Cleanup: change Python version checks to include newer versions

build_files/cmake/cmake_consistency_check.py

@@ -21,7 +21,7 @@
 # <pep8 compliant>
 
 import sys
-if not sys.version.startswith("3"):
+if sys.version_info.major < 3:
     print("\nPython3.x needed, found %s.\nAborting!\n" %
           sys.version.partition(" ")[0])
     sys.exit(1)

build_files/cmake/project_source_info.py

@@ -25,8 +25,8 @@ __all__ = (
 
 
 import sys
-if not sys.version.startswith("3"):
-    print("\nPython3.x needed, found %s.\nAborting!\n" %
+if not sys.version_info.major < 3:
+    print("\nPython3.x or newer needed, found %s.\nAborting!\n" %
           sys.version.partition(" ")[0])
     sys.exit(1)
 

source/blender/makesrna/rna_cleanup/rna_cleaner.py

@@ -321,7 +321,7 @@ def main():
 
 if __name__ == '__main__':
     import sys
-    if not sys.version.startswith("3"):
-        print("Incorrect python version, use python 3!")
+    if sys.version_info.major < 3:
+        print("Incorrect python version, use Python 3 or newer!")
     else:
         main()