def profile_ctx(engine='pyinstrument'):
"""
A context manager which profiles the body of the with statement
with the supplied profiling engine and returns the profiling object
in a list.
Arguments
---------
engine: str
The profiling engine, e.g. 'pyinstrument' or 'snakeviz'
Returns
-------
sessions: list
A list containing the profiling session.
"""
if engine == 'pyinstrument':
from pyinstrument import Profiler
prof = Profiler()
prof.start()
elif engine == 'snakeviz':
prof = Profile()
prof.enable()
elif engine is None:
pass
sessions = []
yield sessions
if engine == 'pyinstrument':
sessions.append(prof.stop())
elif engine == 'snakeviz':
prof.disable()
sessions.append(prof)
