1 files changed, 33 insertions, 0 deletions
diff --git a/lib/Crypto/Util/py3compat.pyi b/lib/Crypto/Util/py3compat.pyi
new file mode 100644
index 0000000..74e04a2
--- /dev/null
+++ b/lib/Crypto/Util/py3compat.pyi
@@ -0,0 +1,33 @@
+from typing import Union, Any, Optional, IO
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+import sys
+
+def b(s: str) -> bytes: ...
+def bchr(s: int) -> bytes: ...
+def bord(s: bytes) -> int: ...
+def tobytes(s: Union[bytes, str]) -> bytes: ...
+def tostr(b: bytes) -> str: ...
+def bytestring(x: Any) -> bool: ...
+
+def is_native_int(s: Any) -> bool: ...
+def is_string(x: Any) -> bool: ...
+def is_bytes(x: Any) -> bool: ...
+
+def BytesIO(b: bytes) -> IO[bytes]: ...
+def StringIO(s: str) -> IO[str]: ...
+
+if sys.version_info[0] == 2:
+    from sys import maxint
+    iter_range = xrange
+
+else:
+    from sys import maxsize as maxint
+    iter_range = range
+
+class FileNotFoundError:
+    def __init__(self, err: int, msg: str, filename: str) -> None:
+        pass
+
+def _copy_bytes(start: Optional[int], end: Optional[int], seq: Buffer) -> bytes: ...