Python & WLST / Undeploy Application If Exist (WebLogic)

Question

I want to run the undeploy only if the application already deployed, if there is no application I'm looking for, I want to pass this part. I think I can do this by first making a list of all applications and then using an if else block if the application exist I'm looking for in this list. But how can I combine WLST and Python for that matter? At the same time, if an error occurs during undeploy, I want to print this error in the exception section.

Edit: "I am getting the applicationName parameter from another file. You can also use this parameter.

And as far as I researched, I can find the deployed application list as follows:

listAppDeployments = cmo.getAppDeployments()

So if applicationName is in listAppDeployments then undeploy should work, otherwise I want to skip this function but I couldn't merge it."

def undeploy() :
    try:
        conn()
        edit()
        startEdit()
        print 'Something here...'
        stopApplication(applicationName)
        print 'Something here...'
        print 'Something here...'
        undeploy(applicationName)
        print 'Something here...'
        save()
        activate()
    except:
        print 'Something here...'

Thanks.