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A comment on New IPython release drops Python 2.7 support. Parent comment

Re:New IPython release drops Python 2.7 support by ofek on Thursday April 20, 2017 @06:36PM (#14161514)
If np.concatenate accepts any iterable, removing the brackets is what you want to do there.
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Re:New IPython release drops Python 2.7 support by jzwinck on Thursday April 20, 2017 @09:36PM (#14162455)
That won't help. Concatenate needs to know the total length up front. It will evaluate all the input items at once.
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