help(filecmp.dircmp) 摘選：            
 
 | High level usage:              
 | x = dircmp(dir1, dir2)             
 | x.report() -> prints a report on the differences between dir1 and dir2 
 |  or                 
 | x.report_partial_closure() -> prints report on differences between dir1
 |   and dir2, and reports on common immediate subdirectories.  
 | x.report_full_closure() -> like report_partial_closure,    
 |   but fully recursive. 

# -*- coding: utf-8 -*-
"""
@desc 使用filecmp.dircmp遞歸比對(duì)兩個(gè)目錄，輸出比對(duì)結(jié)果以及統(tǒng)計(jì)信息。
@author longfeiwlf
@date 2020-5-20
"""
 
from filecmp import dircmp
import sys
 
# 定義全局變量：
number_different_files = 0 # 文件名相同但不一致的文件數(shù)
number_left_only = 0 # 左邊目錄獨(dú)有的文件或目錄數(shù)
number_right_only = 0 # 右邊目錄獨(dú)有的文件或目錄數(shù)
 
 
def print_diff(dcmp):
 """遞歸比對(duì)兩目錄，如果有不同之處，打印出來，同時(shí)累加統(tǒng)計(jì)計(jì)數(shù)。"""
 global number_different_files
 global number_left_only
 global number_right_only
 for name in dcmp.diff_files:
  print("diff_file found: %s/%s" % (dcmp.left, name))
  number_different_files += 1
 for name_left in dcmp.left_only:
  print("left_only found: %s/%s" % (dcmp.left, name_left))
  number_left_only += 1
 for name_right in dcmp.right_only:
  print("right_only found: %s/%s" % (dcmp.right, name_right))
  number_right_only += 1
 for sub_dcmp in dcmp.subdirs.values():
  print_diff(sub_dcmp) # 遞歸比較子目錄
 
 
if __name__ == '__main__':
 try:
  mydcmp = dircmp(sys.argv[1], sys.argv[2])
 except IndexError as ie:
  print(ie)
  print("使用方法：python compare_dir_cn.py 目錄1 目錄2")
 else:
  print("\n比對(duì)結(jié)果詳情: ")
  print_diff(mydcmp)
  if (number_different_files == 0 and number_left_only == 0
    and number_right_only == 0):
   print("\n兩個(gè)目錄完全一致!")
  else:
   print("\n比對(duì)結(jié)果統(tǒng)計(jì):")
   print("Total Number of different files is: " 
     + str(number_different_files))
   print("Total Number of files or directories only in '"
     + sys.argv[1] + "' is: " + str(number_left_only))
   print("Total Number of files or directories only in '"
     + sys.argv[2] + "' is: " + str(number_right_only))