I tried more on this problem.
Trying for maple('3*4'), what does this error mean?
TypeError: An error occurred running a Maple command:
INPUT:
sage6:=3*4:;
OUTPUT:
on line 9, syntax error, control character unexpected:
A
^
B
On Fri, Mar 8, 2019 at 4:06 PM benyamin alizade <
[email protected]> wrote:
> Thanks for your comments. Unfortunately, it did not solve my problem.
>
>
>
> On Wed, Mar 6, 2019 at 8:12 PM 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>
>>
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>
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