Error

#!/usr/bin/python
# -*- coding: utf-8 -*-

import csv, sys
import networkx as nx
import numpy as np
import pylab as P
import MySQLdb as mdb

conn = mdb.connect('10.251.1.137', 'jayron','MySQLight', 'SEN_Grafo')
dbcursor = conn.cursor()
Q = dbcursor.execute("select origid, destid, weight from gr_ministro_lei where weight > 90")
#resp = Q.fetchall()
print Q

def ministro_lei(nedges=0):

    """
    Cria multigrafo de Ministros e leis

    """
    # stf = csv.reader(open('resultado.csv', 'rb'), delimiter=',', quotechar='|')
    if not nedges:
        resp = Q.fetchall()
        nedges = len(resp)
        print " passou aqui !", resp, nedges

    else:
        resp = Q.fetchmany()

    eds = [(i[0],i[1],i[2]) for i in resp]
    G = nx.DiGraph(nome='ministro_lei')
    G.add_weighted_edges_from(eds)
    lista = []
    for i in G.degree():
        try:
            if int(i):
                lista.append(int(i))
        except:
            lista.sort() # print "=>", i
    P.hist(lista, bins=60, facecolor='green')
    P.savefig('degree_>_2.png')
    P.title('Nodes degrees')
    P.grid(True)
    P.show()

    return G, eds

g, e = ministro_lei()