parameters: (body, as_hex=False)
docstring: Calculate a sha256 checksum.
  
      This method will calculate the sha256 checksum of a file like
      object.  Note that this method will iterate through the entire
      file contents.  The caller is responsible for ensuring the proper
      starting position of the file and ``seek()``'ing the file back
      to its starting location if other consumers need to read from
      the file like object.
  
      :param body: Any file like object.  The file must be opened
          in binary mode such that a ``.read()`` call returns bytes.
      :param as_hex: If True, then the hex digest is returned.
          If False, then the digest (as binary bytes) is returned.
  
      :returns: The sha256 checksum
docstring_summary: Calculate a sha256 checksum.
docstring_tokens: Calculate a sha256 checksum .
function: def calculate_sha256(body, as_hex=False):
      """Calculate a sha256 checksum.
  
      This method will calculate the sha256 checksum of a file like
      object.  Note that this method will iterate through the entire
      file contents.  The caller is responsible for ensuring the proper
      starting position of the file and ``seek()``'ing the file back
      to its starting location if other consumers need to read from
      the file like object.
  
      :param body: Any file like object.  The file must be opened
          in binary mode such that a ``.read()`` call returns bytes.
      :param as_hex: If True, then the hex digest is returned.
          If False, then the digest (as binary bytes) is returned.
  
      :returns: The sha256 checksum
  
      """
      checksum = hashlib.sha256()
      for chunk in iter(lambda: body.read(1024 * 1024), b''):
          checksum.update(chunk)
      if as_hex:
          return checksum.hexdigest()
      else:
          return checksum.digest()
function_tokens: def calculate_sha256 ( body , as_hex = False ) : checksum = hashlib . sha256 ( ) for chunk in iter ( lambda : body . read ( 1024 * 1024 ) , b'' ) : checksum . update ( chunk ) if as_hex : return checksum . hexdigest ( ) else : return checksum . digest ( )