def insertWebsite(self, url, domain):
		'''增加一个网页,标记为未访问,并对相应的domain增加其入度'''
		cur = self.conn.cursor()
		cur.execute("SELECT 1 FROM Domains WHERE domain=?", (domain,))
		result = cur.fetchone()
		if not result:
			# 未有对应domain记录, 先创建domain, 把入度设为1
			if VERBOSE:
				print 'Spot Domain:',domain
			self.insertDomain(domain, indegree=1)
			cur.execute("SELECT did FROM Domains WHERE domain=?", (domain,))
			did = cur.fetchone()[0]
		else:
			did = result[0]
			# 对应的domain记录已经存在, 对其入度+1
			cur.execute("UPDATE Domains SET outdegree=outdegree+1 WHERE domain=?", (domain,))

		cur.execute("INSERT INTO Websites VALUES (NULL,?,?,NULL,0)", (did, url,))
		# 写入到文件
		self.conn.commit()
def torque(pos, torque, ax=0):
    """creates plot from torque vs position"""
    k = 20
    alpha = np.linspace(pos[0], pos[-1],
                        k*len(torque))
    f = ip.interp1d(pos, torque, kind='quadratic')
    unit = 'Nm'
    scale = 1
    if np.min(torque) < -9.9e3 or np.max(torque) > 9.9e3:
        scale = 1e-3
        unit = 'kNm'
    if ax == 0:
        ax = plt.gca()
    ax.set_title('Torque / {}'.format(unit))
    ax.grid(True)
    ax.plot(pos, [scale*t for t in torque], 'go')
    ax.plot(alpha, scale*f(alpha))
    if np.min(torque) > 0 and np.max(torque) > 0:
        ax.set_ylim(bottom=0)
    elif np.min(torque) < 0 and np.max(torque) < 0:
        ax.set_ylim(top=0)