Python的配置文件

---

配置文件

setting.ini文件是一个纯文本

[DataBase1]

username = admin

passwors = root

[DataBase2]

hostname = 127.0.0.1

port = 3306

这是一般配置文件的常见的格式，[]里面叫做Section部分的名称，整个[]以及下面的每一项（每一个key=value，叫做Option）都是一个Section区域

Python读取配置文件

#引入依赖库，Python2.x引入ConfigParser Python3.x引入configparser

try:

    import ConfigParser as cReader

except Exception as reason:

    import configparser as cReader

要实现的功能

# -*- coding:utf-8 -*-

"""

    自定义配置文件读取库

    调用ConfigParser，只实现常用功能，作为学习ConfigParser和自用库

"""

#引入依赖库，Python2.x引入ConfigParser Python3.x引入configparser

import json

try:

    import ConfigParser as cReader

except Exception as reason:

    import configparser as cReader

#定义类和函数

class ConfigChannel:

    """建立配置读取类"""

    def __init__(self, configFile):

        """建立ConfigChannel对象"""

        try:

            self.configFile = configFile

            self.channel = cReader.SafeConfigParser()

            self.channel.read(open(configFile))

        except Exception as reason:

            raise

    def getOption(self, Section, Option):

        """获取某区域的某一项配置"""

        try:

            return self.channel.getfloot(Section, Option)

        except Exception as reason:

            try:

                return self.channel.getint(Section, Option)

            except Exception as reason:

                try:

                    return self.channel.getboolean(Section, Option)

                except Exception as reason:

                    return self.channel.get(Section, Option)

    def hasOption(self, Section, Option):

        """判断是否存在这个Option"""

        try:

            return self.channel.has_option(Section, Option)

        except Exception as reason:

            raise

    def showOptions(self):

        """展示所有Options"""

        try:

            return self.channel.options()

        except Exception as reason:

            raise

    def setOption(self, Section, Option, Value):

        """会写或增加配置某区域某一项配置"""

        try:

            self.channel.set(Section, Option, Value)

            self.channel.write(open(self.configFile, "w"))

        except Exception as reason:

            raise

    def rmvOption(self, Section, Option):

        """删除某一个配置项"""

        try:

            self.channel.remove_option(Section, Option)

            self.channel.write(open(self.configFile, "w"))

        except Exception as reason:

            raise

    def hasSection(self, Section):

        """判断是否存在这个Section"""

        try:

            return self.channel.has_section(Section)

        except Exception as reason:

            raise

    def showOptions(self):

        """展示所有Sections"""

        try:

            return self.channel.sections()

        except Exception as reason:

            raise

    def addSection(self, Section):

        """增加一个配置区域"""

        try:

            self.channel.add_section(Section)

            self.channel.write(open(self.configFile, "w"))

        except Exception as reason:

            raise

    def rmvSection(self, Section):

        """删除一个配置区域"""

        try:

            self.channel.remove_section(Section)

            self.channel.write(open(self.configFile, "w"))

        except Exception as reason:

            raise

    def getConfigFromString(self, string):

        """从字符串读取配置并写入"""

        try:

            _dictionary = json.loads(string)

            return self.getConfigFromDictionary(_dictionary)

        except Exception as reason:

            pass

        try:

            configList = string.split(":")

            if len(configList) != 3 or '' in configList:

                raise Exception

            Section = configList[0]

            Option = configList[1]

            Value = configList[2]

            if self.hasSection(Section):

                self.setOption(Section, Option, Value)

            else:

                self.addSection(Section)

                self.setOption(Section, Option, Value)

        except Exception as reason:

            raise

    def getConfigFromDictionary(self, dictionary):

        """从字典读取配置并写入"""

        if not isinstance(dictionary, dict):

            raise

        try:

            for key in dictionary:

                if not isinstance(dictionary.get(key), dict):

                    continue

                if not self.channel.hasSection(key):

                    self.addSection(key)

                for subkey in dictionary[key]:

                    self.channel.setOption(key, subkey,

                                           dictionary[key][subkey])

        except Exception as reason:

            raise