input: Write a python function to fetch binary data from a URL using the requests library.
  assert isinstance(getFileData("https://example.com/sample.txt"), bytes)
  assert isinstance(getFileData("https://example.com/image.jpg"), bytes)
  assert isinstance(getFileData("https://example.com/document.pdf"), bytes)
output: def getFileData(url):
      import requests
      response = requests.get(url)
      return response.content