Sage 在调用 Mathematica 时挂起
Sage hangs when calling Mathematica
我最近在我的 Fedora 21 机器上安装了 Sage 6.3。我使用的是 6.3 版，它有点过时了，因为它是 yum 存储库中可用的最新版本。我还在同一台计算机上安装了 Mathematica，希望能够从 Sage 中调用它。
使用 math 命令的 Mathematica 终端界面可以工作，根据 this reference page 这应该是我所需要的。但是，当我告诉 Sage 从 Sage 命令行或笔记本使用 mathematica 时，Sage 挂起。这是我与终端交互的示例（回溯很糟糕，在 Sage 中经常出现这种情况）：
sage: mathematica('hello world')
^CInterrupting Mathematica...
^C---------------------------------------------------------------------------
KeyboardInterrupt Traceback (most recent call last)
<ipython-input-1-9208bb19d841> in <module>()
----> 1 mathematica('hello world')
/usr/lib64/python2.7/site-packages/sage/interfaces/interface.pyc in __call__(self, x, name)
197
198 if isinstance(x, basestring):
--> 199 return cls(self, x, name=name)
200 try:
201 return self._coerce_from_special_method(x)
/usr/lib64/python2.7/site-packages/sage/interfaces/expect.pyc in __init__(self, parent, value, is_name, name)
1310 else:
1311 try:
-> 1312 self._name = parent._create(value, name=name)
1313 # Convert ValueError and RuntimeError to TypeError for
1314 # coercion to work properly.
/usr/lib64/python2.7/site-packages/sage/interfaces/interface.pyc in _create(self, value, name)
387 def _create(self, value, name=None):
388 name = self._next_var_name() if name is None else name
--> 389 self.set(name, value)
390 return name
391
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in set(self, var, value)
508 cmd = '%s=%s;'%(var,value)
509 #out = self.eval(cmd)
--> 510 out = self._eval_line(cmd, allow_use_file=True)
511 if len(out) > 8:
512 raise TypeError("Error executing code in Mathematica\nCODE:\n\t%s\nMathematica ERROR:\n\t%s"%(cmd, out))
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
535 def _eval_line(self, line, allow_use_file=True, wait_for_prompt=True, restart_if_needed=False):
536 s = Expect._eval_line(self, line,
--> 537 allow_use_file=allow_use_file, wait_for_prompt=wait_for_prompt)
538 return str(s).strip('\n')
539
/usr/lib64/python2.7/site-packages/sage/interfaces/expect.pyc in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
890 out = ''
891 except KeyboardInterrupt:
--> 892 self._keyboard_interrupt()
893 raise KeyboardInterrupt("Ctrl-c pressed while running %s"%self)
894 if self._terminal_echo:
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in _keyboard_interrupt(self)
420 e = self._expect
421 e.sendline(chr(3)) # send ctrl-c
--> 422 e.expect('Interrupt> ')
423 e.sendline("a") # a -- abort
424 e.expect(self._prompt)
/usr/lib64/sagemath/site-packages/pexpect.pyc in expect(self, pattern, timeout, searchwindowsize)
914 """
915 compiled_pattern_list = self.compile_pattern_list(pattern)
--> 916 return self.expect_list(compiled_pattern_list, timeout, searchwindowsize)
917
918 def expect_list(self, pattern_list, timeout = -1, searchwindowsize = -1):
/usr/lib64/sagemath/site-packages/pexpect.pyc in expect_list(self, pattern_list, timeout, searchwindowsize)
965 raise TIMEOUT ('Timeout exceeded in expect_list().')
966 # Still have time left, so read more data
--> 967 c = self.read_nonblocking (self.maxread, timeout)
968 incoming = incoming + c
969 if timeout is not None:
/usr/lib64/sagemath/site-packages/pexpect.pyc in read_nonblocking(self, size, timeout)
546 raise EOF ('End Of File (EOF) in read_nonblocking(). Pokey platform.')
547
--> 548 r, w, e = select.select([self.child_fd], [], [], timeout)
549 if not r:
550 if not self.isalive():
/usr/lib64/python2.7/site-packages/sage/ext/c_lib.so in sage.ext.c_lib.sage_python_check_interrupt (build/cythonized/sage/ext/c_lib.c:1683)()
/usr/lib64/python2.7/site-packages/sage/ext/c_lib.so in sage.ext.c_lib.sig_raise_exception (build/cythonized/sage/ext/c_lib.c:769)()
KeyboardInterrupt:
sage:
Mathematica 自己的界面中的等效项工作得很好：
Mathematica 10.1.0 for Linux x86 (64-bit)
Copyright 1988-2015 Wolfram Research, Inc.
In[1]:= hello world
Out[1]= hello world
In[2]:=
我是不是做错了什么，或者这是 Sage 中的错误？手动下载和构建最新版本 (6.7) 是否可以解决问题？
编辑:
我正在使用 Mathematica 10.1.0。会不会是我的问题，即旧版本的 Sage 不知道如何处理新版本的 Mathematica？
根据Trac 16703，这个问题应该在最新的 Sage 中得到修复。我个人没有 Mathematica 的副本来测试它。
我最近在我的 Fedora 21 机器上安装了 Sage 6.3。我使用的是 6.3 版，它有点过时了，因为它是 yum 存储库中可用的最新版本。我还在同一台计算机上安装了 Mathematica，希望能够从 Sage 中调用它。
使用 math 命令的 Mathematica 终端界面可以工作，根据 this reference page 这应该是我所需要的。但是，当我告诉 Sage 从 Sage 命令行或笔记本使用 mathematica 时，Sage 挂起。这是我与终端交互的示例（回溯很糟糕，在 Sage 中经常出现这种情况）：
sage: mathematica('hello world')
^CInterrupting Mathematica...
^C---------------------------------------------------------------------------
KeyboardInterrupt Traceback (most recent call last)
<ipython-input-1-9208bb19d841> in <module>()
----> 1 mathematica('hello world')
/usr/lib64/python2.7/site-packages/sage/interfaces/interface.pyc in __call__(self, x, name)
197
198 if isinstance(x, basestring):
--> 199 return cls(self, x, name=name)
200 try:
201 return self._coerce_from_special_method(x)
/usr/lib64/python2.7/site-packages/sage/interfaces/expect.pyc in __init__(self, parent, value, is_name, name)
1310 else:
1311 try:
-> 1312 self._name = parent._create(value, name=name)
1313 # Convert ValueError and RuntimeError to TypeError for
1314 # coercion to work properly.
/usr/lib64/python2.7/site-packages/sage/interfaces/interface.pyc in _create(self, value, name)
387 def _create(self, value, name=None):
388 name = self._next_var_name() if name is None else name
--> 389 self.set(name, value)
390 return name
391
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in set(self, var, value)
508 cmd = '%s=%s;'%(var,value)
509 #out = self.eval(cmd)
--> 510 out = self._eval_line(cmd, allow_use_file=True)
511 if len(out) > 8:
512 raise TypeError("Error executing code in Mathematica\nCODE:\n\t%s\nMathematica ERROR:\n\t%s"%(cmd, out))
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
535 def _eval_line(self, line, allow_use_file=True, wait_for_prompt=True, restart_if_needed=False):
536 s = Expect._eval_line(self, line,
--> 537 allow_use_file=allow_use_file, wait_for_prompt=wait_for_prompt)
538 return str(s).strip('\n')
539
/usr/lib64/python2.7/site-packages/sage/interfaces/expect.pyc in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
890 out = ''
891 except KeyboardInterrupt:
--> 892 self._keyboard_interrupt()
893 raise KeyboardInterrupt("Ctrl-c pressed while running %s"%self)
894 if self._terminal_echo:
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in _keyboard_interrupt(self)
420 e = self._expect
421 e.sendline(chr(3)) # send ctrl-c
--> 422 e.expect('Interrupt> ')
423 e.sendline("a") # a -- abort
424 e.expect(self._prompt)
/usr/lib64/sagemath/site-packages/pexpect.pyc in expect(self, pattern, timeout, searchwindowsize)
914 """
915 compiled_pattern_list = self.compile_pattern_list(pattern)
--> 916 return self.expect_list(compiled_pattern_list, timeout, searchwindowsize)
917
918 def expect_list(self, pattern_list, timeout = -1, searchwindowsize = -1):
/usr/lib64/sagemath/site-packages/pexpect.pyc in expect_list(self, pattern_list, timeout, searchwindowsize)
965 raise TIMEOUT ('Timeout exceeded in expect_list().')
966 # Still have time left, so read more data
--> 967 c = self.read_nonblocking (self.maxread, timeout)
968 incoming = incoming + c
969 if timeout is not None:
/usr/lib64/sagemath/site-packages/pexpect.pyc in read_nonblocking(self, size, timeout)
546 raise EOF ('End Of File (EOF) in read_nonblocking(). Pokey platform.')
547
--> 548 r, w, e = select.select([self.child_fd], [], [], timeout)
549 if not r:
550 if not self.isalive():
/usr/lib64/python2.7/site-packages/sage/ext/c_lib.so in sage.ext.c_lib.sage_python_check_interrupt (build/cythonized/sage/ext/c_lib.c:1683)()
/usr/lib64/python2.7/site-packages/sage/ext/c_lib.so in sage.ext.c_lib.sig_raise_exception (build/cythonized/sage/ext/c_lib.c:769)()
KeyboardInterrupt:
sage:
Mathematica 自己的界面中的等效项工作得很好：
Mathematica 10.1.0 for Linux x86 (64-bit)
Copyright 1988-2015 Wolfram Research, Inc.
In[1]:= hello world
Out[1]= hello world
In[2]:=
我是不是做错了什么，或者这是 Sage 中的错误？手动下载和构建最新版本 (6.7) 是否可以解决问题？
编辑:
我正在使用 Mathematica 10.1.0。会不会是我的问题，即旧版本的 Sage 不知道如何处理新版本的 Mathematica？
根据Trac 16703，这个问题应该在最新的 Sage 中得到修复。我个人没有 Mathematica 的副本来测试它。