(self, name)
return self.get(name, missing) is not missing
Return true if the message contains the header.
Return true if the message contains the header.
Return true if the message contains the header .
def has_key(self, name):
        """Return true if the message contains the header."""
        missing = object()
        return self.get(name, missing) is not missing
def has_key ( self , name ) : missing = object ( ) return self . get ( name , missing ) is not missing