.keys():            self.__update(key, value)        else:            self.__config[key]=re.sub(r'(\s)*$','',value)            self.__add_log[key]=re.sub(r'(\s)*$','',value)    def save(self):        with open(self.__configfilename,"r") as cfile:            clines = cfile.readlines()            for n in range(len(clines)):                for nkey in self.__update_log.keys():                    if re.match(r"^%s( |\t)*\=( ||\t)*(\S|.)*$"%nkey, clines[n]):                        clines[n]=re.sub(r"^%s( |\t)*\=( ||\t)*(\S|.)*$"%nkey, "%s = %s"%(nkey,self.__update_log[nkey]), clines[n])            if not re.match(r'.*(\r\n|\r|\n)$', clines[-1]):                clines[-1]=clines[-1]+"\n"            clines=clines+["%s = %s\n"%(nkey,self.__add_log[nkey]) for nkey in self.__add_log.keys()]        with open(self.__configfilename,"w") as wcfile:            wcfile.write(reduce(lambda x,y:x+y, clines))            if __name__=="__main__":    pass

支持默认将True,False,None,数字还原成Python变量.在配置文件中'#'号为单行注释.使用方法如下:

configanalysis.conf:

# 注释信息key1 = value1key2 =key3 = Falsekey4 = 6key5 = 0.1

创建CONFIG对象:

from pyConfigAnalysis import ConfigAnalysisCONFIG=ConfigAnalysis()CONFIG.read("configanalysis.conf")

获取所有key:

CONFIG.keys()->["key1","key2","key3","key4","key5"]

根据key获取值:

CONFIG.get("key1")->"value1"CONFIG.get("key2")->""CONFIG.get("key3")->FalseCONFIG.get("key4")->6CONFIG.get("key5")->0.1

更新和添加一个配置信息:

CONFIG.update("key1","newvalue")CONFIG.add("key6",None)#checkCONFIG.get("key1")->"newvalue"#checkCONFIG.get("key6")->

将配置信息保存到配置文件:

CONFIG.save()