# pyats shell > Start a pre-loaded pyATS interactive Python Shell to save time in prototyping. > More information: . - Open pyATS shell with a defined Testbed file: `pyats shell --testbed-file {{path/to/testbed.yaml}}` - Open pyATS shell with a defined Pickle file: `pyats shell --pickle-file {{path/to/pickle.file}}` - Open pyATS with IPython disabled: `pyats shell --no-ipython`