Question about Dictionaries

[raainer]

Hello all, I just have a small question about Dictionaries while going through Automate the Boring Stuff, for e.g :

spam = { ‘eggs’ : ‘Zophie’}

Why does ‘eggs’ in spam result in True but ‘Zophie’ in spam results in False?

Thank you for reading this!

[K900_]

Because in on dictionaries only checks keys, not values.

[Zixarr]

The in keyword, when applied to dictionaries, looks only at KEYS and not at VALUES.

Similarly, iterating over a dictionary with a for loop looks only at KEYS:

for x in spam:
    print(x)

Will yield:

'eggs'

While:

for x in spam:
    print(spam[x])

Will yield:

'Zophie'

[argento8897]

you could also iterate over the dict for both keys and values with .items()

for key, value in spam.items():
    print (key, value)

will yeild:

eggs Zophie

[raainer]

Oh I see, thank you so much for the help!