Make sys.implementation more compatible with CPython

Author: steve-s

graalpython/com.oracle.graal.python.test/src/tests/unittest_tags/test_sys.txt

@@ -18,6 +18,7 @@
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_dlopenflags
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_executable
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_exit
+*graalpython.lib-python.3.test.test_sys.SysModuleTest.test_implementation
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_getallocatedblocks
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_getandroidapilevel
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_getdefaultencoding

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/PythonLanguage.java

@@ -119,6 +119,8 @@ public final class PythonLanguage extends TruffleLanguage<PythonContext> {
     public static final int MAJOR = 3;
     public static final int MINOR = 8;
     public static final int MICRO = 5;
+    // Note: update hexversion in sys.py when updating release level
+    public static final String RELEASE_LEVEL = "alpha";
     public static final String VERSION = MAJOR + "." + MINOR + "." + MICRO;
 
     public static final String MIME_TYPE = "text/x-python";

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/SysModuleBuiltins.java

@@ -146,7 +146,7 @@ public void initialize(PythonCore core) {
         builtinConstants.put("path", core.factory().createList());
         builtinConstants.put("builtin_module_names", core.factory().createTuple(core.builtinModuleNames()));
         builtinConstants.put("maxsize", MAXSIZE);
-        builtinConstants.put("version_info", core.factory().createTuple(new Object[]{PythonLanguage.MAJOR, PythonLanguage.MINOR, PythonLanguage.MICRO, "dev", 0}));
+        builtinConstants.put("version_info", core.factory().createTuple(new Object[]{PythonLanguage.MAJOR, PythonLanguage.MINOR, PythonLanguage.MICRO, PythonLanguage.RELEASE_LEVEL, 0}));
         builtinConstants.put("version", PythonLanguage.VERSION +
                         " (" + COMPILE_TIME + ")" +
                         "\n[Graal, " + Truffle.getRuntime().getName() + ", Java " + System.getProperty("java.version") + "]");

graalpython/lib-graalpython/sys.py

@@ -56,7 +56,7 @@ def make_implementation_info():
 del make_implementation_info
 del __gmultiarch
 version_info = implementation.version
-hexversion = ((version_info.major << 24) |
+implementation.hexversion = hexversion = ((version_info.major << 24) |
               (version_info.minor << 16) |
               (version_info.micro << 8) |
               (0xa << 4) | # 0xA is alpha, 0xB is beta, 0xC is rc, 0xF is final