Python programming implementation of two folders in the file comparison function example [containing content comparison]

This article is an example of Python programming to compare files in two folders. To share for your reference, specific as follows:

#-*-coding:utf-8-*-
#===============================================================================
#  Directory comparison tool ( Include subdirectories  ) And lists 
# 1 , A than B What files are there 
# 2 , B than A What files are there 
# 3 , 2 The same file : Same file size  VS  Different file sizes  (Size The same file is not printed : with Size Different files are not displayed sorted )
#===============================================================================
import os, time,difflib
AFILES = [] #EE
BFILES = [] #SVN
COMMON = [] #EE & SVN
def getPrettyTime(state):
  return time.strftime('%y-%m-%d %H:%M:%S', time.localtime(state.st_mtime))
# def getpathsize(dir): # Function to get the file size , Not to use , Just for learning . Therefore, comment out the 
#   size=0
#   for root, dirs, files in os.walk(dir):
#   #root: directory :str  Such as : C:\CopySVN\SystemObject\TopoProcedure\Built-in\
#   #dirs: Directory name : The list of :  Such as  ['Parsers']
#   #files: The name of the : The list of :  Such as  ['011D0961FB42416AA49D5E82945DE7E9.og',...]
#   #file: directory :str,  Such as  011D0961FB42416AA49D5E82945DE7E9.og
#     for file in files:
#       path = os.path.join(root,file)
#       size = os.path.getsize(path)
#   return size
def dirCompare(apath,bpath):
  afiles = []
  bfiles = []
  for root, dirs , files in os.walk(apath):
    for f in files:
      afiles.append(root + "\\" + f)
  for root, dirs , files in os.walk(bpath):
    for f in files:
      bfiles.append(root + "\\" + f)
      #sizeB = os.path.getsize(root + "\\" + f)  Defined here size Can't in commonfiles To compare the . (A,B In their respective cycles )
  #  To get rid of afiles Medium filename apath ( take A,B Same path \ The file name , Make a collection , To find the intersection )
  apathlen = len(apath)
  aafiles = []
  for f in afiles:
    aafiles.append(f[apathlen:])
  #  To get rid of bfiles Medium filename bpath
  bpathlen = len(bpath)
  bbfiles = []
  for f in bfiles:
    bbfiles.append(f[bpathlen:])
  afiles = aafiles
  bfiles = bbfiles
  setA = set(afiles)
  setB = set(bfiles)
  #print('%$%'+str(len(setA)))
  #print('%%'+str(len(setB)))
  commonfiles = setA & setB #  Handling of common files 
  #print ("===============File with different size in '", apath, "' and '", bpath, "'===============")
  # Output the results locally 
  #with open(os.getcwd()+'diff.txt','w') as di:
    #di.write("===============File with different size in '", apath, "' and '", bpath, "'===============")
  for f in sorted(commonfiles):
    sA=os.path.getsize(apath + "\\" + f)
    sB=os.path.getsize(bpath + "\\" + f)
    if sA==sB: # The size comparison of the common files 
      #pass #print (f + "\t\t" + getPrettyTime(os.stat(apath + "\\" + f)) + "\t\t" + getPrettyTime(os.stat(bpath + "\\" + f)))
      # The following code is the processing size 1 Yes, but the content may not 1 To the situation 
      #print("in sa=sb")
      #print(os.getcwd())
      saf=[]
      sbf=[]
      sAfile=open(apath + "\\" + f)
      iter_f=iter(sAfile)
      for line in iter_f:
        saf.append(line)
      sAfile.close()
      sBfile=open(bpath + "\\" + f)
      iter_fb=iter(sBfile)
      for line in iter_fb:
        sbf.append(line)
      sBfile.close()
      saf1=sorted(saf)
      sbf1=sorted(sbf)
      if(len(saf1)!=len(sbf1)):
        with open(os.getcwd()+'\\comment_diff.txt','a') as fp:
          print(os.getcwd())
          fp.write(apath + "\\" + f+" lines size not equal "+bpath + "\\" + f+'\n')
      else:
        for i in range(len(saf1)):
          #print("into pre")
          if(saf1[i]!=sbf1[i]):
            print('into commont')
            with open(os.getcwd()+'\\comment_diff.txt','a') as fp1:
              fp1.write(apath + "\\" + f+" content not equal "+bpath + "\\" + f+'\n')
              break
    else:
      with open (os.getcwd()+'\\diff.txt','a') as di:
        di.write("File Name=%s  EEresource file size:%d  != SVN file size:%d" %(f,sA,sB)+'\n')
      #print ("File Name=%s  EEresource file size:%d  != SVN file size:%d" %(f,sA,sB))
  #  Processing only occurs in 1 Files in a directory 
  onlyFiles = setA ^ setB
  aonlyFiles = []
  bonlyFiles = []
  for of in onlyFiles:
    if of in afiles:
      aonlyFiles.append(of)
    elif of in bfiles:
      bonlyFiles.append(of)
  #print ("###################### EE resource ONLY ###########################")
  #print ("#only files in ", apath)
  for of in sorted(aonlyFiles):
    with open (os.getcwd()+'\\EEonly.txt','a') as ee:
      ee.write(of+'\n')
    #print (of)
  #print ("*"*20+"SVN ONLY+"+"*"*20)
  #print ("#only files in ", bpath)
  for of in sorted(bonlyFiles):
    with open (os.getcwd()+'\\svnonly.txt','a') as svn:
      svn.write(of+'\n')
    #print (of)
if __name__ == '__main__':
  FolderEE = 'D:\\search\\bb\\ObjectGroup - Copy\\ObjectGroup\\Built-in'
  FolderSVN = 'D:\\search\\bb\\ObjectGroup\\ObjectGroup\\Built-in'
  dirCompare(FolderEE, FolderSVN)
  print("done!")

PS: Here's another online tool with similar functions:

Online text comparison tools:
http://tools.ofstack.com/aideddesign/txt_diff

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I hope this article is helpful for Python programming.