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GitHub Repository: pierian-data/complete-python-3-bootcamp
 Path: blob/master/09-Empty-Section-Skip/08-Built-in Functions Assessment Test.ipynb
Views: 648
Kernel: Python 3

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Built-in Functions Test

For this test, you should use built-in functions and be able to write the requested functions in one line.

Problem 1

Use map() to create a function which finds the length of each word in the phrase (broken by spaces) and returns the values in a list.

The function will have an input of a string, and output a list of integers.

def word_lengths(phrase):
    
    pass

word_lengths('How long are the words in this phrase')
[3, 4, 3, 3, 5, 2, 4, 6]

Problem 2

Use reduce() to take a list of digits and return the number that they correspond to. For example, [1, 2, 3] corresponds to one-hundred-twenty-three.
Do not convert the integers to strings! 

from functools import reduce

def digits_to_num(digits):
    
    pass

digits_to_num([3,4,3,2,1])
34321

Problem 3

Use filter to return the words from a list of words which start with a target letter.

def filter_words(word_list, letter):
    
    pass

l = ['hello','are','cat','dog','ham','hi','go','to','heart']
filter_words(l,'h')
['hello', 'ham', 'hi', 'heart']

Problem 4

Use zip() and a list comprehension to return a list of the same length where each value is the two strings from L1 and L2 concatenated together with connector between them. Look at the example output below:

def concatenate(L1, L2, connector):
    
    pass

concatenate(['A','B'],['a','b'],'-')
['A-a', 'B-b']

Problem 5

Use enumerate() and other skills to return a dictionary which has the values of the list as keys and the index as the value. You may assume that a value will only appear once in the given list.

def d_list(L):
    
    pass

d_list(['a','b','c'])
{'a': 0, 'b': 1, 'c': 2}

Problem 6

Use enumerate() and other skills from above to return the count of the number of items in the list whose value equals its index.

def count_match_index(L):
    
    pass

count_match_index([0,2,2,1,5,5,6,10])
4

Great Job!