st-scripts: writing_python_scripts/questions.rst@78d20cd87c7e (annotated)

296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	1	Objective Questions
641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	2	-------------------
641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	3
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	4	1. Which of the following variables contains the locations to search for
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	5	python modules
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	6
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	7	a. sys.pythonpath
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	8	#. sys.path
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	9	#. os.pythonpath
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	10	#. os.path
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	11
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	12	Answer: sys.path
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	13
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	14	2. What is the type of ``sys.path``
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	15
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	16	a. list of strings
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	17	#. list of int
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	18	#. string
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	19	#. tuple of strings
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	20
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	21	Answer: list of strings
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	22
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	23	3. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	24	the following code:
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	25
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	26	def show(x):
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	27	print x
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	28
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	29	show("Hello World")
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	30
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	31	if __name__ == "__main__":
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	32
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	33	show("Hello Test")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	34
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	35	How do you import the file.
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	36
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	37	a. import utils
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	38	#. import utils.py
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	39	#. import /home/user/utils
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	40	#. import /home/user/utils.py
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	41
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	42	Answer: import utils
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	43
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	44	4. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	45	the following code:
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	46
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	47	def show(x):
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	48	print x
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	49
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	50	show("Hello World")
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	51
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	52	if __name__ == "__main__":
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	53
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	54	show("Hello Test")
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	55
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	56	How do you use the ``show`` function after doing ``import utils``
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	57
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	58	a. utils.show("hey")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	59	#. show("hey")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	60	#. utils.py.show("hey")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	61	#. utils.py.show.py("hey")
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	62
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	63	Answer: utils.show("hey")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	64
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	65	5. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	66	the following code:
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	67
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	68	def show(x):
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	69	print x
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	70
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	71	show("Hello World")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	72
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	73	if __name__ == "__main__":
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	74
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	75	show("Hello Test")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	76
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	77	How do you use the ``show`` function after doing ``from utils import show``
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	78
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	79	a. utils.show("hey")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	80	#. show("hey")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	81	#. utils.py.show("hey")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	82	#. utils.py.show.py("hey")
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	83
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	84	Answer: show("hey")
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	85
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	86	5. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	87	the following code:
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	88
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	89	def show(x):
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	90	print x
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	91
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	92	show("Hello World")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	93
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	94	if __name__ == "__main__":
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	95
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	96	show("Hello Test")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	97
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	98	What is printed when you do ``import utils``
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	99
641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	100	Answer::
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	101	Hello World
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	102
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	103	6. The script ``utils.py`` is in one of locations of PYTHONPATH and contains
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	104	the following code:
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	105
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	106	def show(x):
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	107	print x
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	108
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	109	show("Hello World")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	110
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	111	if __name__ == "__main__":
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	112
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	113	show("Hello Test")
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	114
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	115	What is printed when the script is executed.
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	116
641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	117	Answer::
335 d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	118	Hello World
d5248a15274c Finished writing_python_scripts Nishanth <nishanth@fossee.in> parents: 296 diff changeset	119	Hello Test
296 641a6ee868c0 made the script writing_python_scripts into new form Nishanth <nishanth@fossee.in> parents: diff changeset	120
465 78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	121	7. Say, we wish to use the ``pi`` value from the ``math`` module in
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	122	the standard library. How do we import it?
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	123
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	124	Answer: from math import pi OR import math.pi OR
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	125	import math.pi as pi
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	126
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	127
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	128	8. A module should contain only functions, True or False?
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	129
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	130	Answer: False.
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	131
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	132
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	133	Larger Questions
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	134	----------------
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	135
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	136	1. Look at the python documentation (from the web) and learn how to
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	137	make a folder containing some python files into a module.
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	138
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	139	Answer: Add a file named __init__.py
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	140
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	141	2. We know that ``sys.path`` has the paths in which Python checks for
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	142	a module, when it is imported. Suppose you have a package ``utils``
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	143	in some location on your disk, which is not on the python path, how
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	144	will you import it?
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	145
78d20cd87c7e Added questions to writing python scripts. Puneeth Chaganti <punchagan@fossee.in> parents: 335 diff changeset	146	Answer: Append that path to the ``sys.path`` variable.

author	Puneeth Chaganti <punchagan@fossee.in>
	Thu, 11 Nov 2010 10:37:26 +0530
changeset 465	78d20cd87c7e
parent 335	d5248a15274c
permissions	-rw-r--r--