Python Coding

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ubuntu2004

Kernel: Python 3 (system-wide)

Exercise 15.1

Create a dictionary called mushrooms containing the data in the following table. Print it.

Scientific Name	Common Name
Fistulina hepatica	Beefsteak
Laetiporus sulphureus	Chicken-of-the-Woods
Flammulina velutipes	Enoki
Hericium erinaceus	Lion’s Mane

In [4]:

mushrooms = {'Fistulina hepatica':"Beefsteak", 'Laetiporus sulphureus':"Chicken-of-the-Woods", 'Flammulina velutipes': "Enoki", 'Hericium erinaceus':"Lion's Mane"}

mushrooms

Out[4]:

{'Fistulina hepatica': 'Beefsteak',
 'Laetiporus sulphureus': 'Chicken-of-the-Woods',
 'Flammulina velutipes': 'Enoki',
 'Hericium erinaceus': "Lion's Mane"}

Exercise 15.2

Add the following items to mushrooms:
Pleurotus pulmonarius: Summer oyster
Pleurotus euosmos: Tarragon

In [7]:

mushrooms['Pleurotus pulmonarius'] = 'Summer oyster'
mushrooms['Pleurotus euosmos'] = 'Tarragon'

mushrooms

Out[7]:

{'Fistulina hepatica': 'Beefsteak',
 'Laetiporus sulphureus': 'Chicken-of-the-Woods',
 'Flammulina velutipes': 'Enoki',
 'Hericium erinaceus': "Lion's Mane",
 'Pleurotus pulmonarius': 'Summer oyster',
 'Pleurotus euosmos': 'Tarragon'}

Exercise 15.3

Print the common name for Laetiporus sulphureus.

In [8]:

mushrooms['Laetiporus sulphureus']

Out[8]:

'Chicken-of-the-Woods'

Exercise 15.4

Replace the common name for Laetiporus sulphureus with Sulphur Shelf (this is another common name for this species which forms striking golden-yellow shelf-like fungal structures on tree trunks and branches.)

In [9]:

mushrooms['Laetiporus sulphureus'] = 'Sulphur Shelf'

mushrooms

Out[9]:

{'Fistulina hepatica': 'Beefsteak',
 'Laetiporus sulphureus': 'Sulphur Shelf',
 'Flammulina velutipes': 'Enoki',
 'Hericium erinaceus': "Lion's Mane",
 'Pleurotus pulmonarius': 'Summer oyster',
 'Pleurotus euosmos': 'Tarragon'}

Exercise 15.5

Test if the species Pholiota nameko is in mushrooms.

In [10]:

if 'Pholiota nameko' in mushrooms:
    print('yes')
else:
    print('no')

Out[10]:

no

Exercise 15.6

Create an empty dictionary called books.

In [11]:

books = {}

Exercise 15.7

Add the following two books to your dictionary books:

Book title	Authour
The chimpanzees of Gombe	Jane Goodall
The blind watchmaker	Richard Dawkins

In [14]:

books['The chimpanzees of Gombe'] = 'Jane Goodall'
books['The blind watchmaker'] = 'Richard Dawkins'

Out[14]:

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-14-79fa85f20bef> in <module>
      2 books['The blind watchmaker'] = 'Richard Dawkins'
      3 
----> 4 print(books[1])

KeyError: 1