ch04

ch04/docstrings.py

@@ -0,0 +1,24 @@
+# docstrings.py
+def square(n):
+    """Return the square of a number n. """
+    return n ** 2
+
+def get_username(userid):
+    """Return the username of a user given their id. """
+    return db.get(user_id=userid).username
+
+
+def connect(host, port, user, password):
+    """Connect to a database.
+
+    Connect to a PostgreSQL database directly, using the given
+    parameters.
+
+    :param host: The host IP.
+    :param port: The desired port.
+    :param user: The connection username.
+    :param password: The connection password.
+    :return: The connection object.
+    """
+    # body of the function here...
+    return connection