Python讀寫properties文件

 Python讀寫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) #讀取文件 props.put('key_a', 'value_a') #修改/添加key=value print props.get('key_a') #根據key讀取value print "props.has_key('key_a')=" + str(props.has_key('key_a')) #判斷是否包含該key

參考： 
Python實用腳本（1）：讀取Properties文件

 

Python實用腳本（1）：讀取Properties文件

(2013-04-19 20:39:52)

轉載▼

標簽： it

分類： Python

JAVA本身提供了對於Properties文件操作的類，項目中的很多配置信息都是放在了 Properties文件。但是Python並沒有提供操作Properties文件的庫，所以，自己動手寫個一個可以加載Properties文件的腳本。

 

class Properties:

    fileName = ''

 

    def __init__(self, fileName):

        self.fileName = fileName

 

    def getProperties(self):   

    try:

    pro_file = open(self.fileName, 'r')

       properties = {}

       for line in pro_file:

           if line.find('=') > 0:

               strs = line.replace('\n', '').split('=')

               properties[strs[0]] = strs[1]

    except Exception, e:

    raise e

    else:

    pro_file.close()

        return properties

 

實際調用：

fileName = sys.path[0] + '\\'+ 'system.properties'

p = Properties(fileName)

properties = p.getProperties()

print properties[Key]