Dynamic runtime adaptations are a key feature for long-running applications. One of the most used languages for writing this kind of applications is Java, due to its reflection features, popularity and dynamism. However, as dynamic scripting languages (such as Python and Javascript) increase in popularity, it is desirable to be able to conceive long-running applications with them too. This paper introduces iPOPO and Pelix, a Python-based service-oriented component model and dynamic service platform respectively, which are inspired on two popular Java technologies for the development of long-running applications: the iPOJO component model and the OSGi Service Platform. To illustrate the approach, a usage of iPOPO and Pelix is presented on the context of mediation software.