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If IPython is merely installed, don't assume that it's actually used #5222

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5 changes: 3 additions & 2 deletions plotly/io/_renderers.py
Original file line number Diff line number Diff line change
Expand Up @@ -542,10 +542,11 @@ def show(fig, renderer=None, validate=True, **kwargs):
# orca not found
pass

# Check if we're running in ipython terminal
# Check if we're running in ipython terminal. Or, if we aren't
# running ipython at all.
ipython_info = ipython.get_ipython()
shell = ipython_info.__class__.__name__
if not default_renderer and (shell == "TerminalInteractiveShell"):
if not default_renderer and (shell in ("TerminalInteractiveShell", "NoneType")):
default_renderer = "browser"

# Check if we're running in a Jupyter notebook or JupyterLab
Expand Down