old_contents: import os
  
  VERSION = None
  
  def version():
    """
    Retrives the current version of the SDK
    """
  
    global VERSION
    if VERSION is None:
      version_file = open(os.path.join('.', 'VERSION'))
      VERSION = version_file.read().strip()
  
    return VERSION
  
  def headers(api_key):
    """
    Helper function to easily get the correct headers for an endpoint
  
    :params api_key: The appropriate API key for the request being made
    """
  
    return {
        "Content-Type": "application/json",
        "Authorization": api_key,
        "X-Keensdkversion-X": "python-{0}".format(version())
    }
new_contents: import os
  
  VERSION = None
  
  def version():
    """
    Retrives the current version of the SDK
    """
  
    global VERSION
    if VERSION is None:
      version_file = open(os.path.join('.', 'VERSION'))
      VERSION = version_file.read().strip()
  
    return VERSION
  
  def headers(api_key):
    """
    Helper function to easily get the correct headers for an endpoint
  
    :params api_key: The appropriate API key for the request being made
    """
  
    return {
        "Content-Type": "application/json",
        "Authorization": api_key,
        "Keen-Sdk": "python-{0}".format(version())
    }
  
subject: change header name