How to Run a Cell in Jupyter Notebook Only If a Value Is Null?

Hey! I had the same issue a while back. What worked for me was using `try` and `except` blocks to handle null values. Like this:

```python
try:
if some_value is None:
print("Value is null, doing stuff now!")
except NameError:
pass
```

This way, if `some_value` isn’t defined, it just skips the cell without errors. Not sure if it’s the cleanest, but it gets the job done!

Also, check out [nbconvert](https://nbconvert.readthedocs.io/)—it’s a tool that might help automate stuff like this in Jupyter notebooks.