check min. python version; os.uname is not available on windows

Author: zdenop

src/training/tesstrain.py

@@ -18,6 +18,8 @@
 #
 import sys, os, logging
 
+if (sys.version_info.major < 3) or (sys.version_info.major == 3 and sys.version_info.minor < 6):
+    raise Exception("Must be using Python minimum version 3.6!")
 
 sys.path.insert(0, os.path.dirname(__file__))
 from tesstrain_utils import (

src/training/tesstrain_utils.py

@@ -15,6 +15,7 @@
 #
 
 import os
+import platform
 import sys
 from datetime import date
 from tempfile import TemporaryDirectory, mkdtemp
@@ -37,7 +38,7 @@
 
 class TrainingArgs(argparse.Namespace):
     def __init__(self):
-        self.uname = os.uname().sysname.lower()
+        self.uname = platform.uname().system.lower()
         self.lang_code = "eng"
         self.timestamp = str(date.today())