Building complex strings with f-strings

Creating complex strings is, in many ways, the polar opposite of parsing a complex string. We generally find that we use a template with substitution rules to put data into a more complex format.

Getting ready

Let's say we have pieces of data that we need to turn into a nicely formatted message. We might have data that includes the following:

>>> id = "IAD"
>>> location = "Dulles Intl Airport"
>>> max_temp = 32
>>> min_temp = 13
>>> precipitation = 0.4

And we'd like a line that looks like this:

IAD : Dulles Intl Airport : 32 / 13 / 0.40

How to do it...

1. Create an f-string from the result, replacing all of the data items with {} placeholders. Inside each placeholder, put a variable name (or an expression.) Note that the string uses the prefix of f'. The f prefix creates a sophisticated string object where values are interpolated...