Python: Copy Python extractor to codeql repo

python/extractor/tests/parser/strings_new.py

@@ -0,0 +1,30 @@
+if 1:
+    fr"this is not a unicode escape but an interpolation: \N{AMPERSAND}"
+if 2:
+    f'also an interpolation: \\N{AMPERSAND}'
+if 3:
+    f'\\Nspam'
+if 4:
+    f"this is a unicode escape: \N{AMPERSAND}"
+if 5:
+    r"this is also not a unicode escape: \N{AMPERSAND}"
+if 6:
+    '\\N{AMPERSAND}'
+if 7:
+    '\\Nspam'
+if 8:
+    "this is also also a unicode escape: \N{AMPERSAND}"
+if 9:
+    rb"this is also not a unicode escape: \N{AMPERSAND}"
+if 10:
+    b'\\N{AMPERSAND}'
+if 11:
+    b'\\Nspam'
+if 12:
+    b"this is not a unicode escape because we are in a bytestring: \N{AMPERSAND}"
+if 13:
+    fr"""quotes before interpolation "{0}" are okay."""
+if 14:
+    fr"""backslash before an interpolation \{1}\ are okay."""
+if 15:
+    f"Yield inside an f-string: {yield 5} is allowed."