QGIS » QGIS Application

I am trying to calculate the total length of of the roads in Romania.

I have saved the shp file as the projection 31700 ( Stereo1970 - Dealul Piscului )

I have exited and entered again. When i set the layer to editable and i go to the new bar field calculator in Qgis 2.3, i get the length as a part of one degree, per example 0.0004953245

The reason i choose the 31700 projection is because the ratio is exactly one meter. So if i have a 12 meters road, i will get 12 meters.

I also tried with sum line length but for the 440.000 ways that romania osm extract have, and i get a Not Responding on a 8 GB, Quad Core configuration.

I also tried with Group Stats Plugin but this also return the values in degrees

I also tried this python example from http://woostuff.wordpress.com/2011/02/23/total-length-of-selected-objects-qgis-via-python/

with shapely installed, but is seems not to work

from shapely.wkb import loads
def getLength():
    layer = qgis.utils.iface.mapCanvas().currentLayer()
    total = 0
    for feature in layer.selectedFeatures():
        geom = feature.geometry()
        wkb = geom.asWkb()
        line = loads(wkb)
        total = total + line.length
    return total

print getLength()

i get

File "<input>", line 11
    print
        ^
SyntaxError: invalid syntax