def renumber_atoms(self):
if self.atoms:<EOL><INDENT>self._anumb_to_atom = {}<EOL>for i,atom in enumerate(self.atoms):<EOL><INDENT>atom.number = i+<NUM_LIT:1>   <EOL><DEDENT><DEDENT>else:<EOL><INDENT>self.logger("<STR_LIT>")<EOL><DEDENT>
Reset the molecule's atoms :attr:`number` to be 1-indexed