import os


def myfun(path, format):
    os.chdir(path)
    i = 1
    files = os.listdir(path)

    for file in files:
        if os.path.splitext(file)[1] == format:
            os.rename(file, f"{i} {format}")
            i += 1


filepath = input("Enter File path \n")
fileformat = input("Enter file format \n")

myfun(filepath, fileformat)