import pygtk
pygtk.require('2.0')
import gtk

w = gtk.Window(gtk.WINDOW_TOPLEVEL)
l = gtk.Label("test")
l.set_tooltip_text("http://chart.apis.google.com/chart?cht=lc&chs=600x300&chd=t:_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,1041.588,1037.871,1033.204,1027.7642,1021.743,1015.334,1008.718,1001.984,995.1258,988.0986,980.8724,973.4578,965.9242,958.3426,950.7628,943.2396,935.835,928.6166,921.799,915.4444,909.387,903.7216,898.5768,893.9796,890.0032,886.6752,884.0104,882.0124,880.6462,879.8528,879.5686,879.678,880.0684,880.6674,881.3968,882.1434,882.836,883.414,883.834,884.07,884.112,883.9654,883.6464,883.1786,882.5888,881.9026,881.1418,880.322,879.49,878.6056,877.654,876.6306,875.5254,874.3254,873.0168,871.5838,870.01,868.3216,866.4898,864.426,862.1374&chxt=x,y,x&chxl=0:|mar%2027.apr|mer%2028.apr|mer%2028.apr|gio%2029.apr|gio%2029.apr|ven%2030.apr|ven%2030.apr|sab%2001.mag|sab%2001.mag|2:|13:00|01:00|13:00|01:00|13:00|01:00|13:00|01:00|13:00&chg=0,5&chxr=1,850,1050,50&chco=0000FF&&chtt=ARPA+SIMC:+Previsione+di+portata+del+Marecchia&chds=850,1050")
w.set_size_request(300, 500)
w.add(l)
w.show_all()
w.show()
gtk.main()