利用Python查看目录中的文件示例详解

import os
def tree_dir(path, c_path='', is_root=True):
 """
 Get file list under path. Like 'tree'
 :param path Root dir
 :param c_path Child dir
 :param is_root Current is root dir
 """
 res = []
 if not os.path.exists(path):
 return res
 for f in os.listdir(path):
 if os.path.isfile(os.path.join(path, f)):
  if is_root:
  res.append(f)
  else:
  res.append(os.path.join(c_path, f))
 else:
  res.extend(tree_dir(os.path.join(path, f), f, is_root=False))
 return res

def tree_dir_sur(path, c_path='', is_root=True, suffix=''):
 """ Get file list under path. Like 'tree'
 :param path Root dir
 :param c_path Child dir
 :param is_root Current is root dir
 :param suffix Suffix of file
 """
 res = []
 if not os.path.exists(path) or not os.path.isdir(path):
 return res
 for f in os.listdir(path):
 if os.path.isfile(os.path.join(path, f)) and str(f).endswith(suffix):
  if is_root:
  res.append(f)
  else:
  res.append(os.path.join(c_path, f))
 else:
  res.extend(tree_dir_sur(os.path.join(path, f), f, is_root=False, suffix=suffix))
 return res
if __name__ == "__main__":
 for p in tree_dir_sur(os.path.join('E:\ws', 'rnote', 'Python_note'), suffix='md'):
 print p

# -*- coding: utf-8 -*-
import os
def count_by_categories(path):
 """ Find all target files and count the lines """
 if not os.path.exists(path):
 return
 c_l_dict = dict() # e.g. {category: lines}
 category_list = [cate for cate in os.listdir(path) if
   os.path.isdir(os.path.join(path, cate)) and not cate.startswith('.')]
 for category_dir in category_list:
 line_count = _sum_total_line(os.path.join(path, category_dir), '.md')
 if line_count > 0:
  c_l_dict[category_dir] = line_count
 return c_l_dict
def _sum_total_line(path, endswith='.md'):
 """ Get the total lines of target files """
 if not os.path.exists(path) or not os.path.isdir(path):
 return 0
 total_lines = 0
 for f in os.listdir(path):
 if f.endswith(endswith):
  with open(os.path.join(path, f)) as cur_f:
  total_lines += len(cur_f.readlines())
 return total_lines
if __name__ == '__main__':
 note_dir = 'E:/ws/rnote'
 ca_l_dict = count_by_categories(note_dir)
 all_lines = 0
 for k in ca_l_dict.keys():
 all_lines += ca_l_dict[k]
 print 'all lines:', str(all_lines)
 print ca_l_dict

all lines: 25433
{'flash_compile_git_note': 334, 'Linux_note': 387, 'Algorithm_note': 3637, 'Comprehensive': 216, 'advice': 137, 'Java_note': 3013, 'Android_note': 11552, 'DesignPattern': 2646, 'Python_note': 787, 'kotlin': 184, 'cpp_note': 279, 'PyQt_note': 439, 'reading': 686, 'backend': 1136}