import os

def del_files(path):
    for root , dirs, files in os.walk(path):
        for name in files:
            if name.endswith(".tmp"):
                os.remove(os.path.join(root, name))
  print ("Delete File: " + os.path.join(root, name))

# test
if __name__ == "__main__":
    path = '/tmp'
    del_files(path)