Copy/paste this code or download the bundle.
#!/usr/bin/python -tt
# Copyright 2013 Jonathan B. Miller
# 'A Gentle Guide to Python', by Jonathan B. Miller, for LASTS 2013
# https://bitbucket.org/JMill/lasts2013py
# Basic string and integer exercises
# Fill in the code for the functions below.
# The starter code for each function includes a 'return'
# which is merely a placeholder for your code.
# It's okay if you do not complete every part of this exercise.
# When you run this script, 'OK' will be printed when each function
# is correct.
# A. add2plus2
# This is a 'function'. When someone writes add2plus2(), we want it to 'return' a 4.
# Just add a tiny bit of code after the 'return' statement below.
def add2plus2():
return # +++ your code here +++
# B. weArePSU
# If someone calls weArePSU(), we want it to return "PSU".
def weArePSU():
return # +++ your code here +++
# C. lasts
# Return a sentence that says "This is LASTS 2013"
def lasts():
return # +++ your code here +++
# D. aBigWhat
# Penn State is a Big ____ school. Calculate and return the
# number as the product (multiplication) of at least 2
# other numbers.
def aBigWhat():
return # +++ your code here +++
# E. givingBack
# This function receives an input that we'll call 'whatever'.
# Write the function to 'return' what was given to it.
def givingBack(whatever):
return # +++ your code here +++
# F. givingBackMore
# Similar 'givingBack()' above, givingBackMore receives input called
# 'word'. Make the function return two 'word's (whatever the word is).
# (Hint: you can multiply words by two by writing'* 2'.)
def givingBackMore(word):
return # +++ your code here +++
############ Do not edit below this line. ##################
# The test() function is used in main() to print
# what each function returns versus what it's supposed to return.
def test(got, expected):
if got == expected:
prefix = ' OK '
else:
prefix = ' X '
print '%s got: %s expected: %s' % (prefix, repr(got), repr(expected))
# Calls above functions with a mix of inputs.
def main():
print 'add2plus2'
test(add2plus2(), 4)
print
print 'weArePSU'
test(weArePSU(), "PSU")
print
print 'lasts'
test(lasts(), "This is LASTS 2013")
print
print 'aBigWhat'
test(aBigWhat(), 10)
print
print 'givingBack'
test(givingBack('lion'), 'lion')
test(givingBack('lady lion'), 'lady lion')
print
print 'givingBackMore'
test(givingBackMore('cha'), 'chacha')
test(givingBackMore('repeat'), 'repeatrepeat')
if __name__ == '__main__':
main()
When you first run it, you'll see this:
add2plus2
X got: None expected: 4
weArePSU
X got: None expected: 'PSU'
lasts
X got: None expected: 'This is LASTS 2013'
aBigWhat
X got: None expected: 10
givingBack
X got: None expected: 'lion'
X got: None expected: 'lady lion'
givingBackMore
X got: None expected: 'chacha'
X got: None expected: 'repeatrepeat'
I added some tests for you to pass. Sample solutions are below. Please don't look at the solutions until you're definitely stumped, or else you won't learn anything.
Solutions: (don't peek!)
#!/usr/bin/python -tt
# Copyright 2013 Jonathan B. Miller
# 'A Gentle Guide to Python', by Jonathan B. Miller, for LASTS 2013
# https://bitbucket.org/JMill/lasts2013py
# Basic string and integer exercises
# Fill in the code for the functions below.
# The starter code for each function includes a 'return'
# which is merely a placeholder for your code.
# It's okay if you do not complete every part of this exercise.
# When you run this script, 'OK' will be printed when each function
# is correct.
# A. add2plus2
# This is a 'function'. When someone writes add2plus2(), we want it to 'return' a 4.
# Just add a tiny bit of code after the 'return' statement below.
def add2plus2():
return 2+2
# B. weArePSU
# If someone calls weArePSU(), we want it to return "PSU".
def weArePSU():
return "PSU"
# C. lasts
# Return a sentence that says "This is LASTS 2013"
def lasts():
return "This is LASTS 2013"
# D. aBigWhat
# Penn State is a Big ____ school. Calculate and return the
# number as the product (multiplication) of at least 2
# other numbers.
def aBigWhat():
return 2 * 5
# E. givingBack
# This function receives an input that we'll call 'whatever'.
# Write the function to 'return' what was given to it.
def givingBack(whatever):
return whatever
# F. givingBackMore
# Similar 'givingBack()' above, givingBackMore receives input called
# 'word'. Make the function return two 'word's (whatever the word is).
# (Hint: you can multiply words by two by writing'* 2'.)
def givingBackMore(word):
return word * 2
############ Do not edit below this line. ##################
# The test() function is used in main() to print
# what each function returns versus what it's supposed to return.
def test(got, expected):
if got == expected:
prefix = ' OK '
else:
prefix = ' X '
print '%s got: %s expected: %s' % (prefix, repr(got), repr(expected))
# Calls above functions with a mix of inputs.
def main():
print 'add2plus2'
test(add2plus2(), 4)
print
print 'weArePSU'
test(weArePSU(), "PSU")
print
print 'lasts'
test(lasts(), "This is LASTS 2013")
print
print 'aBigWhat'
test(aBigWhat(), 10)
print
print 'givingBack'
test(givingBack('lion'), 'lion')
test(givingBack('lady lion'), 'lady lion')
print
print 'givingBackMore'
test(givingBackMore('cha'), 'chacha')
test(givingBackMore('repeat'), 'repeatrepeat')
if __name__ == '__main__':
main()
All the tests pass:
add2plus2
OK got: 4 expected: 4
weArePSU
OK got: 'PSU' expected: 'PSU'
lasts
OK got: 'This is LASTS 2013' expected: 'This is LASTS 2013'
aBigWhat
OK got: 10 expected: 10
givingBack
OK got: 'lion' expected: 'lion'
OK got: 'lady lion' expected: 'lady lion'
givingBackMore
OK got: 'chacha' expected: 'chacha'
OK got: 'repeatrepeat' expected: 'repeatrepeat'
