@property<EOL><INDENT>def source_file_def_line(self):<DEDENT>
try:<EOL><INDENT>return inspect.getsourcelines(self.code_obj)[-<NUM_LIT:1>]<EOL><DEDENT>except (OSError, TypeError):<EOL><INDENT>pass<EOL><DEDENT>
Number of line where the object is defined in its file.