NavigationToolbar2QT

from PyQt4.QtCore import *
from PyQt4.QtGui import *
import PyQt4.QtGui as QtGui

import matplotlib
if matplotlib.get_backend() != "Qt4Agg":
    matplotlib.use("Qt4Agg")

from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4 import NavigationToolbar2QT as NavigationToolbar

from matplotlib.figure import Figure

class MPL_Widget(QWidget):
    def __init__(self, parent = None):
        QWidget.__init__(self, parent)
        self.fig = Figure(figsize = (10, 12), dpi=100, facecolor = '#FFFFFF')
        self.ax = self.fig.add_subplot(111, sharex = None, sharey = None)
        self.canvas = FigureCanvas(self.fig)
        self.toolbar = NavigationToolbar(self.canvas, self.canvas)
        self.toolbar.resize(10,10)
        self.vbox = QVBoxLayout()
        tmp = self.vbox
        tmp = QSplitter()
        tmp.setOrientation(Qt.Vertical)
        tmp.setContentsMargins(0,0,0,0)
        tmp.addWidget(self.canvas)
        tmp.addWidget(self.toolbar)
        self.vbox.addWidget(tmp)
        self.setLayout(self.vbox)
        self.layout().setContentsMargins(0,0,0,0)

import sys
app = QApplication(sys.argv)
w = MPL_Widget()
import numpy as N
x = N.linspace(-10, 10)
y = N.sin(x)
ax = w.ax
ax.plot(x, y, 'o-', mew=0)
w.show()
sys.exit(app.exec_())