Python’s new template strings, or t-strings ... urllib.parse.quote if inside_tag else html.escape out_item = escape(str(item.value)) else: for l in item: if l in (""): inside_tag = not inside ...

You can think about it as a box that stores a value ... will run into a lot. A string is a list of characters in order.

so the key float-value above could not be mapped directly to a variable with that name. However, it could be mapped to a key in a dictionary, since Python dictionary keys can be any string.