René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"%magic% doesn't work in Emacs 25.1-2 ipython (run-python) buffer on Windows 7.","articleBody":"Programmer -  normally I use ipython in emacs, in particular Ubuntu, but that machine is down for the count at the moment and so I'm, reluctantly, using windows and reconstructing the environment I like.  Since there's a part not working thought I might have a try at the code.\r\n\r\nIPython 5.1.0, Emacs 25.1-2 on Windows 7.\r\n\r\nI run %magic% and get this trace.  (same operation in ipython in a cmd window works fine)\r\n\r\n```\r\n(Pdb) c\r\n\r\nBdbQuitTraceback (most recent call last)\r\n\u003cipython-input-6-d4375e0cd73a\u003e in \u003cmodule\u003e()\r\n----\u003e 1 get_ipython().magic(u'magic %')\r\n\r\nc:\\python27\\lib\\site-packages\\IPython\\core\\interactiveshell.pyc in magic(self, arg_s)\r\n   2156         magic_name, _, magic_arg_s = arg_s.partition(' ')\r\n   2157         magic_name = magic_name.lstrip(prefilter.ESC_MAGIC)\r\n-\u003e 2158         return self.run_line_magic(magic_name, magic_arg_s)\r\n   2159 \r\n   2160     #-------------------------------------------------------------------------\r\n\r\nc:\\python27\\lib\\site-packages\\IPython\\core\\interactiveshell.pyc in run_line_magic(self, magic_name, line)\r\n   2077                 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals\r\n   2078             with self.builtin_trap:\r\n-\u003e 2079                 result = fn(*args,**kwargs)\r\n   2080             return result\r\n   2081 \r\n\r\n\u003cdecorator-gen-32\u003e in magic(self, parameter_s)\r\n\r\nc:\\python27\\lib\\site-packages\\IPython\\core\\magic.pyc in \u003clambda\u003e(f, *a, **k)\r\n    186     # but it's overkill for just that one bit of state.\r\n    187     def magic_deco(arg):\r\n--\u003e 188         call = lambda f, *a, **k: f(*a, **k)\r\n    189 \r\n    190         if callable(arg):\r\n\r\nc:\\python27\\lib\\site-packages\\IPython\\core\\magics\\basic.pyc in magic(self, parameter_s)\r\n    257        str(self.lsmagic()),\r\n    258        ]\r\n--\u003e 259         page.page('\\n'.join(out))\r\n    260 \r\n    261 \r\n\r\nc:\\python27\\lib\\site-packages\\IPython\\core\\page.py in page(data, start, screen_lines, pager_cmd)\r\n    273 \r\n    274     # fallback on default pager\r\n--\u003e 275     return pager_page(data, start, screen_lines, pager_cmd)\r\n    276 \r\n    277 \r\n\r\nc:\\python27\\lib\\site-packages\\IPython\\core\\page.py in pager_page(strng, start, screen_lines, pager_cmd)\r\n    186     numlines = max(num_newlines,int(len_str/80)+1)\r\n    187     pdb.set_trace()\r\n--\u003e 188     screen_lines_def = get_terminal_size()[1]\r\n    189 \r\n    190     # auto-determine screen size\r\n\r\nc:\\python27\\lib\\site-packages\\IPython\\core\\page.py in pager_page(strng, start, screen_lines, pager_cmd)\r\n    186     numlines = max(num_newlines,int(len_str/80)+1)\r\n    187     pdb.set_trace()\r\n--\u003e 188     screen_lines_def = get_terminal_size()[1]\r\n    189 \r\n    190     # auto-determine screen size\r\n\r\nc:\\python27\\lib\\bdb.pyc in trace_dispatch(self, frame, event, arg)\r\n     47             return # None\r\n     48         if event == 'line':\r\n---\u003e 49             return self.dispatch_line(frame)\r\n     50         if event == 'call':\r\n     51             return self.dispatch_call(frame, arg)\r\n\r\nc:\\python27\\lib\\bdb.pyc in dispatch_line(self, frame)\r\n     65     def dispatch_line(self, frame):\r\n     66         if self.stop_here(frame) or self.break_here(frame):\r\n---\u003e 67             self.user_line(frame)\r\n     68             if self.quitting: raise BdbQuit\r\n     69         return self.trace_dispatch\r\n\r\nBdbQuit: \r\n```\r\n\r\nIt's crashing basically because get_terminal_size isn't working - here:\r\n\r\n```\r\n    def _get_terminal_size(fd):\r\n        pdb.set_trace()\r\n        columns = lines = 0\r\n\r\n        try:\r\n            handle = _handles[fd]\r\n            csbi = create_string_buffer(22)\r\n            res = windll.kernel32.GetConsoleScreenBufferInfo(handle, csbi)\r\n            if res:\r\n                res = struct.unpack(\"hhhhHhhhhhh\", csbi.raw)\r\n                left, top, right, bottom = res[5:9]\r\n                columns = right - left + 1\r\n                lines = bottom - top + 1\r\n        except Exception:\r\n            pass\r\n```\r\n\r\nwindll.kernel32.GetConsoleScreenBufferInfo(handle, csbi) fails and returns 0.  I can, later on, in pdb plug in a reasonable value for LINES and it works.\r\n\r\nWhat's needed to have a crack at this?","author":{"url":"https://github.com/patfla","@type":"Person","name":"patfla"},"datePublished":"2017-01-28T00:56:38.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/10211/ipython/issues/10211"}