2019独角兽企业重金招聘Python工程师标准>>> 
python中除了matplotlib外，PyQwt也可以用于画图。前者是基于wxpython，后者是基于PyQt，有异曲同工之妙。
下面是一个小例子：
# -*- coding: utf-8 -*-
import sys
import numpy as np
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.Qwt5 import *
class Ex01(QWidget):
'''
创建QwtPlot对象，
通过调用QwtPlot对象的方法setTitle(String)来设定图的标题文字
setAxisTitle(AxisId, String)用来设定坐标轴的标题
fig.xBottom和fig.yLeft为QwtPlot对象的属性，分别代表fig的下方x轴和左边的y轴
'''
def __init__(self):
QWidget.__init__(self)
fig = QwtPlot()
fig.setParent(self)
text = "f(x) = x + x<sup>2<\sup>"
fig.setTitle(text)
fig.setAxisTitle(fig.xBottom, "x")
fig.setAxisTitle(fig.yLeft, "f(x)")
x = np.arange(0, 10, 0.1)
y = x +x**2
curve = QwtPlotCurve()
curve.setData(x, y)
curve.attach(fig)
fig.replot()
fig.resize(400, 300)
def main():
app = QApplication(sys.argv)
frame = Ex01()
frame.show()
app.exec_()
if __name__ == "__main__":
main()