List the files in a specified directory
    Args:
        full_directory_path: The full directory path to check, derive from the os module

    Returns: returns a list of files

def list_files_in_directory(full_directory_path):
    """
    List the files in a specified directory
    Args:
        full_directory_path: The full directory path to check, derive from the os module

    Returns: returns a list of files

    """
    files = list()
    for file_name in __os.listdir(full_directory_path):
        if __os.path.isfile(__os.path.join(full_directory_path, file_name)):
            files.append(file_name)
    return files