Print empty string if variable is None [duplicate]

Question

I'm trying to make a templated string that will print values of a given dict. However, the key may or may not exist in the dict. If it doesn't exist, I'd like it to return an empty string instead.

To demonstrate what I mean, let's say I have a dict:

test_dict = { 1: "a", 2: "b"}

And a template string:

'{} {} {}'.format(test_dict.get(1), test_dict.get(2), test_dict.get(3))

I'd like the following output:

'a b '

But instead I get:

'a b None'

Answer 1

Use the dictionary's get function. This allows you to specify a value to return if the key is not found

'{}, {}, {}'.format(test_dict.get(1,''), test_dict.get(2,''), test_dict.get(3, ''))