from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg
from matplotlib.figure import Figure
# Импорты которые надо добавить в начало


def draw_some(plot):
        fig = Figure(figsize=(5, 5))
        #can = FigureCanvasQTAgg(fig)
        #.toolbar = NavigationToolbar2QT(can, self)
        #layout = qtw.QVBoxLayout(self)
        #layout.addWidget(toolbar)
        #layout.addWidget(can)fig = Figure(figsize=(5, 5))
        fig = Figure(figsize=(5, 5))
        can = FigureCanvasQTAgg(fig)
        layout = qtw.QVBoxLayout(plot)
        layout.addWidget(can)

        # here you can set up your figure/axis
        ax = can.figure.add_subplot(111)

        # plot a basic line plot from x and y values.
        ax.cla() # clears the axis

        # тут твоё гавно
        X, Y = (10, 20), (10, 20)

        ax.plot(X, Y )
        ax.grid(True)
        can.figure.tight_layout()
        can.draw()






app = qtw.QApplication([])
qt_app = qtw.QWidget()
layout = qtw.QVBoxLayout(qt_app)
plot = qtw.QWidget()
layout.addWidget( plot )
qt_app.setLayout( layout )
draw_some( plot )


qt_app.show()
app.exec_()