Add relative import and fix absolute import

README.md

@@ -68,6 +68,12 @@ You can also run the examples from the command line. For example, to run the
 python examples/A01_introduction/hello_world.py
 ```
 
+To see how relative imports work within packages, run the `import_relative.py` example using the `-m` flag:
+
+```bash
+python -m examples.A21_import_system.import_relative
+```
+
 
 ## License
 

examples/A21_import_system/import_absolute.py

@@ -1,12 +1,11 @@
 # Shows how to enforce and use absolute imports.
 # ------------------------------------------------------------------------------
 # Example script demonstrating absolute imports.
+from __future__ import absolute_import
+
 # Using absolute imports
 import asyncio
 
-# Enforce absolute imports
-from __future__ import absolute_import
-
 # Absolute imports
 from foo.api.submodule1 import func1
 from foo.core.submodule2 import func2

examples/A21_import_system/import_relative.py

@@ -0,0 +1,11 @@
+# Shows how to use relative imports within a package.
+# ------------------------------------------------------------------------------
+# Demonstrates importing modules from the current package using relative syntax.
+
+from .foo.api.submodule1 import func1
+from .foo.core.submodule2 import func2
+# Relative imports are scoped to packages.
+
+# Call the imported functions
+func1()
+func2()