MPI Output

For easier MPI output from within Python, we provide the class diverge.mpi_stdout_logger that replaces the standard stdout by a class that only writes if the MPI rank is 0. Notably, this class writes to both a file and stdout, therefore usage is as follows:

import diverge
import sys
stdout_ = sys.stdout
sys.stdout = mpi_stdout_logger( "output_file.dat" )
print( "some stuff" )
sys.stdout = stdout_