本文实例讲述了Python实现比较两个文件夹中代码变化的方法。分享给大家供大家参考。具体如下：

这里将修改代码后的目录与原始目录做对比，罗列出新增的代码文件，以及修改过的代码文件

# -*- coding: utf-8 -*-
import os;
folderA = \"F:\\\\Projects\\\\FreeImageV3_14_1\\\\\".lower();
folderB = u\"E:\\\\Software\\\\图像解码库\\\\FreeImage3141\\\\FreeImage\\\\\".lower();
filePathsA = {};
filePathsB = {};
for root,dirs,files in os.walk(folderA):
  for fileName in files:
    filePathsA[(root + \"\\\\\" + fileName).lower()] = 1;
for root,dirs,files in os.walk(folderB):
  for fileName in files:
    filePathsB[(root + \"\\\\\" + fileName).lower()] = 1;
# 在filePathsA中，找到所有和filePathsB中不一致的文件的路径    
modifiedFilePath = [];
addedFilePath = [];
for filePathA in filePathsA:
  folderALen = len(folderA);
  filePathB = folderB + filePathA[folderALen:]; 
  idx = filePathA.rfind(\".\");
  if idx == -1:
    continue;
  ext = filePathA[idx + 1:];
  ext = ext.lower();
  if ext != \"c\" and ext != \"h\" and ext != \"cpp\" and ext != \"cxx\":
    continue;
  if filePathB not in filePathsB:
    addedFilePath.append(filePathA);
    continue;
  text_file = open(filePathA, \"r\");
  textA = text_file.read();
  text_file.close();
  text_file = open(filePathB, \"r\");
  textB = text_file.read();
  text_file.close();
  if textA != textB:   
    modifiedFilePath.append(filePathA);
output = open(\'res.txt\', \'w\');
output.write(\"added files:\\n\");
for filePath in addedFilePath:
  output.write(filePath + \"\\n\");
output.write(\"modified files:\\n\");
for filePath in modifiedFilePath:
  output.write(filePath + \"\\n\");
output.close();

希望本文所述对大家的Python程序设计有所帮助。