ModuleNotFoundError: No module named 'psutil'

[emilykl]

Encountered this error today when calling fig.show() in a fresh Python environment:

ModuleNotFoundError: No module named 'psutil'

Stack trace:

(local) (plotly.py) (base) ekl@Emilys-MacBook-Air-2 plotly.py % python test-histogram.py
Traceback (most recent call last):
  File "/Users/ekl/code/plotly.py/test-histogram.py", line 17, in <module>
    fig.show()
  File "/Users/ekl/code/plotly.py/packages/python/plotly/plotly/basedatatypes.py", line 3414, in show
    return pio.show(self, *args, **kwargs)
           ^^^^^^^^
  File "/Users/ekl/code/plotly.py/packages/python/plotly/_plotly_utils/importers.py", line 36, in __getattr__
    class_module = importlib.import_module(rel_module, parent_name)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.12.5/Frameworks/Python.framework/Versions/3.12/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 995, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/Users/ekl/code/plotly.py/packages/python/plotly/plotly/io/_renderers.py", line 38, in <module>
    import psutil
ModuleNotFoundError: No module named 'psutil'

---

This is caused by the addition of import psutil at the top of plotly/io/_renderers.py in #4823.

I think all that needs to change is to move import psutil inside display_jupyter_version_warnings() under the two Jupyter elif cases (so that it doesn't get encountered when calling the normal fig.show() from a regular Python script).