Add configuration file with hints for TCP connection handling in Python.

Author: rohitpaulk

solutions/python/02-rg2/config.yml

@@ -0,0 +1,34 @@
+hints:
+  - title_markdown: "How do I access the client's TCP connection?"
+    body_markdown: |-
+      This is returned by the [`accept()`](https://docs.python.org/3/library/socket.html#socket.socket.accept) method.
+
+      ```python
+      # The return value includes the client's connection (a `Socket` object) and the client's address (which we ignore)
+      connection, _ = server_socket.accept()
+      ```
+
+      The above code uses `_` to ignore the second return value, which is the client's address (a tuple of the IP address and port number).
+
+  - title_markdown: "How do I read the client's PING command?"
+    body_markdown: |-
+      Use the [`recv()`](https://docs.python.org/3/library/socket.html#socket.socket.recv) method to read the client's command:
+
+      ```python
+      # Read 14 bytes from the client's connection
+      connection.recv(14)
+      ```
+
+      The PING command is 14 bytes long when encoded as RESP: `*1\r\n$4\r\nPING\r\n` (you'll learn about RESP in later stages).
+
+  - title_markdown: "How do I send the response to the client?"
+    body_markdown: |-
+      Use the [`sendall()`](https://docs.python.org/3/library/socket.html#socket.socket.sendall) method on the client's connection for this:
+
+      ```python
+      # Send the response to the client
+      connection.sendall(b"+PONG\r\n")
+      ```
+
+      - The above code uses `b` to convert the string to a [bytes object](https://docs.python.org/3/library/stdtypes.html#bytes).
+      - `+PONG\r\n` is the string "PONG" encoded as a [RESP simple string](https://redis.io/docs/latest/develop/reference/protocol-spec/#simple-strings).