has_python: allow user to disable persistently

Author: scivision

+stdlib/has_python.m

@@ -3,6 +3,16 @@
 % https://www.mathworks.com/support/requirements/python-compatibility.html
 
 function y = has_python(enable_check)
+% arguments
+%   enable_check (1,1) logical = ~stdlib.matlabOlderThan('R2022a');
+% end
+
+persistent py_enable
+
+if ~isempty(py_enable) && nargin == 0
+  y = py_enable;
+  return
+end
 
 y = false;
 
@@ -14,6 +24,8 @@
   y = ~isempty(stdlib.python_version());
 end
 
+py_enable = y;
+
 end
 
 %!assert(~stdlib.has_python())