我正在尝试学习 matplotlib 并尝试测试以下代码。
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()
不过好像不认识Figure的签名。
TypeError: 'PySide2.QtGui.QGridLayout.addWidget' called with wrong argument types:
PySide2.QtGui.QGridLayout.addWidget(FigureCanvasQTAgg) Supported signatures:
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)
最佳答案
PySide2 是 Qt5 的绑定(bind),因此您必须使用 backend_qt5agg
而不是 backend_qt4agg
,另一方面,建议在导入后端(本例中为 PySide2)之前matplotlib 以便 matplotlib 在内部对其进行配置,除了 QApplication 之外,QWidget 和 QGridLayout 属于 QtWidgets,因为 Qt5 将它们与 QtGui 分开,最后当您将一个小部件添加到 QGridLayout 时,您必须在以下参数中指明其位置。
考虑到上面的解决方案是
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_())
关于python - 如何使用 PySide2 在 matplotlib 中显示图形?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57238618/