Python 3:get specific type files

get_specific_type_files.py

#scan a directory iteratively and get specific type files
#tested under Python3
import os
import os.path

def print_filename(item, sou_dir, type):
    (filepath, filename) = os.path.split(item)
    if type == os.path.splitext(filename)[1]:
        sourcefile = os.path.join(sou_dir, item)
        print(sourcefile)
    else:
        return

def find(sou_dir, type):
    for item in os.listdir(sou_dir):
        subdir = os.path.join(sou_dir, item)
        if os.path.isfile(subdir):
            print_filename(item, sou_dir, type)
        else:
            find(subdir, type)

if __name__ == '__main__':
    source = input('source directory:')
    type = input('filetype:')
    find(source, type)
    print('Done')