如何打印字典中的多个项目

Question

I have a VERY basic question here, so please don't laugh. I can't find any specific resolution to this, and the manual I am using does not address this question specifically, probably because it is something really obvious. When using:

print residents['tenantA']

I get the correct output " 36 " from the dictionary

residents = {'tenantA': 36, 'tenantB': 37, 'tenantC': 38}

But when I try this with more than one item from the dictionary as follows:

print residents['tenantB', 'tenantC']

I get the following error:

KeyError: ('tenantB', 'tenantC')

I have also tried

print residents['tenantB' + 'tenantC']

but as expected, this just concatenates tenantB and tenantC to tenantBtenantC .

I have also tried:

print residents[1:]

but then I get the error

TypeError: unhashable type

The error message does not tell me much. Could anyone let me know what I am missing here?

Thanks.

Answer 1

print residents['tenantB', 'tenantC']

This tells python to look for a key called 'tenantB', 'tenantC' , and you don't have that key in your dict.

Probably you wanted this instead:

print residents['tenantB'], residents['tenantC']

Answer 2

Python converts 'tenantB', 'tenantC' as a tuple and looks for tuple as a key for the dict. Which is evident from the error message,

KeyError: ('tenantB', 'tenantC')

You can see that the key is printed as tuple ('tenantB', 'tenantC') .

Hence individual keys must be printed separately, like

print residents['tenantB'], residents['tenantC']

Answer 3

In python3:

print(residents['tenantB'], residents['tenantC'])

Answer 4

Found this page as I was struggling with the same issue for an online course I am doing. I'm a newbie of sorts and not been able to find anything so far in Google that indicates it's possible to pack multiple items in a print statement.

So the resolution I've worked out is as follows (am sure there is a better way, but not found it yet):

A1 = dictionary_name[entry No.]['key-1']
A2 = dictionary_name[entry No.]['key-2']
A3 = dictionary_name[entry No.]['key-3']

print(f"Compare A: {A1}, {A2}, {A3}")  

The variables A1, A2 & A3 are assigned with the values of each key and print as this output:

Compare A: National Geographic, Magazine, United States