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FRETBursts is a python package for burst analysis of confocal single-molecule FRET (smFRET) data.  \subsection{Installation}  FRETBursts is a standard python package that requires the "scipy stack" to be installed.  The "scipy stack" is stack", a  set of corepython packages for  scientific computing and easiest way to install it python packages.  The "scipy stack"  is easily installed  through a free scientific python distribution such as Continuun Anaconda.  FRETBursts can be installed as Continuum Anaconda, although some advanced user may prefer  a normal python package through the standard python package manager (PIP) with   \verb|pip install fretbursts|.  Alternatively the latest development version can be installed from GitHub. manual installation.  FRETBursts can be installed through the standard python package manager (PIP) with   the command \verb|pip install fretbursts|. Alternatively the latest development version can be installed from GitHub.  For more information on different installation methods see the \href{http://fretbursts.readthedocs.org/installation.html#installation}{FRETBursts documentation}.  \subsection{Executing FRETBursts}  For interactive work, we strongly encourage to use FRETBursts through the IPython Notebook environment. All the FRETBursts tutorials are ipython notebook documents, and a quick way to start a new analysis is copying a pre-existing FRETBursts notebook and modifying it.  To import FRETBursts in an interactive shell or in a script we suggest the convention \verb|import fretbursts as fbs|.