How to Search a Folder and All of Its Subfolders For Files of a Certain Type

How to search a folder and all of its subfolders for files of a certain type

You want the Find module. Find.find takes a string containing a path, and will pass the parent path along with the path of each file and sub-directory to an accompanying block. Some example code:

require 'find'

pdf_file_paths = []
Find.find('path/to/search') do |path|
  pdf_file_paths << path if path =~ /.*\.pdf$/
end

That will recursively search a path, and store all file names ending in .pdf in an array.

Python: Searching a directory and subdirectories for a certain file type

You can do it using listdir and endswith to identify characters at the end of a string:

filetypes = ['cpp', 'hpp', 'ipp']
dir = "target directory"

files = [[f for f in os.listdir(dir) if f.endswith(type_)] for type_ in filetypes]

This will result in list of lists where each list will hold files of specific type.

Using grep to search for specific type of files in all subdirectories

You can use the following option of grep:

 --include=GLOB
 Search only files whose base name matches GLOB (using wildcard matching as described under --exclude).

And for the line number you should use the -n option.
From within the root of the folders you want to look into, you can use this final command:

grep -nr "Mutual_Values_23.0" --include="gnuout_mutual_*txt"

How can I recursively find all files in current and subfolders based on wildcard matching?

Use find:

find . -name "foo*"

find needs a starting point, so the . (dot) points to the current directory.

Searching for All Files Containing a Specific Extention in a Folder and Subfolders

FileSearch was removed from VBA in Office 2007. Thankfully it's not difficult to create your own routine for searching files using the FileSystemObject (add the Windows Scripting Runtime as a reference to get Intellisense code hints).

This is the one that I use - your list of files will be returned as a Collection by the FileList function. It should be simple to add a filter to this to only populate the collection with files of a particular extension.

[Note that you'll need to add the Windows Scripting Runtime reference as mentioned above since the objects are early bound in my example]

Function FileList(Path As String) As Collection

    Dim FSO as New Scripting.FileSystemObject
    Dim StartingFolder As Scripting.Folder
    Set StartingFolder = FSO.GetFolder(Path)

    Set FileList = New Collection
    RecursiveGetFiles StartingFolder, FileList

End Function


Private Sub RecursiveGetFiles(StartingFolder As Scripting.Folder, ByRef FullFileList As Collection)

    Dim File As Scripting.File
    For Each File In StartingFolder.Files
        FullFileList.Add File, File.Path
    Next File

    Dim SubFolder As Scripting.Folder
    For Each SubFolder In StartingFolder.SubFolders
        RecursiveGetFiles SubFolder, FullFileList
    Next SubFolder

End Function

This code can then be called by some parent routine, i.e.

Sub Search(Path As String)

     Dim ListOfFiles As Collection
     Set ListOfFiles = FileList(Path)

     Dim File As Scripting.File
     For Each File In ListOfFiles
         Debug.Print File.Name
     Next File

End Sub

Recursively Find Files With Particular File Extension and Content

What do you mean by keyword? Is that a word, present inside the file? Or is it a part of the filename?

In case it's the part of the filename, you can use file: in the Windows search, like in following example:

file:*keyword*.py

This will show you all files, called *keyword*.py. After you've done that, you might change your Windows explorer's view, clicking on the "View" tab and choose "Details", this will also show you the directory where those files are located.

Find all files in a directory with extension .txt in Python

You can use glob:

import glob, os
os.chdir("/mydir")
for file in glob.glob("*.txt"):
    print(file)

or simply os.listdir:

import os
for file in os.listdir("/mydir"):
    if file.endswith(".txt"):
        print(os.path.join("/mydir", file))

or if you want to traverse directory, use os.walk:

import os
for root, dirs, files in os.walk("/mydir"):
    for file in files:
        if file.endswith(".txt"):
             print(os.path.join(root, file))

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