Bugfix 2428 python embedding with MET_PYTHON_EXE defined

data/wrappers/Makefile.am

@@ -24,8 +24,10 @@ wrappers_DATA = \
      set_python_env.py \
      read_tmp_dataplane.py \
      read_tmp_ascii.py \
+     read_tmp_point_nc.py \
      write_tmp_dataplane.py \
      write_tmp_point.py \
+     write_tmp_point_nc.py \
      write_tmp_mpr.py
 
 EXTRA_DIST = ${wrappers_DATA}

data/wrappers/Makefile.in

@@ -360,8 +360,10 @@ wrappers_DATA = \
      set_python_env.py \
      read_tmp_dataplane.py \
      read_tmp_ascii.py \
+     read_tmp_point_nc.py \
      write_tmp_dataplane.py \
      write_tmp_point.py \
+     write_tmp_point_nc.py \
      write_tmp_mpr.py
 
 EXTRA_DIST = ${wrappers_DATA}

data/wrappers/read_tmp_point_nc.py

@@ -0,0 +1,26 @@
+########################################################################
+#
+#    Reads temporary point obs. file into memory.
+#
+#    usage:  /path/to/python read_tmp_point_nc.py tmp_output_filename
+#
+########################################################################
+
+import os
+import sys
+
+# add share/met/python directory to system path to find met_point_obs
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                             os.pardir, 'python')))
+from met_point_obs import met_point_obs
+from met_point_obs_nc import nc_point_obs
+
+netcdf_filename = sys.argv[1]
+
+# read NetCDF file
+print('{p}  reading{f}'.format(p=met_point_obs.get_prompt(), f=netcdf_filename))
+point_obs_data = nc_point_obs()
+point_obs_data.read_data(netcdf_filename)
+
+met_point_data = point_obs_data.get_point_data() 
+met_point_data['met_point_data'] = point_obs_data

data/wrappers/write_tmp_point_nc.py

@@ -0,0 +1,55 @@
+########################################################################
+#
+#    Adapted from a script provided by George McCabe
+#    Adapted by Howard Soh
+#
+#    usage:  /path/to/python write_tmp_point_nc.py \
+#            tmp_output_filename <user_python_script>.py <args>
+#
+########################################################################
+
+import os
+import sys
+import importlib.util
+
+# add share/met/python directory to system path to find met_point_obs
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                             os.pardir, 'python')))
+
+from met_point_obs import met_point_obs
+from met_point_obs_nc import nc_point_obs
+
+PROMPT = met_point_obs.get_prompt()
+print("{p} Python Script:\t".format(p=PROMPT)  + repr(sys.argv[0]))
+print("{p} User Command:\t".format(p=PROMPT)   + repr(' '.join(sys.argv[2:])))
+print("{p} Temporary File:\t".format(p=PROMPT) + repr(sys.argv[1]))
+
+tmp_filename = sys.argv[1]
+pyembed_module_name = sys.argv[2]
+sys.argv = sys.argv[2:]
+
+# append user script dir to system path
+pyembed_dir, pyembed_file = os.path.split(pyembed_module_name)
+if pyembed_dir:
+    sys.path.insert(0, pyembed_dir)
+
+if not pyembed_module_name.endswith('.py'):
+    pyembed_module_name += '.py'
+
+user_base = os.path.basename(pyembed_module_name).replace('.py','')
+
+spec = importlib.util.spec_from_file_location(user_base, pyembed_module_name)
+met_in = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(met_in)
+
+if hasattr(met_in, 'point_obs_data'):
+    met_in.point_obs_data.save_ncfile(tmp_filename)
+else:
+    if hasattr(met_in.met_point_data, 'point_obs_data'):
+        met_in.met_point_data['point_obs_data'].save_ncfile(tmp_filename)
+    else:
+        tmp_point_obs = nc_point_obs()
+        tmp_point_obs.put_data(met_in.met_point_data)
+        tmp_point_obs.save_ncfile(tmp_filename)
+
+#print('{p} writing {f}'.format(p=PROMPT, f=tmp_filename))

internal/test_unit/xml/unit_python.xml

@@ -495,6 +495,25 @@
     </output>
   </test>
 
+  <!-- Invokes user-python logic to read a point obs -->
+  <test name="python_point2grid_pb2nc_TMP_user_python">
+    <exec>&MET_BIN;/point2grid</exec>
+    <env>
+      <pair><name>MET_PYTHON_EXE</name> <value>&MET_PYTHON_EXE;</value></pair>
+    </env>
+    <param> \
+      'PYTHON_NUMPY=&MET_BASE;/python/read_met_point_obs.py &OUTPUT_DIR;/pb2nc/ndas.20120409.t12z.prepbufr.tm00.nc' \
+      G212 \
+      &OUTPUT_DIR;/python/pb2nc_TMP_user_python.nc \
+      -field 'name="TMP"; level="*"; valid_time="20120409_120000"; censor_thresh=[ &lt;0 ]; censor_val=[0];' \
+      -name TEMP \
+      -v 1
+    </param>
+    <output>
+      <grid_nc>&OUTPUT_DIR;/python/pb2nc_TMP_user_python.nc</grid_nc>
+    </output>
+  </test>
+
   <test name="python_plot_point_obs_with_point_data">
     <exec>&MET_BIN;/plot_point_obs</exec>
     <env>

scripts/python/Makefile.am

@@ -27,6 +27,7 @@ pythonscriptsdir = $(pkgdatadir)/python
 
 pythonscripts_DATA = \
 	met_point_obs.py \
+	met_point_obs_nc.py \
 	read_ascii_numpy.py \
 	read_ascii_numpy_grid.py \
 	read_ascii_xarray.py \

scripts/python/Makefile.in

@@ -299,6 +299,7 @@ top_srcdir = @top_srcdir@
 pythonscriptsdir = $(pkgdatadir)/python
 pythonscripts_DATA = \
 	met_point_obs.py \
+	met_point_obs_nc.py \
 	read_ascii_numpy.py \
 	read_ascii_numpy_grid.py \
 	read_ascii_xarray.py \