如何使用动态对象名称访问python对象？

Question

I have a question to one of my python scripts. I'm using the library untangle ( https://github.com/stchris/untangle ) to import and convert xml config files into the main script.

The problem: I have user informations in the config file for more than one user and I'm using this information in a loop. It works very well, but it makes the script very ugly due to the name of the generated objects from the xml file.

Concrete this means I can't (or I just don't know how) change the name of the object I would like to use dynamic.

The example code is below:

            if employee == 0:
                if str(configobj.config.modes.employee.employee_1.name.cdata) != '':
                    display.drawtext(0,0,str(configobj.config.modes.employee.employee_1.name.cdata),"7x13B",255,255,255,True)
                    if str(configobj.config.modes.employee.employee_1.line1.cdata) != '':
                        display.drawtext(int(configobj.config.modes.employee.employee_1.line1['x']),
                                         int(configobj.config.modes.employee.employee_1.line1['y']),
                    if str(configobj.config.modes.employee.employee_1.line2.cdata) != '':
                        display.drawtext(int(configobj.config.modes.employee.employee_1.line2['x']),
                                         int(configobj.config.modes.employee.employee_1.line2['y']),
                    if str(configobj.config.modes.employee.employee_1.line3.cdata) != '':
                        display.drawtext(int(configobj.config.modes.employee.employee_1.line3['x']),
                                         int(configobj.config.modes.employee.employee_1.line3['y']))
                    displayimage = True

            elif employee == 1:
                if str(configobj.config.modes.employee.employee_2.name.cdata) != '':
                    display.drawtext(0,0,str(configobj.config.modes.employee.employee_2.name.cdata),"7x13B",255,255,255,True)
                    if str(configobj.config.modes.employee.employee_2.line1.cdata) != '':
                        display.drawtext(int(configobj.config.modes.employee.employee_2.line1['x']),
                                         int(configobj.config.modes.employee.employee_2.line1['y']),
                    if str(configobj.config.modes.employee.employee_2.line2.cdata) != '':
                        display.drawtext(int(configobj.config.modes.employee.employee_2.line2['x']),
                                         int(configobj.config.modes.employee.employee_2.line2['y']),
                    if str(configobj.config.modes.employee.employee_2.line3.cdata) != '':
                        display.drawtext(int(configobj.config.modes.employee.employee_2.line3['x']),
                                         int(configobj.config.modes.employee.employee_2.line3['y']),
                    if str(configobj.config.modes.employee.employee_2.image.cdata) != '':
                        display.showimage(160,0,str(configobj.config.modes.employee.employee_2.image.cdata))
                    displayimage = True

And this is a lot of repeated code with a changing number. How can I improve this?

Answer 1

Use getattr :

getattr(configobj.config.modes.employee, 'employee_' + str(employee + 1)).name.cdata

You can also create separate variable for employee:

employee = getattr(configobj.config.modes.employee, 'employee_' + str(employee + 1))
print(employee.name.cdata)
print(employee.line1['x'])