00
编写一个程序，统计当前目录下每个文件类型的文件数
import os
all_files = os.listdir(os.curdir)
type_dict =dict()
for each_file in all_files:
if os.path.isdir(each_file):
type_dict.setdefault(‘文件夹‘, 0)
type_dict[‘文件夹‘] += 1
else:
ext = os.path.splitext(each_file)[1]
type_dict.setdefault(ext, 0)
type_dict[ext] += 1
for each_type in type_dict.keys():
print(‘该文件夹下共有类型为【%s】的文件 %d 个‘ % (each_type,
type_dict[each_type]))
01
编写一个程序，计算当前文件夹下所有文件的大小。
import os
all_files = os.listdir(os.curdir)
file_dict = dict()
for each_file in all_files:
if os.path.isfile(each_file):
file_size = os.path.getsize(each_file)
file_dict[each_file] = file_size
for each in file_dict.items():
print(‘%s【%dBytes】‘ % (each[0], each[1]))
02
编写一个程序，用户输入文件名以及开始搜索的路径，搜索该文件是否存在。如遇到文件夹，则进入文件夹继续搜索
import os
def search_file(file_path,file_name):
os.chdir(file_path)
all_files = os.listdir(os.curdir)
for each_file in all_files:
if each_file == file_name:
print(os.getcwd() + os.sep + each_file)
if os.path.isdir(each_file):
search_file(each_file, file_name)
os.chdir(os.pardir)
file_path = input(‘请输入需要查找的路径：‘)
file_name = input(‘请输入需要查找的文件：‘)
search_file(file_path,file_name)
03
编写一个程序，用户输入开始搜索的路径，查找该路径下（包含子文件夹内）所有的视频格式文件（要求查找mp4 rmvb, avi的格式即可），并把创建一个文件（vedioList.txt）存放所有找到的文件的路径
import os
def search_file(file_path,file_name):
os.chdir(file_path)
all_files = os.listdir(os.curdir)
for each_file in all_files:
ext = os.path.splitext(each_file)[1]
if ext in file_name:
video_list.append(os.getcwd() + os.sep + each_file + os.linesep)
if os.path.isdir(each_file):
search_file(each_file, file_name)
os.chdir(os.pardir)
file_path = input(‘请输入需要查找的路径：‘)
program_dir = os.getcwd()
file_name = [‘.mp4‘, ‘.avi‘, ‘.rmvb‘]
video_list = []
search_file(file_path, file_name)
f = open(program_dir + os.sep + ‘videolist.txt‘, ‘w‘)
f.writelines(video_list)
f.close()
04
编写一个程序，用户输入关键字，查找当前文件夹内（如果当前文件夹内包含文件夹，则进入文件夹继续搜索）所有含有该关键字的文本文件（.txt后缀），要求显示该文件所在的位置以及关键字在文件中的具体位置（第几行第几个字符）
import os
def print_pos(key_dict):
keys = key_dict.keys()
keys = sorted(keys)
for each_key in keys:
print(‘关键字出现在第 %s 行，第 %s 个位置。‘ %
(each_key, str(key_dict[each_key])))
def pos_in_line(line, key):
pos = []
begin = line.find(key)
while begin != -1:
pos.append(begin + 1)
begin = line.find(key, begin + 1)
return pos
def search_in_file(file_name, key):
f = open(file_name)
count = 0
key_dict = dict()
for each_line in f:
count += 1
if key in each_line:
pos = pos_in_line(each_line, key)
key_dict[count] = pos
f.close()
return key_dict
def search_files(key, detail):
all_files = os.walk(os.getcwd())
txt_files = []
for i in all_files:
for each_file in i[2]:
if os.path.splitext(each_file)[1] == ‘.txt‘:
each_file = os.path.join(i[0], each_file)
txt_files.append(each_file)
for each_txt_file in txt_files:
key_dict = search_in_file(each_txt_file, key)
if key_dict:
print(‘================================================================‘)
print(‘在文件【%s】中找到关键字【%s】‘ % (each_txt_file, key))
if detail in [‘YES‘, ‘Yes‘, ‘yes‘]:
print_pos(key_dict)
key = input(‘请将该脚本放于待查找的文件夹内，请输入关键字：‘)
detail = input(‘请问是否需要打印关键字【%s】在文件中的具体位置（YES/NO）：‘ % key)
search_files(key, detail)
文件系统00