Add python led programs

pyleds/lib/ProgramLoading.py

@@ -0,0 +1,40 @@
+from os import scandir
+from lib.Litsimaja import Litsimaja
+from lib.Program import Program
+
+
+def resolve(namespace: str, class_name: str):
+    m_name = 'program.' + namespace + '.' + class_name
+    module = __import__(m_name, None, None, [m_name])
+    return module
+
+
+def run(namespace: str, class_name: str, lm: Litsimaja, logger, args: [] = None):
+    module = resolve(namespace, class_name)
+    loaded_class = getattr(module, class_name)
+    program = loaded_class(lm)
+    logger.info('Loaded "' + module.name() + '" from ' + namespace + '.' + class_name + ' with args: ' + repr(args))
+    lm.add_loop(program.get_loop())
+    program.run(args)
+
+
+def list_all(grouped: bool = False):
+    all_programs = []
+    programs = []
+    for entry in scandir('program'):
+        if entry.is_dir():
+            for file in scandir('program/' + entry.name):
+                if file.is_file() and file.name[-3:] == '.py':
+                    try:
+                        program_name = file.name[: -3]
+                        module = resolve(entry.name, program_name)
+                        if hasattr(module, program_name) and issubclass(getattr(module, program_name), Program):
+                            programs.append({'prg': entry.name + '.' + program_name, 'name': module.name()})
+                    except AttributeError:
+                        continue
+            if grouped and len(programs) > 0:
+                all_programs.append({'group': entry.name, 'programs': programs})
+                programs = []
+    if not grouped:
+        all_programs = programs
+    return all_programs