from qgis.core import *
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from qgis.gui import *
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from qgis.PyQt.QtGui import (QColor)
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# QgsApplication.setPrefixPath("e:/", True)
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qgs = QgsApplication([], True)
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qgs.initQgis()
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# 创建实例
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project = QgsProject.instance()
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project.read(r'E:/data/1.Natural_Earth/Test.qgz')
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print("FileName: " + project.fileName())
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# canvas = QgsMapCanvas()
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# canvas.show()
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# bridge = QgsLayerTreeMapCanvasBridge(QgsProject.instance().layerTreeRoot(), canvas)
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layers_list = {}
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for layer in project.mapLayers().values():
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layers_list[layer.name()] = layer
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print(layers_list)
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openStreetMapLayer = project.mapLayersByName("OpenStreetMap")[0]
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print(openStreetMapLayer)
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root = project.layerTreeRoot()
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print(root.findLayerIds()[0])
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# 保存，另存为
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# project.write()
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# project.write("E:/new_qgis_project.qgz")
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# qgs.exitQgis()
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