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

check_dir.py

import os
print(os.path.isdir("/home/el"))
print(os.path.exists("/home/el/myfile.txt"))

gistfile1.txt

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))