create and return the numexpr condition and filter
518014
def evaluate(self):
        

        try:
            self.condition = self.terms.prune(ConditionBinOp)
        except AttributeError:
            raise ValueError("cannot process expression [{expr}], [{slf}] "
                             "is not a valid condition".format(expr=self.expr,
                                                               slf=self))
        try:
            self.filter = self.terms.prune(FilterBinOp)
        except AttributeError:
            raise ValueError("cannot process expression [{expr}], [{slf}] "
                             "is not a valid filter".format(expr=self.expr,
                                                            slf=self))

        return self.condition, self.filter
500298
function nfx($expr) {

        $index = 0;
        $stack = new EvalMathStack;
        $output = array(); // postfix form of expression, to be passed to pfx()
        $expr = trim(strtolower($expr));
        // MDL-14274: new operators for comparison added.
        $ops   = array('+', '-', '*', '/', '^', '_', '>', '<', '<=', '>=', '==');
        $ops_r = array('+'=>0,'-'=>0,'*'=>0,'/'=>0,'^'=>1); // right-associative operator?
        $ops_p = array('+'=>0,'-'=>0,'*'=>1,'/'=>1,'_'=>1,'^'=>2, '>'=>3, '<'=>3, '<='=>3, '>='=>3, '=='=>3); // operator precedence

        $expecting_op = false; // we use this in syntax-checking the expression
                               // and determining when a - is a negation

        if (preg_match("/[^\w\s+*^\/()\.,-<>=]/", $expr, $matches)) { // make sure the characters are all good
            return $this->trigger(get_string('illegalcharactergeneral', 'mathslib', $matches[0]));
        }

        while(1) { // 1 Infinite Loop ;)
            // MDL-14274 Test two character operators.
            $op = substr($expr, $index, 2);
            if (!in_array($op, $ops)) {
                // MDL-14274 Get one character operator.
                $op = substr($expr, $index, 1); // get the first character at the current index
            }
            // find out if we're currently at the beginning of a number/variable/function/parenthesis/operand
            $ex = preg_match('/^('.self::$namepat.'\(?|\d+(?:\.\d*)?(?:(e[+-]?)\d*)?|\.\d+|\()/', substr($expr, $index), $match);
            //===============
            if ($op == '-' and !$expecting_op) { // is it a negation instead of a minus?
                $stack->push('_'); // put a negation on the stack
                $index++;
            } elseif ($op == '_') { // we have to explicitly deny this, because it's legal on the stack
                return $this->trigger(get_string('illegalcharacterunderscore', 'mathslib')); // but not in the input expression
            //===============
            } elseif ((in_array($op, $ops) or $ex) and $expecting_op) { // are we putting an operator on the stack?
                if ($ex) { // are we expecting an operator but have a number/variable/function/opening parethesis?
                    if (!$this->allowimplicitmultiplication){
                        return $this->trigger(get_string('implicitmultiplicationnotallowed', 'mathslib'));
                    } else {// it's an implicit multiplication
                        $op = '*';
                        $index--;
                    }
                }
                // heart of the algorithm:
                while($stack->count > 0 and ($o2 = $stack->last()) and in_array($o2, $ops) and ($ops_r[$op] ? $ops_p[$op] < $ops_p[$o2] : $ops_p[$op] <= $ops_p[$o2])) {
                    $output[] = $stack->pop(); // pop stuff off the stack into the output
                }
                // many thanks: http://en.wikipedia.org/wiki/Reverse_Polish_notation#The_algorithm_in_detail
                $stack->push($op); // finally put OUR operator onto the stack
                $index += strlen($op);
                $expecting_op = false;
            //===============
            } elseif ($op == ')' and $expecting_op) { // ready to close a parenthesis?
                while (($o2 = $stack->pop()) != '(') { // pop off the stack back to the last (
                    if (is_null($o2)) return $this->trigger(get_string('unexpectedclosingbracket', 'mathslib'));
                    else $output[] = $o2;
                }
                if (preg_match('/^('.self::$namepat.')\($/', $stack->last(2), $matches)) { // did we just close a function?
                    $fnn = $matches[1]; // get the function name
                    $arg_count = $stack->pop(); // see how many arguments there were (cleverly stored on the stack, thank you)
                    $fn = $stack->pop();
                    $output[] = array('fn'=>$fn, 'fnn'=>$fnn, 'argcount'=>$arg_count); // send function to output
                    if (in_array($fnn, $this->fb)) { // check the argument count
                        if($arg_count > 1) {
                            $a= new stdClass();
                            $a->expected = 1;
                            $a->given = $arg_count;
                            return $this->trigger(get_string('wrongnumberofarguments', 'mathslib', $a));
                        }
                    } elseif ($this->get_native_function_name($fnn)) {
                        $fnn = $this->get_native_function_name($fnn); // Resolve synonyms.

                        $counts = $this->fc[$fnn];
                        if (in_array(-1, $counts) and $arg_count > 0) {}
                        elseif (!in_array($arg_count, $counts)) {
                            $a= new stdClass();
                            $a->expected = implode('/',$this->fc[$fnn]);
                            $a->given = $arg_count;
                            return $this->trigger(get_string('wrongnumberofarguments', 'mathslib', $a));
                        }
                    } elseif (array_key_exists($fnn, $this->f)) {
                        if ($arg_count != count($this->f[$fnn]['args'])) {
                            $a= new stdClass();
                            $a->expected = count($this->f[$fnn]['args']);
                            $a->given = $arg_count;
                            return $this->trigger(get_string('wrongnumberofarguments', 'mathslib', $a));
                        }
                    } else { // did we somehow push a non-function on the stack? this should never happen
                        return $this->trigger(get_string('internalerror', 'mathslib'));
                    }
                }
                $index++;
            //===============
            } elseif ($op == ',' and $expecting_op) { // did we just finish a function argument?
                while (($o2 = $stack->pop()) != '(') {
                    if (is_null($o2)) return $this->trigger(get_string('unexpectedcomma', 'mathslib')); // oops, never had a (
                    else $output[] = $o2; // pop the argument expression stuff and push onto the output
                }
                // make sure there was a function
                if (!preg_match('/^('.self::$namepat.')\($/', $stack->last(2), $matches))
                    return $this->trigger(get_string('unexpectedcomma', 'mathslib'));
                $stack->push($stack->pop()+1); // increment the argument count
                $stack->push('('); // put the ( back on, we'll need to pop back to it again
                $index++;
                $expecting_op = false;
            //===============
            } elseif ($op == '(' and !$expecting_op) {
                $stack->push('('); // that was easy
                $index++;
                $allow_neg = true;
            //===============
            } elseif ($ex and !$expecting_op) { // do we now have a function/variable/number?
                $expecting_op = true;
                $val = $match[1];
                if (preg_match('/^('.self::$namepat.')\($/', $val, $matches)) { // may be func, or variable w/ implicit multiplication against parentheses...
                    if (in_array($matches[1], $this->fb) or
                                array_key_exists($matches[1], $this->f) or
                                $this->get_native_function_name($matches[1])){ // it's a func
                        $stack->push($val);
                        $stack->push(1);
                        $stack->push('(');
                        $expecting_op = false;
                    } else { // it's a var w/ implicit multiplication
                        $val = $matches[1];
                        $output[] = $val;
                    }
                } else { // it's a plain old var or num
                    $output[] = $val;
                }
                $index += strlen($val);
            //===============
            } elseif ($op == ')') {
                //it could be only custom function with no params or general error
                if ($stack->last() != '(' or $stack->last(2) != 1) return $this->trigger(get_string('unexpectedclosingbracket', 'mathslib'));
                if (preg_match('/^('.self::$namepat.')\($/', $stack->last(3), $matches)) { // did we just close a function?
                    $stack->pop();// (
                    $stack->pop();// 1
                    $fn = $stack->pop();
                    $fnn = $matches[1]; // get the function name
                    $fnn = $this->get_native_function_name($fnn); // Resolve synonyms.
                    $counts = $this->fc[$fnn];
                    if (!in_array(0, $counts)){
                        $a= new stdClass();
                        $a->expected = $this->fc[$fnn];
                        $a->given = 0;
                        return $this->trigger(get_string('wrongnumberofarguments', 'mathslib', $a));
                    }
                    $output[] = array('fn'=>$fn, 'fnn'=>$fnn, 'argcount'=>0); // send function to output
                    $index++;
                    $expecting_op = true;
                } else {
                    return $this->trigger(get_string('unexpectedclosingbracket', 'mathslib'));
                }
            //===============
            } elseif (in_array($op, $ops) and !$expecting_op) { // miscellaneous error checking
                return $this->trigger(get_string('unexpectedoperator', 'mathslib', $op));
            } else { // I don't even want to know what you did to get here
                return $this->trigger(get_string('anunexpectederroroccured', 'mathslib'));
            }
            if ($index == strlen($expr)) {
                if (in_array($op, $ops)) { // did we end with an operator? bad.
                    return $this->trigger(get_string('operatorlacksoperand', 'mathslib', $op));
                } else {
                    break;
                }
            }
            while (substr($expr, $index, 1) == ' ') { // step the index past whitespace (pretty much turns whitespace
                $index++;                             // into implicit multiplication if no operator is there)
            }

        }
        while (!is_null($op = $stack->pop())) { // pop everything off the stack and push onto output
            if ($op == '(') return $this->trigger(get_string('expectingaclosingbracket', 'mathslib')); // if there are (s on the stack, ()s were unbalanced
            $output[] = $op;
        }
        return $output;
    }
768422
def filter_int(n: Node, query: str) -> int:
    
    return _scalariter2item(n, query, int)
1103197
def _count(expr, pat, flags=0):
    
    return _string_op(expr, Count, output_type=types.int64,
                      _pat=pat, _flags=flags)
681996
def scan(cls, filter_builder=None, **scan_filter):
        
        scan_kwargs = {'scan_filter': build_condition(scan_filter)}
        if filter_builder:
            cls._build_filter_expression(filter_builder, scan_kwargs)
        return ResultSet(cls, 'scan', scan_kwargs)
615566
def undo_filter_sub(filter_unit, scanline, previous, result):
    """"""

    ai = 0
    # Loops starts at index fu.  Observe that the initial part
    # of the result is already filled in correctly with
    # scanline.
    for i in range(filter_unit, len(result)):
        x = scanline[i]
        a = result[ai]
        result[i] = (x + a) & 0xff
        ai += 1
623397
function (expr, cb, joinCond) {
            expr = (isUndefined(expr) || isNull(expr) || (Array.isArray(expr) && !expr.length)) ? null : expr;
            if (expr && cb) {
                return new BooleanExpression(joinCond || "AND", this._filterExpr(expr, null, joinCond), this._filterExpr(cb, null, joinCond));
            } else if (cb) {
                expr = cb;
            }
            if (isInstanceOf(expr, Expression)) {
                if (isInstanceOf(expr, NumericExpression, StringExpression)) {
                    throw new QueryError("Invalid SQL Expression type : " + expr);
                }
                return expr;
            } else if (Array.isArray(expr)) {
                if (expr.length) {
                    var first = expr[0];
                    if (isString(first)) {
                        return new PlaceHolderLiteralString(first, expr.slice(1), true);
                    } else if (Expression.isConditionSpecifier(expr)) {
                        return BooleanExpression.fromValuePairs(expr, joinCond);
                    } else {
                        return BooleanExpression.fromArgs([joinCond || "AND"].concat(expr.map(function (e) {
                            return this._filterExpr(e, null, "AND");
                        }, this)));
                    }
                }
            } else if (isFunction(expr)) {
                return this._filterExpr(expr.call(sql, sql), null, joinCond);
            } else if (isBoolean(expr)) {
                return new BooleanExpression("NOOP", expr);
            } else if (isString(expr)) {
                return this.stringToIdentifier(expr);
            } else if (isInstanceOf(expr, LiteralString)) {
                return new LiteralString("(" + expr + ")");
            } else if (isHash(expr)) {
                return BooleanExpression.fromValuePairs(expr, joinCond);
            } else {
                throw new QueryError("Invalid filter argument");
            }
        }
157599
private static boolean checkPureColumnIndex(Index index, int aggCol, List<AbstractExpression> filterExprs) {

        boolean found = false;

        // all left child of filterExprs must be of type TupleValueExpression in equality comparison
        for (AbstractExpression expr : filterExprs) {
            if (expr.getExpressionType() != ExpressionType.COMPARE_EQUAL) {
                return false;
            }
            if (!(expr.getLeft() instanceof TupleValueExpression)) {
                return false;
            }
            if (((TupleValueExpression)expr.getLeft()).getColumnIndex() == aggCol) {
                found = true;
            }
        }

        if (found) {
            return true;
        }
        if (index.getColumns().size() > filterExprs.size()) {
            List<ColumnRef> indexedColRefs = CatalogUtil.getSortedCatalogItems(index.getColumns(), "index");

            if (indexedColRefs.get(filterExprs.size()).getColumn().getIndex() == aggCol) {
                return true;
            }
        }

        return false;
    }
551007
def filter_int(string, default=None, start=None, stop=None):
    """"""
    try:
        i = int(string)
        if start is not None and i < start:
            raise InvalidInputError("value too small")
        if stop is not None and i >= stop:
            raise InvalidInputError("value too large")
        return i
    except ValueError:
        if not string and default is not None:
            # empty string, default was given
            return default
        else:
            raise InvalidInputError
308540
def p_filter_expr_predicate(p):
    
    if not hasattr(p[1], 'append_predicate'):
        p[1] = ast.PredicatedExpression(p[1])
    p[1].append_predicate(p[2])
    p[0] = p[1]
139801
def count(expr):
    

    if isinstance(expr, SequenceExpr):
        unique_input = _extract_unique_input(expr)
        if unique_input:
            return nunique(unique_input).rename('count')
        else:
            return Count(_value_type=types.int64, _input=expr)
    elif isinstance(expr, SequenceGroupBy):
        return GroupedCount(_data_type=types.int64, _input=expr.to_column(),
                            _grouped=expr.input)
    elif isinstance(expr, CollectionExpr):
        return Count(_value_type=types.int64, _input=expr).rename('count')
    elif isinstance(expr, GroupBy):
        return GroupedCount(_data_type=types.int64, _input=expr.input,
                            _grouped=expr).rename('count')
390423
def compile(self, expr, params=None, limit=None):
        
        query_ast = self._build_ast_ensure_limit(expr, limit, params=params)
        return query_ast.compile()
379759
def make_filter(**tests):
    """"""
    tests = [AttrTest(k, v) for k, v in tests.items()]
    return Filter(tests)
910743
def sub(self, inplace=False, **kwargs):
        """"""
        filter_ = self.where(**kwargs)
        return self.subindex(filter_, inplace)
481734
def interpolate_where(self, condition):
        
        raise NotImplementedError()
        self[self < 0] = np.nan
        return self.interpolate()
1265907
def expr2dimacscnf(ex):
    """"""
    litmap, nvars, clauses = ex.encode_cnf()
    return litmap, DimacsCNF(nvars, clauses)
303165
def __undo_filter_sub(self, scanline):
        """"""
        ai = 0
        # Loops starts at index fu.
        for i in range(self.fu, len(scanline)):
            x = scanline[i]
            a = scanline[ai]  # result
            scanline[i] = (x + a) & 0xff  # result
            ai += 1