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Functions As Values

In Python, functions are just values, like strings, integers, or objects. For example, we can assign an existing function to a variable:

from collections.abc import Callable


def add(x: int, y: int) -> int:
    return x + y


# assign the function to a new variable
# called `addition`. It behaves the same
# as the original `add` function
addition: Callable[[int, int], int] = add
print(addition(2, 5))
# 7

Callable is the type hint for a function. Callable[[int, int], int] means a function that takes two ints as arguments and returns an int.

Assignment

With the popularity of generative AI (like ChatGPT), we need to be able to convert files into pure text to be injected into prompts.

Complete the file_to_prompt function. It should take a file dictionary and a to_string function as inputs and return a formatted string. to_string converts a dictionary into a string.

Pass the file dictionary to the to_string function to convert file to a string and assign it to a new variable.
Wrap the result of the to_string function in triple backticks (```) to format it as a code block in Markdown. For example:
```
an example string
```
should become:
```
```
an example string
```
```
Including the newlines!

Tip

Notice the two newlines in the example above! You don't need a trailing newline, but you do need one after the first set of backticks, and another before the second set of backticks. You can achieve this by using the newline \n escape character. Here's an example:

print("I wish the ring had never come to me.\nI wish none of this had happened.")

becomes:

I wish the ring had never come to me.
I wish none of this had happened.