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Adjust fix_display() to work when tkinter is not installed #225

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Adjust fix_display() to work when tkinter is not installed #225

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20 changes: 12 additions & 8 deletions sciunit/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -193,16 +193,20 @@ def fix_display(self) -> None:
backend must be changed to one that doesn't need a display.
"""

try:
tkinter.Tk()
except (tkinter.TclError, NameError): # If there is no display.
if tkinter is not None: # tkinter is at least installed
try:
import matplotlib as mpl
except ImportError:
pass
tkinter.Tk()
except (tkinter.TclError, NameError):
pass # It appears that there there is no display.
else:
sciunit.logger.info("Setting matplotlib backend to Agg")
mpl.use("Agg")
return # We can use the tkinter backend.
try:
import matplotlib as mpl
except ImportError:
pass
else:
sciunit.logger.info("Setting matplotlib backend to Agg")
mpl.use("Agg")

def load_notebook(
self, name: str
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