PlasmaCalcs.hookups.eppic.eppic_io_tools.n_mpi_processors

PlasmaCalcs.hookups.eppic.eppic_io_tools.n_mpi_processors(dir='.')
return number of mpi processors used to run the run at this directory.
searches all jobfiles (see find_jobfiles) to determine number of processors,
from line like “MPI STARTING N PROCESSORS” with N an integer.
if result is ambiguous (different N from multiple places), raise a FileContentsConflictError.
if no jobfiles found, raise FileNotFoundError.
if some jobfiles found but none tell us how many processors were used, raise FileContentsMissingError.