[PyQt] Using QVariant.toPyObject to wrap the to* functions

Henning Schröder henning.schroeder at gmail.com
Thu Aug 14 20:19:28 BST 2008

On Thu, Aug 14, 2008 at 9:44 AM, Arve Knudsen <arve.knudsen at gmail.com> wrote:
> On Wed, Aug 13, 2008 at 9:37 PM, Erick Tryzelaar
> <idadesub at users.sourceforge.net> wrote:
>> [..]
>> and etc. This makes QVariant a little more pythonic to me, in my opinion.
> I agree about this. It would be more natural to have toPyObject work
> for the standard types in addition to custom ones, and simplify the
> logic greatly.
Yes this would be a great improvement.
I currently use the function below but having this available via
toPyObject() would be a great improvement.

variant_converter = {
  "QVariantList": lambda v: from_variantlist(v),
  "QList<QVariant>": lambda v: from_variantlist(v),
  "int": lambda v: v.toInt()[0],
  "double": lambda v: v.toDouble()[0],
  "char": lambda v: v.toChar(),
  "QByteArray": lambda v: v.toByteArray(),
  "QString": lambda v: unicode(v.toString()),
  "QPoint": lambda v: v.toPoint(),
  "QPointF": lambda v: v.toPointF(),
  "QSize": lambda v: v.toSize(),
  "QLine": lambda v: v.toLine(),
  "QStringList": lambda v: v.toStringList(),
  "QTime": lambda v: v.toTime(),
  "QDateTime": lambda v: v.toDateTime(),
  "QDate": lambda v: v.toDate(),
  "QLocale": lambda v: v.toLocale(),
  "QUrl": lambda v: v.toUrl(),
  "QRect": lambda v: v.toRect(),
  "QBrush": lambda v: QBrush(v),
  "QFont": lambda v: QFont(v),
  "QPalette": lambda v: QPalette(v),
  "QPixmap": lambda v: QPixmap(v),
  "QImage": lambda v: QImage(v),
  "bool": lambda v: v.toBool(),
  "QObject*": lambda v: ScripterNG.fromVariant(v),
  "QWidget*": lambda v: ScripterNG.fromVariant(v),

def from_variantlist(variantlist):
    convert QList<QVariant> to a normal Python list
    return [from_variant(variant) for variant in variantlist.toList()]

def from_variant(variant):
    convert a QVariant to a Python value
    typeName = variant.typeName()
    convert = variant_converter.get(typeName)
    if not convert:
        raise ValueError, "Could not convert value to %s" % typeName
        return convert(variant)

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