python 030 os模块

风不会停息

1. 调用os模块： import os， os模块中的函数使用方法：http://bbs.fishc.com/thread-45512-1-1.html

2.  030 动动手的程序实现：

import  os

def  seek_extension(path):
    file_type = {}
    file = os.listdir(path)
    for  each_file in file:
        file_name_extension = os.path.splitext(each_file)
        if  file_name_extension[1] not in file_type:
            file_type[file_name_extension[1]] = 1
        else:
            file_type[file_name_extension[1]] += 1

    if  '' in file_type:
        file_type.setdefault('文件夹', file_type[''])
        file_type.pop('')

    for  eachkey in file_type.keys():
        print("该文件夹下共有类型为【%s】的文件 %d 个" % ( eachkey, file_type[eachkey] ) )


path = input("输入要查找的绝对路径： ")
seek_extension(path)

import os

def  file_size_calc(path):
    file = os.listdir(path)
    file_size = {}
    for  each_file in file:
        file_size[each_file] = os.path.getsize(path + '\\' + each_file)         #os.path.getsize(path) 中 path为绝对路径

    for  each_key in file_size.keys():
        print('%s 【%d bytes】' % ( each_key, file_size[each_key] ) )


path = input("请输入要查找位置的绝对路径： ")
file_size_calc(path)

import os

def  find_file(path, file):
    os.chdir(path)
    
    for  each_file in os.listdir( os.curdir ):
        if  os.path.isdir(each_file):
            find_file(each_file, file)
            os.chdir('..')
        if  each_file == file:
            print(os.getcwd() + os.sep + each_file)

path = input("请输入待查找的初始目录： ")
file = input("请输入需要查找的目标文件： ")
find_file(path, file)

import os
file_format = ['.mp4', '.rmvb', '.avi']
save_filepath = list()

def  search_file(path):
    os.chdir(path)

    for  each_file in os.listdir(os.curdir):
        if  os.path.isdir(each_file):
            search_file(each_file)
            os.chdir(os.pardir)
        if  os.path.splitext(each_file)[1] in file_format:
            save_filepath.append(os.getcwd() + os.sep + each_file)

    f = open('D:\\python\\python_study\\vediolist.txt', 'w')
    for  each in save_filepath:
        f.writelines(each + '\n')

    f.close()

path = input("请输入带查找的初始目录： ")
search_file(path)

import os

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  pos_in_file(file, key):
    dict_key = dict()
    count = 0
    target_file = open(file)

    for  each_line in target_file:
        count += 1
        if  key in each_line:
            pos = pos_in_line(each_line, key)
            dict_key[count] = pos

    target_file.close()
    return dict_key

def  print_key(dict_key):
    keys = dict_key.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, dict_key[each_key] ) )
        

def  search_key(path, key):
    os.chdir(path)

    for  each_file in os.listdir(os.curdir):
        if  os.path.isdir(each_file):
            search_key(each_file, key)
            os.chdir(os.pardir)
        if  os.path.isfile(each_file):
            if  os.path.splitext(each_file)[1] == '.txt':
                dict_key = pos_in_file(each_file, key)
                if  dict_key != {}:
                    print('==================================================================================')
                    print("在文件【%s】中找到关键字【%s】" %( (os.getcwd() + os.sep + each_file), key ) )
                    print_key(dict_key)


path = input("请输入要查找的路径： ")
key = input("请输入要查找的关键字： ")
search_key(path, key)