writing_python_scripts/questions.rst
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Objective Questions
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 1. Which of the following variables contains the locations to search for
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    python modules
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   a. sys.pythonpath
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   #. sys.path
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   #. os.pythonpath
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   #. os.path
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   Answer: sys.path
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 2. What is the type of ``sys.path``
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   a. list of strings
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   #. list of int
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   #. string
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   #. tuple of strings
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   Answer: list of strings
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 3. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
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    the following code:
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      def show(x):
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          print x
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      show("Hello World")
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      if __name__ == "__main__":
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          show("Hello Test")
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    How do you import the file.
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   a. import utils
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   #. import utils.py
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   #. import /home/user/utils
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   #. import /home/user/utils.py
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   Answer: import utils
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 4. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
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    the following code:
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      def show(x):
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          print x
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      show("Hello World")
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      if __name__ == "__main__":
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          show("Hello Test")
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    How do you use the ``show`` function after doing ``import utils``
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   a. utils.show("hey")
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   #. show("hey")
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   #. utils.py.show("hey")
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   #. utils.py.show.py("hey")
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   Answer: utils.show("hey")
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 5. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
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    the following code:
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      def show(x):
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          print x
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      show("Hello World")
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      if __name__ == "__main__":
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          show("Hello Test")
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    How do you use the ``show`` function after doing ``from utils import show``
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   a. utils.show("hey")
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   #. show("hey")
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   #. utils.py.show("hey")
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   #. utils.py.show.py("hey")
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   Answer: show("hey")
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 5. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
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    the following code:
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      def show(x):
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          print x
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      show("Hello World")
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      if __name__ == "__main__":
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          show("Hello Test")
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    What is printed when you do ``import utils``
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   Answer::
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      Hello World
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 6. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
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    the following code:
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      def show(x):
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          print x
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      show("Hello World")
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      if __name__ == "__main__":
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          show("Hello Test")
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    What is printed when the script is executed.
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   Answer::
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      Hello World
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      Hello Test
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 7. Say, we wish to use the ``pi`` value from the ``math`` module in
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    the standard library. How do we import it?
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    Answer: from math import pi  OR import math.pi OR 
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            import math.pi as pi
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  8. A module should contain only functions, True or False?
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     Answer: False.
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Larger Questions
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----------------
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1. Look at the python documentation (from the web) and learn how to
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   make a folder containing some python files into a module.
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   Answer: Add a file named __init__.py
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2. We know that ``sys.path`` has the paths in which Python checks for
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   a module, when it is imported. Suppose you have a package ``utils``
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   in some location on your disk, which is not on the python path, how
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   will you import it?
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   Answer: Append that path to the ``sys.path`` variable.