How to get a value from a tuple when the tuple is a value of a dictionary?

Question

Hi guys, I'm back again since I've got another None output. I'm trying to write a code that returns the password corresponding to a site. Here's my piece of code:

data = {'facebook': ('facebook email', 'facebook password'),
'instagram': ('instagram email', 'instagram password'),
'yahoo mail': ('yahoo email', 'yahoo password')}

site = input()
for key in data:
if site == key:
psw = data.get(key[1]) # get the password, that stands at index 1 of the tuple
print(psw)

# output
None

Why is the output None? How can I print the second value of the tuple properly?

P.S.: I cannot upload the file of the code, I'm sorry for that but the app doesn't work so you are supposed to copy and paste on your editor.

Answer 1

psw = data.get(key)[1]

# or without loop:

psw = data.get(site,(None,None))[1]

Answer 2

# with dictionary items

data = {'facebook': ('facebook email', 'facebook password'),
'instagram': ('instagram email', 'instagram password'),
'yahoo mail': ('yahoo email', 'yahoo password')}

site = input().strip()
psw = ''
for key, val in data.items():
if site == key:
psw = val[1]

print(psw)

Answer 3

Okay, it is clearer now. Thank you all!

Answer 4

Ohhh right! I forgot the parentheses order! That makes much more sense now hahahaha
By the way, I don't get the None thing and how to treat it. It didn't lead me to an error, technically, but what does None mean in this context?

Answer 5

get takes as second argument a default value to return if key is not found... so if key do not exists, a tuple is returned in wich there can be retrieved None at index 1

None is null / undefined special value in Python

Answer 6

your loop code will throw an error if key not exist, as you will try to print a variable wich has not been assigned previously ;)