Perhaps an easier way to debug this is to use the fact that the global maple object is defined in the Sage library by the assignment maple=Maple() (in sage/interfaces/maple.py) and if at the top of your Sage session you do maple = Maple(logfile="maple.log") then you can take a look in that file to see all the communication between Sage via pexpect and maple.
John On Wed, 6 Mar 2019 at 16:42, E. Madison Bray <[email protected]> wrote: > > > On Wednesday, March 6, 2019 at 5:31:19 PM UTC+1, E. Madison Bray wrote: >> >> On Tuesday, March 5, 2019 at 4:47:39 PM UTC+1, benyamin alizade wrote: >>> >>> It gives no result, and when I interrupt it, the following error appears: >>> >>> >>> --------------------------------------------------------------------------- >>> EOF Traceback (most recent call >>> last) >>> <ipython-input-2-8f0455f97669> in <module>() >>> ----> 1 maple('2*3') >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc >>> in __call__(self, x, name) >>> 278 >>> 279 if isinstance(x, string_types): >>> --> 280 return cls(self, x, name=name) >>> 281 try: >>> 282 return self._coerce_from_special_method(x) >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc >>> in __init__(self, parent, value, is_name, name) >>> 1436 else: >>> 1437 try: >>> -> 1438 self._name = parent._create(value, name=name) >>> 1439 # Convert ValueError and RuntimeError to TypeError >>> for >>> 1440 # coercion to work properly. >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc >>> in _create(self, value, name) >>> 474 def _create(self, value, name=None): >>> 475 name = self._next_var_name() if name is None else name >>> --> 476 self.set(name, value) >>> 477 return name >>> 478 >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/maple.pyc >>> in set(self, var, value) >>> 622 """ >>> 623 cmd = '%s:=%s:' % (var, value) >>> --> 624 out = self.eval(cmd) >>> 625 if out.find("error") != -1: >>> 626 raise TypeError("Error executing code in >>> Maple\nCODE:\n\t%s\nMaple ERROR:\n\t%s" % (cmd, out)) >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc >>> in eval(self, code, strip, synchronize, locals, allow_use_file, >>> split_lines, **kwds) >>> 1350 elif split_lines: >>> 1351 return '\n'.join([self._eval_line(L, >>> allow_use_file=allow_use_file, **kwds) >>> -> 1352 for L in >>> code.split('\n') if L != '']) >>> 1353 else: >>> 1354 return self._eval_line(code, >>> allow_use_file=allow_use_file, **kwds) >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/maple.pyc >>> in _eval_line(self, line, allow_use_file, wait_for_prompt, >>> restart_if_needed) >>> 574 with gc_disabled(): >>> 575 z = Expect._eval_line(self, line, >>> allow_use_file=allow_use_file, >>> --> 576 >>> wait_for_prompt=wait_for_prompt).replace('\\\n','').strip() >>> 577 if z.lower().find("error") != -1: >>> 578 raise RuntimeError("An error occurred running a >>> Maple command:\nINPUT:\n%s\nOUTPUT:\n%s" % (line, z)) >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc >>> in _eval_line(self, line, allow_use_file, wait_for_prompt, >>> restart_if_needed) >>> 982 out = '' >>> 983 except KeyboardInterrupt: >>> --> 984 self._keyboard_interrupt() >>> 985 raise KeyboardInterrupt("Ctrl-c pressed while >>> running %s"%self) >>> 986 if self._terminal_echo: >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/sage/interfaces/maple.pyc >>> in _keyboard_interrupt(self) >>> 333 print("Interrupting %s..." % self) >>> 334 self._expect.sendline(chr(3)) # send ctrl-c >>> --> 335 self._expect.expect(self._prompt) >>> 336 raise RuntimeError("Ctrl-c pressed while running %s" % >>> self) >>> 337 >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/pexpect/spawnbase.pyc >>> in expect(self, pattern, timeout, searchwindowsize, async_, **kw) >>> 339 compiled_pattern_list = >>> self.compile_pattern_list(pattern) >>> 340 return self.expect_list(compiled_pattern_list, >>> --> 341 timeout, searchwindowsize, async_) >>> 342 >>> 343 def expect_list(self, pattern_list, timeout=-1, >>> searchwindowsize=-1, >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/pexpect/spawnbase.pyc >>> in expect_list(self, pattern_list, timeout, searchwindowsize, async_, **kw) >>> 367 return expect_async(exp, timeout) >>> 368 else: >>> --> 369 return exp.expect_loop(timeout) >>> 370 >>> 371 def expect_exact(self, pattern_list, timeout=-1, >>> searchwindowsize=-1, >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/pexpect/expect.pyc >>> in expect_loop(self, timeout) >>> 115 timeout = end_time - time.time() >>> 116 except EOF as e: >>> --> 117 return self.eof(e) >>> 118 except TIMEOUT as e: >>> 119 return self.timeout(e) >>> >>> /opt/sagemath-8.5/local/lib/python2.7/site-packages/pexpect/expect.pyc >>> in eof(self, err) >>> 61 if err is not None: >>> 62 msg = str(err) + '\n' + msg >>> ---> 63 raise EOF(msg) >>> 64 >>> 65 def timeout(self, err=None): >>> >>> EOF: End Of File (EOF). Exception style platform. >>> Maple with PID 5472 running /cygdrive/c/Program Files (x86)/Maple >>> 17/bin.win/maple -t -c interface(screenwidth=infinity,errorcursor=false) >>> command: /cygdrive/c/Program Files (x86)/Maple 17/bin.win/maple >>> args: ['/cygdrive/c/Program Files (x86)/Maple 17/bin.win/maple', '-t', >>> '-c', 'interface(screenwidth=infinity,errorcursor=false)'] >>> buffer (last 100 chars): '' >>> before (last 100 chars): '\r\n' >>> after: <class 'pexpect.exceptions.EOF'> >>> match: None >>> match_index: None >>> exitstatus: None >>> flag_eof: True >>> pid: 5472 >>> child_fd: 10 >>> closed: False >>> timeout: None >>> delimiter: <class 'pexpect.exceptions.EOF'> >>> logfile: None >>> logfile_read: None >>> logfile_send: None >>> maxread: 4194304 >>> ignorecase: False >>> searchwindowsize: None >>> delaybeforesend: None >>> delayafterclose: 0.1 >>> delayafterterminate: 0.1 >>> searcher: searcher_re: >>> 0: re.compile('#-->') >>> >>>> >>>> >> It looks to me like pexpect is just waiting forever for a prompt and not >> receiving one. The best thing to do I think would be to run it more >> directly and see what it's outputting. Perhaps even it's something as >> simple as, the prompt is something other than "#-->". So pexpect will just >> sit there until something resembling the "#-->" appears on its stdin >> stream. >> > > I almost forgot the most important point! If you want to interact "more > directly" what I wrote above, you can use the `ptyprocess` module directly, > which is what pexpect (and by extension Sage's interface to maple) is > using. For example to start process with a PTY from Python/sage: > > sage: import ptyprocess > sage: p = ptyprocess.PtyProcess.spawn(['/cygdrive/c/Program Files > (x86)/Maple 17/bin.win/maple', '-t', '-c', > 'interface(screenwidth=infinity,errorcursor=false)']) > > > then to see the process's output: > > sage: p.read() > <something> > > -- > You received this message because you are subscribed to the Google Groups > "sage-support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/sage-support. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. 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