Objective Questions

-------------------

 1. Which of the following variables contains the locations to search for

    python modules

   a. sys.pythonpath

   #. sys.path

   #. os.pythonpath

   #. os.path

   Answer: sys.path

 2. What is the type of ``sys.path``

   a. list of strings

   #. list of int

   #. string

   #. tuple of strings

   Answer: list of strings

 3. The script ``utils.py`` is in one of locations of PYTHONPATH and contains

    the following code:

      def show(x):

          print x

      show("Hello World")

      if __name__ == "__main__":

          show("Hello Test")

    How do you import the file.

   a. import utils

   #. import utils.py

   #. import /home/user/utils

   #. import /home/user/utils.py

   Answer: import utils

 4. The script ``utils.py`` is in one of locations of PYTHONPATH and contains

    the following code:

      def show(x):

          print x

      show("Hello World")

      if __name__ == "__main__":

          show("Hello Test")

    How do you use the ``show`` function after doing ``import utils``

   a. utils.show("hey")

   #. show("hey")

   #. utils.py.show("hey")

   #. utils.py.show.py("hey")

   Answer: utils.show("hey")

 5. The script ``utils.py`` is in one of locations of PYTHONPATH and contains

    the following code:

      def show(x):

          print x

      show("Hello World")

      if __name__ == "__main__":

          show("Hello Test")

    How do you use the ``show`` function after doing ``from utils import show``

   a. utils.show("hey")

   #. show("hey")

   #. utils.py.show("hey")

   #. utils.py.show.py("hey")

   Answer: show("hey")

 5. The script ``utils.py`` is in one of locations of PYTHONPATH and contains

    the following code:

      def show(x):

          print x

      show("Hello World")

      if __name__ == "__main__":

          show("Hello Test")

    What is printed when you do ``import utils``

   Answer::

      Hello World

 6. The script ``utils.py`` is in one of locations of PYTHONPATH and contains

    the following code:

      def show(x):

          print x

      show("Hello World")

      if __name__ == "__main__":

          show("Hello Test")

    What is printed when the script is executed.

   Answer::

      Hello World

      Hello Test

 7. Say, we wish to use the ``pi`` value from the ``math`` module in

    the standard library. How do we import it?

    Answer: from math import pi  OR import math.pi OR 

            import math.pi as pi

  8. A module should contain only functions, True or False?

     Answer: False.

Larger Questions

----------------

1. Look at the python documentation (from the web) and learn how to

   make a folder containing some python files into a module.

   Answer: Add a file named __init__.py

2. We know that ``sys.path`` has the paths in which Python checks for

   a module, when it is imported. Suppose you have a package ``utils``

   in some location on your disk, which is not on the python path, how

   will you import it?

   Answer: Append that path to the ``sys.path`` variable.