A Smarter Way to Learn Python - Chapter 32 Exercises

Code the first line to loop through the values in a dictionary. Make up the dictionary name and the name of the variable that stores each value.

for x in y.values():

^ *for [a-zA-Z_][a-zA-Z0-9_]* in [a-zA-Z_][a-zA-Z0-9_]*\.values: *$

Code the first line to loop through the keys of a dictionary. Make up the dictionary name and the name of the variable that stores keys.

for x in y.keys():

^ *for [a-zA-Z_][a-zA-Z0-9_]* in [a-zA-Z_][a-zA-Z0-9_]*\.keys: *$

Code the first line to loop through the keys of the customers dictionary. The name of the variable that holds the keys is k.

for k in customers.keys():

for `k `in `customers`.`keys`(`)`:

Code the first line to loop through the elements in a list named numbers. The variable that holds the elements is num.

for num in numbers:

Loop through the keys of a dictionary. Display each key. Make everything up.

for x in y.keys():
print(x)

^ *for ([a-zA-Z_][a-zA-Z0-9_]*) in [a-zA-Z_][a-zA-Z0-9_]*\.keys:\n print$\1$ *$

In a single line, display the value paired with a key in a dictionary. The key is a string. Make up the name of the dictionary and the key.

print(capitals["Argentina"])

^ *print$[a-zA-Z_][a-zA-Z0-9_]*\[•.+•\]$ *$

Loop through the keys in a dictionary and display the value for each key. Make everything up.

for a_key in products.keys():
print(a_key)

^ *for ([a-zA-Z_][a-zA-Z0-9_]*) in ([a-zA-Z_][a-zA-Z0-9_]*)\.keys:\n print$\1$ *$

Loop through a dictionary's keys. Append the value of each key to a list. Make everything up.

for a_key in cities.keys():
metro_list.append(a_key)

^ *for ([a-zA-Z_][a-zA-Z0-9_]*) in ([a-zA-Z_][a-zA-Z0-9_]*)\.keys:\n [a-zA-Z_][a-zA-Z0-9_]*\.append$\1$ *$

Loop through a dictionary's keys. If a key's value is greater than or equal to 99, display "ok" and break the loop.

for x in y.keys():
  if x >= 99:
    print("ok")
    break

^ *for ([a-zA-Z_][a-zA-Z0-9_]*) in ([a-zA-Z_][a-zA-Z0-9_]*)\.keys:\n if \1\ >= 99:\n print$•ok•$\n break *$

Loop through a dictionary's keys. Add each item—both its key and value—to a second dictionary. Make everything up.

for x in y.keys():
a[x] = y[x]

^ *for ([a-zA-Z_][a-zA-Z0-9_]*) in ([a-zA-Z_][a-zA-Z0-9_]*)\.keys:\n [a-zA-Z_][a-zA-Z0-9_]*\[\1\] = \2\[\1\] *$

Loop through the dictionary's keys, displaying each of the dictionary's values. Store the keys in the variable a_key.
Click the Run button above your code. If you've coded correctly, the three number values will display in the right-hand panel. (You can click Instructions at the top of the right-hand panel to see the correct code.)

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Loop through the hardness_scale dictionary, adding each key-value pair in it to the minerals dictionary. Display the minerals dictionary.
Click the Run button above your code. If you've coded correctly, the minerals dictionary will display in the right-hand panel. (You can click Instructions at the top of the right-hand panel to see the correct code.)

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A Smarter Way to Learn Python / Chapter 32 Exercises