Homework: Data Structures, control flow, logic¶

Data Structures¶

Problem 1:¶

In [ ]:
test_string = "This is my test STRING."

final_string = test_string[::3].lower()

print(final_string)

tssye rg

Problem 2:¶

In [ ]:
species_dict = {
    'Rattus': 'norvegicus',
    'Taeniopygia': 'guttata',
    'Taeniopygia': 'castanotis',
    'Drosophila': 'melanogaster',
    'Macaca': 'mulatta',
    'Macaca': 'nemestrina',
}

print(species_dict)

{'Rattus': 'norvegicus', 'Taeniopygia': 'castanotis', 'Drosophila': 'melanogaster', 'Macaca': 'nemestrina'}

Problem 3:¶

In [ ]:
this_tuple = (
    ['foo', 1, 0, 'bar', 2.78, True],
    {'a': 1, 'b': 2, 'c': 3},
    'a simple string'
)

list(zip(*this_tuple))
Out[ ]:
[('foo', 'a', 'a'), (1, 'b', ' '), (0, 'c', 's')]

Control flow, iteration, logic¶

In [ ]:
initial_string = "it was the best of times, it was the worst of times"

replacement_dict = {
    'a': '\u03b1', 
    'e': '\u03b5', 
    'i': '\u03b9', 
    'o': '\u03bf', 
    'u': '\u03c5'
}

output_list = []

for letter in initial_string:
    if letter in replacement_dict:
        output_list.append(replacement_dict[letter])
    else:
        output_list.append(letter)

output_string = ''.join(output_list)

print(output_string) 

ιt wαs thε bεst οf tιmεs, ιt wαs thε wοrst οf tιmεs