Question

我正在为qgis编写插件。在这个插件中，我需要查询数据库，并尝试使用pymysql。当我尝试在Qgis中安装插件时，消息错误为：ModuleNotFoundError：没有名为“ pymysql”的模块。 Pymsql已正确安装，并且通常可以正常运行，而且我确定在代码中导入了该模块。这是我使用数据库连接的代码部分。我的代码是否有问题，或者在Qgis插件中无法使用pymysql？

retrive = "SELECT DISTINCT ID FROM `beni` Join relazioni ON beni.ID = relazioni.IDR WHERE relazioni.data="+dataInizio

#database connection
connection = pymysql.connect(host="localhost",user="root",passwd="",database="mydb",port=3308 )
cursor = connection.cursor()

if connection.open:
  #execute query
  cursor.execute(retrive)
  rows = cursor.fetchall()

  if not rows:
    self.iface.messageBar().pushMessage(
    'Success', "rows is empty", level=Qgis.Success)
  else:
    #create Qgis Expression
    seperator = ', '
    rowsString=seperator.join(rows)
    expr = QgsExpression( "id in ("+rowsString+")")
    cLayer = iface.mapCanvas().currentLayer()
    it = cLayer.getFeatures( QgsFeatureRequest( expr ) )
    ids = [i.id() for i in it]

    #select by ids and load style
    cLayer.selectByIds(ids)
    cLayer.loadNamedStyle(selectedStyle)
    cLayer.triggerRepaint()

connection.close()

QGIS插件ModuleNotFoundError：没有名为“ pymysql”的模块

0 个答案: