Per #1753, there are 3 calls to the user's python version throughout …

…MET. Update all 3 to print consistent log message when writing/reading the temp file. In particular, print the system command that is being executed at Debug(4) to make it easier to replicate python embedding problems that may arise.

met/src/basic/vx_util/python_line.cc

@@ -242,8 +242,8 @@ sublist = PyList_GetItem(main_list, index);
 
 if ( ! sublist )  {
 
-   mlog << Error
-        << "\n\n  PyLineDataFile::make_data_line() -> nul sublist pointer!\n\n";
+   mlog << Error << "\nPyLineDataFile::make_data_line() ->"
+        << "nul sublist pointer!\n\n";
 
    exit ( 1 );
 
@@ -255,8 +255,8 @@ if ( ! sublist )  {
 
 if ( ! PyList_Check(sublist) )  {
 
-   mlog << Error
-        << "\n\n  PyLineDataFile::make_data_line() -> python object is not a list!\n\n";
+   mlog << Error << "\nPyLineDataFile::make_data_line() ->"
+        << "python object is not a list!\n\n";
 
    exit ( 1 );
 
@@ -336,8 +336,7 @@ if ( PyErr_Occurred() )  {
 
    PyErr_Print();
 
-   mlog << Error
-        << "\nPyLineDataFile::do_straight() -> "
+   mlog << Error << "\nPyLineDataFile::do_straight() -> "
         << "an error occurred importing module "
         << '\"' << user_base.text() << "\"\n\n";
 
@@ -411,6 +410,9 @@ for (j=0; j<N; ++j)  {
 
 };
 
+mlog << Debug(4) << "Writing temporary Python line data file:\n\t"
+     << command << "\n";
+
 status = system(command.text());
 
 if ( status )  {
@@ -429,14 +431,17 @@ wrapper = generic_pickle_wrapper;
 
 script = new Python3_Script (wrapper.text());
 
+mlog << Debug(4) << "Reading temporary Python line data file: "
+     << pickle_path << "\n";
+
 script->read_pickle(list_name, pickle_path.text());
 
 main_list = script->lookup(list_name);
 
 if ( ! main_list )  {
 
-   mlog << Error
-        << "\n\n  PyLineDataFile::do_pickle() -> nul main list pointer!\n\n";
+   mlog << Error << "\nPyLineDataFile::do_pickle() ->"
+        << "nul main list pointer!\n\n";
 
    exit ( 1 );
 

met/src/libcode/vx_data2d_python/python_dataplane.cc

@@ -317,6 +317,9 @@ for (j=1; j<user_script_argc; ++j)  {   //  j starts at one, here
 
 }
 
+mlog << Debug(4) << "Writing temporary Python dataplane file:\n\t"
+     << command << "\n";
+
 status = system(command.text());
 
 if ( status )  {
@@ -353,9 +356,6 @@ if ( PyErr_Occurred() )  {
 
 }
 
-mlog << Debug(3) << "Reading temporary tmp_nc file: "
-     << tmp_nc_path << "\n";
-
    //
    //  set the arguments
    //
@@ -370,6 +370,9 @@ wa.set(a);
 
 PySys_SetArgv (wa.wargc(), wa.wargv());
 
+mlog << Debug(4) << "Reading temporary Python dataplane file: "
+     << tmp_nc_path << "\n";
+
    //
    //  import the python wrapper script as a module
    //

met/src/tools/other/ascii2nc/python_handler.cc

@@ -361,6 +361,9 @@ for (j=0; j<N; ++j)  {
 
 };
 
+mlog << Debug(4) << "Writing temporary Python ascii observation file:\n\t"
+     << command << "\n";
+
 status = system(command.text());
 
 if ( status )  {
@@ -379,6 +382,9 @@ wrapper = generic_python_wrapper;
 
 Python3_Script script(wrapper.text());
 
+mlog << Debug(4) << "Reading temporary Python ascii observation file: "
+     << tmp_ascii_path << "\n";
+
 script.import_read_tmp_ascii_py();
 
 PyObject * dobj = script.read_tmp_ascii(tmp_ascii_path.text());