Rework of none type fix in regex findings

Author: Franziska Geiger

README.md

@@ -21,7 +21,7 @@ wrapper scripts and makes the implementation usable from shell as standard Pytho
 execute the following command in the project directory:
 
 ```
-mx graalpython -m venv <dir-to-venv>
+mx python -m venv <dir-to-venv>
 ```
 
 To activate the environment in your shell session call:

graalpython/com.oracle.graal.python.test/src/tests/test_re.py

@@ -454,4 +454,5 @@ def test_none_value():
 
     n = next(stream)
     assert not n[0]
+    assert str(n[0]) == 'None'
 

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/object/ObjectBuiltins.java

@@ -300,7 +300,7 @@ String repr(VirtualFrame frame, Object self,
                         @Cached("create(__MODULE__)") GetFixedAttributeNode readModuleNode,
                         @Cached("create(__QUALNAME__)") GetFixedAttributeNode readQualNameNode) {
             if (self == PNone.NONE) {
-                return "";
+                return "None";
             }
             PythonAbstractClass type = getClass.execute(self);
             Object moduleName = readModuleNode.executeObject(frame, type);

graalpython/lib-graalpython/_sre.py

@@ -339,12 +339,15 @@ def __sanitize_out_type(self, elem):
            returned list if always either 'str' or 'bytes'."""
         if self.__binary:
             return bytes(elem)
+        elif elem is None:
+            return None
         else:
             return str(elem)
 
     def finditer(self, string, pos=0, endpos=-1):
         self.__check_input_type(string)
-        if endpos > len(string):
+        # print('String to find iter:' , string)
+        if endpos > len(string) or len(string) == 0:
             endpos = len(string)
         elif endpos < 0:
             endpos = endpos % len(string) + 1