Learn Algorithm Design by Building a Shortest Path Algorithm - Step 9

Python
1

Tell us what’s happening:

Not sure what I’m missing, I’ve also tried

print(copper[‘age’], copper[‘food’], copper[‘species’]

Your code so far


# User Editable Region

copper = {
    'species': 'guinea pig',
    'age': 2
}
copper['food'] = 'hay'
copper['species'] = 'Cavia porcellus'

for coppper in copper: 
    print(copper['age'], copper['species'])

# User Editable Region

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Challenge Information:

Learn Algorithm Design by Building a Shortest Path Algorithm - Step 9

2

updating to add the instructions:

Step 9

To iterate over the keys of a dictionary, you can simply put the dictionary into a for loop. The code below would print each key in the dictionary dict:

Example Code

for i in dict:
   print(i)

Replace the print() call with a for loop that iterates over copper and prints each key.

3 
for i in dict:
   print(i)

See how this works, the loop iterates over the items in dict. Each item is stored in the i variable, so that’s what you print in the loop.

See how i i the loop matches the i in the print

for i in dict: # i variable created
   print(i)    # i variable used

prints each key

You have a key and a value in a dict {‘key’: ‘value’}

You want to print the key.

4

thank you!!! seeing {‘key’:‘value’} as you displayed was very helpful

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