[英]How do you display a figure in matplotlib using PySide2?
我正在嘗試學習matplotlib,並嘗試測試以下代碼。
import matplotlib
from matplotlib.figure import Figure
import matplotlib
from matplotlib.figure import Figure
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
import sys
from PySide2 import QtGui
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
wid = QtGui.QWidget()
wid.resize(250, 150)
grid = QtGui.QGridLayout()
wid.setLayout(grid)
fig = Figure(figsize=(7,5), dpi=65, facecolor=(1,1,1), edgecolor=(0,0,0))
canvas = FigureCanvas(fig)
grid.addWidget(canvas)
wid.show()
但是,似乎無法識別Figure的簽名。
TypeError:“ PySide2.QtGui.QGridLayout.addWidget”以錯誤的參數類型調用:
PySide2.QtGui.QGridLayout.addWidget(FigureCanvasQTAgg)支持的簽名:
PySide2.QtGui.QGridLayout.addWidget(PySide2.QtGui.QWidget,int,int,PySide2.QtCore.Qt.Alignment = 0)
PySide2.QtGui.QGridLayout.addWidget(PySide2.QtGui.QWidget,int,int,int,int,PySide2.QtCore.Qt.Alignment = 0)
PySide2是Qt5的綁定,因此,您必須使用backend_qt5agg
而不是backend_qt4agg
,另一方面,建議在matplotlib之前導入后端(在這種情況下為PySide2),以便matplotlib在內部配置它,除了QApplication,QWidget和QGridLayout屬於由於Qt5將它們與QtGui分開,因此將其添加到QtWidgets中。最后,當您將部件添加到QGridLayout時,必須在以下參數中指示其位置。
考慮到上述解決方案是
import sys
from PySide2 import QtWidgets
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
wid = QtWidgets.QWidget()
wid.resize(250, 150)
grid = QtWidgets.QGridLayout(wid)
fig = Figure(figsize=(7, 5), dpi=65, facecolor=(1, 1, 1), edgecolor=(0, 0, 0))
canvas = FigureCanvas(fig)
grid.addWidget(canvas, 0, 0)
wid.show()
sys.exit(app.exec_())
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