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.
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