Description
Reading
Chapter 5
Programming Problems
doubleVowel
Write a function doubleVowel that accepts a word as an argument and returns True if the word
contains two adjacent vowels and False otherwise. Sample usage:
numPairs
Write a function numPairs that accepts two arguments, a target number and a list of numbers.
The function then returns the count of pairs of numbers from the list that sum to the target
number. In the first example the answer is 2 because the pairs (0,3) and (1,2) both sum to 3. The
pair can be two of the same number, e.g. (2,2) but only if the two 2’s are separate twos in the list.
In the last example below, there are three 2’s, so there are three different pairs (2,2) so there are
5 pairs total that sum to 4.
Sample usage:
>>> doubleVowel(‘apple’)
False
>>> doubleVowel(‘pear’)
True
>>> doubleVowel(‘peAr’)
True
>>> doubleVowel(‘DURIAN’)
True
>>> doubleVowel(‘baNaNa’)
False
>>> doubleVowel(‘baNaNa’)==False
True
hideShow
Write a function hideShow that accepts two string arguments, an input string and a masking
string. The masking string is a string consisting of ‘0’s and ‘1’s that has the same length as the
input string. The function then returns a new string that is the same as the input string, except
that it is masked. That is, in any position where the masking string contains a ‘0’ the input
character is replaced by a ‘#’, whereas if the masking string contains a ‘1’, the character is
unchanged.
Sample usage:
clean
Write a function clean that when is given a string and returns the string with the leading and
trailing space characters removed. Details:
you must use while loop(s)
you must not use the strip method
the space characters are the space ‘ ‘ , newline ‘\n’ , and tab ‘\t’
>>> numPairs( 3, [0,1,2,3] )
2
>>> numPairs( 4, [0,1,2,3] )
1
>>> numPairs( 6, [0,1,2,3] )
0
>>> numPairs( 4, [0,1,2,3,4,2] )
3
>>> numPairs( 4, [0,1,2,3,4,2,2] )
5
>>> numPairs( 4, [0,1,2,3,4,2,2] )==5
True
>>> hideShow(‘apple’,’11001′)
‘ap##e’
>>> hideShow(‘apple’,’00000′)
‘#####’
>>> hideShow(‘apple’,’11111′)
‘apple’
>>> hideShow(‘abcdefghijklmnopqrstuvwxyz’,13*’01’)
‘#b#d#f#h#j#l#n#p#r#t#v#x#z’
>>> hideShow( ‘df###re##’, ‘101010101’ )
‘d#####e##’
>>> hideShow( ‘df###re##’, ‘101010101’ )==’d#####e##’
True
>>> clean(” hello “)
‘hello’
>>> clean(” hello, how are you? “)
‘hello, how are you?’
>>> clean(“\n\n\t what’s up,\n\n doc? \n \t”)
“what’s up,\n\n doc?”
>>> clean(“\n\n\t what’s up,\n\n doc? \n \t”)==”what’s up,\n\n doc?”
True
sequence
Write a function sequence that accepts an number ( int ) and that prints a sequence of numbers
that starts at the given number and obeys the following rules:
the number 1 is the last number in the sequence (e.g stop )
if the number if even, the next number is half of it
if the number is odd, the next number is one more
Specifications:
use a while loop
print each number in the sequence one per line
>>> sequence(3)
3
4
2
1
>>> sequence(4)
4
2
1
>>> sequence(17)
17
18
9
10
5
6
3
4
2
1
