Pythonic way to apply format to all strings in dictionary without f-strings

Question

I have a dictionary that looks like this:

d = {
  'hello': 'world{x}',
  'foo': 'bar{x}'
}

What's the pythonic way of running format on all values in the dictionary? For example with x = 'TEST' the end result should be:

{
  'hello': 'worldTEST',
  'foo': 'barTEST'
}

NB: I'm loading d from another module so can not use f-strings.

Answer 1

If you're using Python-3.6+ the pythonic way is using f-strings, otherwise a dictionary comprehension:

In [147]: x = 'TEST'

In [148]: d = {
     ...:   'hello': f'world{x}',
     ...:   'foo': f'bar{x}'
     ...: }

In [149]: d
Out[149]: {'foo': 'barTEST', 'hello': 'worldTEST'}

In python < 3.6:

d = {
     'hello': f'world{var}',
     'foo': f'bar{var}'
    }

{k: val.format(var=x) for k, val in d.items()}