René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"examples/misc/longshort.py is outdated","articleBody":"As of master / numpy 1.11:\n\n```\n$ python2 examples/misc/longshort.py\nTraceback (most recent call last):\n  File \"examples/misc/longshort.py\", line 24, in \u003cmodule\u003e\n    r1 = mlab.rec_append_fields(r1, 'gains', gains1)\n  File \"/home/antony/src/extern/matplotlib/lib/matplotlib/mlab.py\", line 2389, in rec_append_fields\n    newdtype = np.dtype(rec.dtype.descr + list(zip(names, dtypes)))\nTypeError: data type not understood\n\n$ python3 examples/misc/longshort.py\nTraceback (most recent call last):\n  File \"examples/misc/longshort.py\", line 12, in \u003cmodule\u003e\n    u1 = urllib.urlretrieve('http://ichart.finance.yahoo.com/table.csv?s=AAPL\u0026d=9\u0026e=14\u0026f=2008\u0026g=d\u0026a=8\u0026b=7\u0026c=1984\u0026ignore=.csv')\nAttributeError: module 'urllib' has no attribute 'urlretrieve'\n```\n\nBasically `mlab.rec_append_fields` has some unicode/bytes issues on Py2 and the imports need to be renamed on Py3 (I guess).\n","author":{"url":"https://github.com/anntzer","@type":"Person","name":"anntzer"},"datePublished":"2016-07-31T08:55:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/6866/matplotlib/issues/6866"}