py实现对json配置文件的读写访问

最新推荐文章于 2025-05-05 22:06:16 发布

原创最新推荐文章于 2025-05-05 22:06:16 发布 · 911 阅读

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#python #json

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该博客介绍了如何使用Python实现对JSON配置文件的读写操作。通过定义一个名为`CliConf`的类，实现了加载、获取、设置配置项以及保存到文件的功能。示例中展示了从`cliconf.json`加载配置，更新并保存配置到文件的过程。

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#! /usr/bin/pytdon
# -*- coding:utf-8 -*- 

'''
配置管理 - 以json的形式存放配置
可以方便地进行获取和设备json格式的配置文件
'''
import json

class 
CliConf:
'''
usage: cliconf = CliConf()
cliconf.load(filename)
# try to get config
setting1 = cliconf["key1"]
setting2 = cliconf["key2"]
# try to recover setting
cliconf["key2"] = "NewValue"
cliconf.write() # save to file
'''
def 
__init__(self):
self._conf_ = {}
self.conf =
dict( filename =
'cliconf.json' )

def 
__getattr__(self, name):
return self.conf.get(name)
def 
__getitem__(self, name):
return self.conf.get(name)
def 
__setitem__(self, name, val):
self.conf[name] 
= val

def 
get(self, name, defv=None):
val = self.conf.get(name)
if not val:
if defv:
val = defv
self.conf[name] 
= defv
return val
def 
setConf(self, mp):
if isinstance(mp,
dict):
self.conf.update(mp)

def 
load(self, fna = 
None):
if fna:
self.conf["filename"]
= fna
try:
fil = None
print("Load Conf File[%s]"%self.conf["filename"])
fil = open(self.conf["filename"],
'r')
self.conf.update(json.load(fil))
except:
pass
finally:
fil and fil.close()

def 
save(self, fna = 
None):
if fna:
self.conf["filename"]
= fna
try:
fil = None
fil = open(self.conf["filename"],
'w')
json.dump(self.conf, fil, indent=4)
except BaseException,e:
print e
finally:
fil and fil.close()

config = CliConf()
config.load()

if __name__ ==
"__main__":
cli = CliConf()
print( ' -- ' )
cli.load()

print(cli["vvv"])
cli.ipaddr6 = 
99
cli.setConf( {"ipaddr2": 
"windowns"} )
cli["nitem"] 
= "i am newitem"
cli.save()