added filters for pb utils support

filters_additional.go

@@ -0,0 +1,22 @@
+package pongo2
+
+import (
+	"fmt"
+)
+
+// Range returns a list of integers from 1 till given input
+func Range(in *Value, param *Value) (out *Value, err *Error) {
+	if !in.IsInteger() {
+		return nil, &Error{
+			OrigError: fmt.Errorf("only strings should be sent to the scream filter"),
+		}
+	}
+
+	n := in.Integer()
+	l := []int{}
+	for i := 1; i < n+1; i++ {
+		l = append(l, i)
+	}
+
+	return AsValue(l), nil
+}

filters_builtin.go

@@ -95,6 +95,7 @@ func init() {
 
 	RegisterFilter("float", filterFloat)     // pongo-specific
 	RegisterFilter("integer", filterInteger) // pongo-specific
+	RegisterFilter("range", Range)           // additional
 }
 
 func filterTruncatecharsHelper(s string, newLen int) string {