Hi @tracychenxy this seems like a duplicate of #17452 In the linked issue some instructions regarding the qtconsole version installed, could help you to prevent the problem. Otherwise, I would suggest ...

Introduction: Small pelagic fishes constitute large proportions of fisheries and are important components linking lower and higher trophic levels in marine ecosystems. Many small pelagic fishes in the ...

Fix a freeze when binary strings can't be converted to unicode in Python 2 Fix a freeze with Numpy arrays containing strings ...