How to find the desired file among thousands of files on your computer?

This article mainly introduces the use of Python Write segment applet , To quickly find the files you want .

I don't say much nonsense , On the first code , And then explain .

import os
def findfiles(name, path):
    #  Define an array to hold the search results 
    search_result = []
    #  utilize os.walk Function to traverse all files in the path 
    for dir_path, dir_names, filenames in os.walk(path):
        for filename in filenames:
            if name in filename:
                search_result.append(os.path.join(dir_path, filename))
    # enumerate The function will take list Returns the subscript and value of the list in the form of 
    for index, value in enumerate(search_result):
        #  In the search results , By serial number 、 File name branch printout  
        print("[" + str(index+1) + ",", "'" + value + "'" + "]")


if __name__ == '__main__':
    search_path = input(" Please enter the path to search ：")
    file_name = input(" Please enter the name of the file you want to find ：")
    findfiles(file_name, search_path)

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This code is very simple , There are two main functions involved , One is os Modular walk function , One is the built-in function enumerate.

1. So let's see walk function ,os.walk Function is to traverse all the files , What does that mean ？ If you still have folders under the current search path , Will continue to go to this folder to find files , Go down one layer at a time , Until the end there is no folder .

walk The function returns three values ：

dir_path: Current search path

dir_names: All existing folders under the current path

filenames: All existing files in the current path

For example, the following example , In the folder "100days" below , There is one "day01" Folder , But there are no documents , So the third value is an empty list , And then I'll go into "day01" Folder continue to find files , Found that there is no folder , Only two files .

F:\Study\Python\100days ['day01'] []
F:\Study\Python\100days\day01 [] ['flag.py', 'peppa_pig.py']

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2. enumerate The function is python Built in functions , For traversing a data object ( As listing 、 Tuples or strings ) Combined into an index sequence , List both data and data index , Generally used in for Cycle of .

What does that mean ？ Is in the for For recycling enumerate Act on a traversable object , Not only will it return every value in the object , It also returns the subscript corresponding to the value , Sometimes we need to use the subscript corresponding to the value , So I'll use enumerate function , Write a small code to demonstrate

names = [" Zhang San ", " Li Si ", " Xiao Ming ", " name "]
for index, name in enumerate(names):
    print(index, name)

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 Output results ：
          0  Zhang San 
          1  Li Si 
          2  Xiao Ming 
          3  name 

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So we know that Zhang San is in the first position , Li Si is in the second position and so on .

Finally, let's take a look at the overall program execution results ：

For example, on the computer F:\Study\Python Find the name under the path that contains day The file of , give the result as follows ：

Expand ：

os There is also a function under the module to find files , Namely os.listdir, and os.walk The difference is that ,os.listdir Only all folders and files under the current path will be returned , Will not continue to drill down to the next folder to continue to find .