Add print statement to the top of test_project_python.__init__ mo…

…dule

- simplifies understanding the differences between
  the following commands:
  - `command_name`
  - `command_name_for_function_in__main__`
  - `python3 -m test_project_python`

python/test_project_python/__init__.py

@@ -1,3 +1,5 @@
+print('Entered test_project_python.__init__ :)')
+
 def function_name():
     print('Ran test_project_python.__init__.function_name')
     return True

python/test_project_python/__main__.py

@@ -2,6 +2,18 @@
 
 def function_in__main__():
     print('Ran test_project_python.__main__.function_in__main__')
+    print('''
+    To better understand how commands from the 'console_scripts' key inside
+    the entry_points dictionary in setup.py works, run and compare
+        command_name
+        command_name_for_function_in__main__
+        python3   -m test_project_python        # Linux/macOS
+        python    -m test_project_python        # Windows
+        custom_py -m test_project_python        # if you use a custom alias for python command
+    This assumes you've already installed the package with:
+        pip install test_project_python         # installs from PyPI
+        pip install .                           # installs local version (you need to clone this repo and then run this from the test_project/python directory)
+    ''')
 
 if __name__ == '__main__':
     print('__name__ == "__main__" is True for test_project_python.__main__')