Python：解析properties文件

原博客： Python读写properties文件

import re
import os
import tempfile

class Properties:

def __init__(self, file_name):
self.file_name = file_name
self.properties = {}
try:
fopen = open(self.file_name, 'r')
for line in fopen:
line = line.strip()
if line.find('=') > 0 and not line.startswith('#'):
strs = line.split('=')
self.properties[strs[0].strip()] = strs[1].strip()
except Exception, e:
raise e
else:
fopen.close()

def has_key(self, key):
return key in self.properties

def get(self, key, default_value=''):
if key in self.properties:
return self.properties[key]
return default_value

def put(self, key, value):
self.properties[key] = value
replace_property(self.file_name, key + '=.*', key + '=' + value, True)

def parse(file_name):
return Properties(file_name)

def replace_property(file_name, from_regex, to_str, append_on_not_exists=True):
tmpfile = tempfile.TemporaryFile()

if os.path.exists(file_name):
r_open = open(file_name, 'r')
pattern = re.compile(r'' + from_regex)
found = None
for line in r_open:
if pattern.search(line) and not line.strip().startswith('#'):
found = True
line = re.sub(from_regex, to_str, line)
tmpfile.write(line)
if not found and append_on_not_exists:
tmpfile.write('\n' + to_str)
r_open.close()
tmpfile.seek(0)

content = tmpfile.read()

if os.path.exists(file_name):
os.remove(file_name)

w_open = open(file_name, 'w')
w_open.write(content)
w_open.close()

tmpfile.close()
else:
print "file %s not found" % file_name

使用方式：

file_path = 'xxx.properties'
props = property.parse(file_path)   #读取文件
props.put('key_a', 'value_a')       #修改/添加key=value
print props.get('key_a')            #根据key读取value
print "props.has_key('key_a')=" + str(props.has_key('key_a'))   #判断是否包含该key