Python实现比较两个文件夹中代码变化的方法

# -*- 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:
");
for filePath in addedFilePath:
 output.write(filePath + "
");
output.write("modified files:
");
for filePath in modifiedFilePath:
 output.write(filePath + "
");
output.close();