use logging package for output, and remove 'verbose' options

opencl_fdfd/ops.py

@@ -8,6 +8,7 @@ See kernels/ for any of the .cl files loaded in this file.
 """
 
 from typing import List, Callable
+import logging
 
 import numpy
 import jinja2
@@ -18,6 +19,8 @@ from pyopencl.elementwise import ElementwiseKernel
 from pyopencl.reduction import ReductionKernel
 
 
+logger = logging.getLogger(__name__)
+
 # Create jinja2 env on module load
 jinja_env = jinja2.Environment(loader=jinja2.PackageLoader(__name__, 'kernels'))
 
@@ -145,6 +148,11 @@ def create_a(context: pyopencl.Context,
         e2 = H2E_kernel(E, H, oeps, Pl, pec, *idxes[1], wait_for=[e2])
         return [e2]
 
+    logger.debug('Preamble: \n{}'.format(preamble))
+    logger.debug('p2e: \n{}'.format(p2e_source))
+    logger.debug('e2h: \n{}'.format(e2h_source))
+    logger.debug('h2e: \n{}'.format(h2e_source))
+
     return spmv