human
Solve the following python programming problem given the following code:
def ast_to_code(ast, indent = 0) : 
    '
    Converts an ast into a python code representation of the AST.
    ' 
    code = [] 
    def append(line) : 
        code.append ((('    ' * indent) + line)) 
if isinstance (ast, Node) : 
        append ('ast.{}('.format (ast.__class__.__name__)) 
        indent += 1 
        for (i, k) in enumerate (ast._fields, 1) : 
            v = getattr (ast, k) 
            append ('{}={},'.format (k, ast_to_code (v, indent))) 
if ast.loc : 
            append ('loc={}'.format (ast_to_code (ast.loc, k))) 
indent -= 1 
        append (')') 
else : 
        if isinstance (ast, Loc) : 
            append ('loc({}, {})'.format (ast.start, ast.end)) 
else : 
            if isinstance (ast, list) : 
                if ast : 
                    append ('[') 
                    indent += 1 
                    for (i, it) in enumerate (ast, 1) : 
                        is_last = (i == len (ast)) 
                        append ((ast_to_code (it, indent) + (',' if (not is_last) else ''))) 
indent -= 1 
                    append (']') 
else : 
                    append ('[]') 
else : 
                append (repr (ast)) 
return '
'.join (code).strip () 

    
    

    Fix the buggy line: append ('loc={}'.format (ast_to_code (ast.loc, k)))
assistant
#Here is Python code to fix the buggy line: append ('loc={}'.

append ('loc={}'.format (ast_to_code (ast.loc, indent)))