def find_existing_merchant(merchant):

    try:
        return MERCHANT_MODEL.objects.get(name=merchant['name'])
    except:
        return None
Fails if the given variable exists within the current scope.
dataset/ETHPy150Open tryolabs/daywatch/daywatch/core/scraper/item_scraper/pipelines.py/find_existing_merchant--crossover with--dataset/ETHPy150Open shellderp/sublime-robot-plugin/lib/robot/libraries/BuiltIn.py/_Variables.variable_should_not_exist