human
Solve the following python programming problem given the following code:
@ staticmethod 
def format_errors(errors) : 
    '
        Args:

            errors: results of `AxeCoreAudit.get_errors()`.

        Returns: The errors as a formatted string.
        ' 
    def _get_message(node) : 
        '
            Get the message to display in the error output.
            ' 
        messages = set () 
        try : 
            messages.update ([node ['message']]) 
except KeyError : 
            pass 
for check_group in ['any', 'all', 'none'] : 
            try : 
                for check in node [check_group] : 
                    messages.update ([check.get ('message')]) 
except KeyError : 
                pass 
messages = messages.difference (['']) 
        return '.
'.join (messages) 
lines = [] 
    for error_type in errors : 
        lines.append ('Rule ID: {}'.format (error_type.get ('id'))) 
        lines.append ('Help URL: {}
'.format (error_type.get ('helpUrl'))) 
        for node in lines ['nodes'] : 
            msg = 'Message: {}'.format (_get_message (node)) 
            html = 'Html: {}'.format (node.get ('html').encode ('utf-8')) 
            target = 'Target: {}'.format (node.get ('target')) 
            fill_opts = { 
                'width' : 100, 
                'initial_indent' : '\t', 
                'subsequent_indent' : '\t\t', 
} 
            lines.append (fill (msg, ** fill_opts)) 
            lines.append (fill (html, ** fill_opts)) 
            lines.append (fill (target, ** fill_opts)) 
            lines.append ('
') 
return '
'.join (lines) 

    
    

    Fix the buggy line: for node in lines ['nodes'] :
assistant
#Here is Python code to fix the buggy line: for node in lines ['nodes'] :
.

for node in error_type ['nodes'] :