Write Files

Up until now, our program has been read-only... now it's getting really ~~dangerous~~ fun! We'll give our agent the ability to write and overwrite files, within strict limits.

Assignment

Create a new function in your functions directory. Here's the signature I used:
```
def write_file(working_directory, file_path, content):
```

If the file_path is outside the working_directory, return a string with an error:

f'Error: Cannot write to "{file_path}" as it is outside the permitted working directory'

If the file_path doesn't exist, create it. As always, if there are errors, return a string representing the error, prefixed with Error:.
Overwrite the contents of the file with the content argument.

If successful, return a string with the message:

f'Successfully wrote to "{file_path}" ({len(content)} characters written)'

It's important to return a success string so that our LLM knows that the action it took actually worked. Feedback loops, feedback loops, feedback loops!

Create a new test module at the root of your project, test_write_file.py. It should be similar in structure to the test modules that you've written for other functions. Include the following three test cases; as always, print the results of each:
- write_file("calculator", "lorem.txt", "wait, this isn't lorem ipsum")
- write_file("calculator", "pkg/morelorem.txt", "lorem ipsum dolor sit amet")
- write_file("calculator", "/tmp/temp.txt", "this should not be allowed")

Run and submit the CLI tests.

Tips

os.path.exists: Check if a path exists
os.makedirs: Create a directory, along with any necessary parent directories
os.path.dirname: Return the directory name

Example of writing to a file:

with open(file_path, "w") as f:
    f.write(content)