Per #2883, update logic of parse_file_list_type() function to handle …

…python input strings. Also update pcp_combine to parse the type of input files being read and log non-missing python input files expected.

src/libcode/vx_data2d_factory/parse_file_list.cc

@@ -213,11 +213,18 @@ GrdFileType ftype = FileType_None;
 
 for ( int i=0; i<file_list.n(); i++ )  {
 
+   //
+   //  check for python inputs
+   //
+
+   bool is_python = (file_list[i].find(conf_val_python_xarray) == 0) ||
+                    (file_list[i].find(conf_val_python_numpy)  == 0);
+
    //
    //  skip missing files
    //
 
-   if( !file_exists(file_list[i].c_str()) ) continue;
+   if( !file_exists(file_list[i].c_str()) && !is_python ) continue;
 
    //
    //  get the current file type

src/tools/core/pcp_combine/pcp_combine.cc

@@ -151,6 +151,7 @@ static ConcatString pcp_reg_exp = (string)default_reg_exp;
 
 // Variables for the derive command
 static StringArray  file_list;
+static GrdFileType  file_list_type = FileType_None;
 static StringArray  field_list;
 static StringArray  derive_list;
 
@@ -479,6 +480,11 @@ void process_add_sub_derive_args(const CommandLine & cline) {
    //
    n_files = file_list.n();
 
+   //
+   // Determine the type of input files.
+   //
+   file_list_type = parse_file_list_type(file_list);
+
    return;
 }
 
@@ -1237,7 +1243,12 @@ bool get_field(const char *filename, const char *cur_field,
    ftype = parse_conf_file_type(&config);
 
    //
-   // Check that the file exists.
+   // If not set by the config string, use the file list type.
+   //
+   if(ftype == FileType_None) ftype = file_list_type;
+
+   //
+   // Check for missing non-python input files.
    //
    if(!file_exists(filename) &&
       !is_python_grdfiletype(ftype)) {