------------恢复内容开始------------

0：

import os

all_files = os.listdir(os.curdir)
type_dict = {}
type_dict['文件夹'] = 0
for each in all_files:
    if os.path.isdir(each):
        type_dict['文件夹'] += 1
    else:
        suffix = os.path.splitext(each)[1]
        type_dict.setdefault(suffix, 0)
        type_dict[suffix] += 1

print(type_dict)
for each_doc in type_dict:
    print('该文件夹下共有类型为'+each_doc+'的文件%d个'%type_dict[each_doc])

1：

all_files = os.listdir(os.curdir)
# type_dict = {}
# type_dict['文件夹'] = 0
for each in all_files:
    print(each,'[%d]Bytes'%os.path.getsize(each))

2：

 在一个目录中查文件  哈哈哈 这个是我自己写的  开心 好难。

def search_file(file_name,path):
    all_files = os.listdir(path)
    a = None
    for each in all_files:
        if each == file_name and a== None:
            return path
        else:
            if os.path.isdir(os.path.join(path,each)) and a== None:
                a = search_file(file_name,os.path.join(path,each))
    if a != None :
        return a


path = input('请输入待查找的初始目录：')
file_name = input('请输入需要查找的目标文件：')
print(search_file(file_name,path))

3：

def search_file(path,target):
    all_files = os.listdir(path)
    for each in all_files:
        if os.path.isdir(os.path.join(path,each)) :
            a = search_file(os.path.join(path,each),target)
        else:
            if os.path.splitext(each)[1] in '.mp4,.rmvb,.avi,.mp3':
                target.write(os.path.join(path,each))
                target.write('\n')


f = open('vedioList.txt','w')
path = input('请输入待查找的初始目录：')
print(search_file(path,f))

啊啊啊  信心再次增强！！！

4：  对不起 信心没了  抄答案

 

def print_pos(key_dict):
    keys = key_dict.keys()
    keys = sorted(keys) # 由于字典是无序的，我们这里对行数进行排序
    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) # 用户的角度是从1开始数
        begin = line.find(key, begin+1) # 从下一个位置继续查找

    return pos


def search_in_file(file_name, key):
    f = open(file_name)
    count = 0 # 记录行数
    key_dict = dict() # 字典，用户存放key所在具体行数对应具体位置

    for each_line in f:
        count += 1
        if key in each_line:
            pos = pos_in_line(each_line, key) # key在每行对应的位置
            key_dict[count] = pos

    f.close()
    return key_dict


def search_files(key, detail):
    all_files = os.walk(os.getcwd())
    #walk 行走至目录 而且会将文件分类 返回一个迭代对象  0是当前目录 1是文件夹列表 2是文件列表      os.getcwd 返回当前进程目录。
    txt_files = []

    for i in all_files:
        for each_file in i[2]:
            if os.path.splitext(each_file)[1] == '.txt': # 根据后缀判断是否文本文件
                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)