I am trying a medium scale computation. Unfortunately it breaks every time
with error messages I do not know how to interpret.
They may or may not be bugs in sage. Here is a traceback
--------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-6-1e340a4a9be4> in <module>()
----> 1 classify_ord_pe(L,Integer(2),Integer(2),'results/order4.txt','a')
/home/simon/.sage/temp/k3/2030/K3_aut_classification.sageWSsnuG.py in
classify_ord_pe(L, p, e, file_name, rw)
258 print(" ")
259 cofix = cofixed[k].twist(-_sage_const_1 )
--> 260 for Aa in k3_prime_power(fix.genus(), p, e):
261 A, a, Oa = Aa
262 actsg = MaximalK3surfaceAut(A, cofix, a, Oa)
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in k3_prime_power(
genus, prime, e)
138 signatures += [[ranks_E[k]]*(weights[k]//_sage_const_2
) for k in range(_sage_const_1 ,n)]
139 signatures[-_sage_const_1 ][_sage_const_0 ] -= _sage_const_1
--> 140 for act in prime_power_actions(genus,prime,ranks,signatures
):
141 yield act
142
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
prime_power_actions(genus, p, ranks, signatures)
278 # recurse
279 # print(R)
--> 280 for N in prime_power_actions(R, p,
ranks[:-_sage_const_1
], R_signatures):
281 N, fN, GN = N
282 ext = extensions(M, fM, N, fN, GM, GN,
glue_order, p)
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
prime_power_actions(genus, p, ranks, signatures)
278 # recurse
279 # print(R)
--> 280 for N in prime_power_actions(R, p,
ranks[:-_sage_const_1
], R_signatures):
281 N, fN, GN = N
282 ext = extensions(M, fM, N, fN, GM, GN,
glue_order, p)
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
prime_power_actions(genus, p, ranks, signatures)
196 if len(ranks) == _sage_const_1 :
197 # there is nothing to glue
--> 198 for M in genus.representatives():
199 fM = M ** _sage_const_0
200 M = IntegralLattice(M)
/home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/
genera/genus.pyc in representatives(self, backend, algorithm)
3161 if self.signature_pair()[0] == 0:
3162 e *= ZZ(-1)
-> 3163 Q = QuadraticForm(e*self.representative())
3164 seeds = [Q]
3165 for p in self.spinor_generators(proper=False):
/home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/
genera/genus.pyc in representative(self)
3010 """
3011 if self._representative is None:
-> 3012 self._compute_representative()
3013 return self._representative
3014
/home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/genera/genus.pyc
in _compute_representative(self, LLL)
3085 gp = Gp()
3086 m = pari(L)
-> 3087 gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
3088 m = gp.eval('qflllgram_indefgoon(%s)'%m)
3089 # convert the output string to sage
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc
in read(self, filename)
222 sage: os.unlink(filename)
223 """
--> 224 self.eval(self._read_in_file_command(filename))
225
226 def _read_in_file_command(self, filename):
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in eval(self, code, strip, synchronize, locals, allow_use_file, split_lines,
**kwds)
1349 elif split_lines:
1350 return '\n'.join([self._eval_line(L,
allow_use_file=allow_use_file, **kwds)
-> 1351 for L in code.split('\n') if
L != ''])
1352 else:
1353 return self._eval_line(code, allow_use_file=
allow_use_file, **kwds)
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc in
_eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
443 a = Expect._eval_line(self, line,
444 allow_use_file=allow_use_file,
--> 445 wait_for_prompt=wait_for_prompt)
446 if a.find("the PARI stack overflows") != -1:
447 verbose("automatically doubling the PARI stack and
re-executing current input line")
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed
)
914 try:
915 if self._expect is None:
--> 916 self._start()
917 E = self._expect
918 try:
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc in
_start(self, alt_message, block_during_init)
241
242 def _start(self, alt_message=None, block_during_init=True):
--> 243 Expect._start(self, alt_message, block_during_init)
244 # disable memory debugging: those warnings can only confuse
our
245 # interface
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _start(self, alt_message, block_during_init)
517
518 try:
--> 519 self._expect.expect(self._prompt)
520 except (pexpect.TIMEOUT, pexpect.EOF) as msg:
521 self._expect = None
/home/simon/sage/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,
/home/simon/sage/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,
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/expect.pyc in
expect_loop(self, timeout)
109 return self.timeout()
110 # Still have time left, so read more data
--> 111 incoming = spawn.read_nonblocking(spawn.maxread,
timeout)
112 if self.spawn.delayafterread is not None:
113 time.sleep(self.spawn.delayafterread)
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
read_nonblocking(self, size, timeout)
455 # * https://github.com/pexpect/pexpect/pull/304
456 # * http://trac.sagemath.org/ticket/10295
--> 457 if select(0):
458 try:
459 incoming = super(spawn, self).read_nonblocking(size)
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
select(timeout)
447 else:
448 def select(timeout):
--> 449 return select_ignore_interrupts([self.child_fd], [],
[], timeout)[0]
450
451 # If there is data available to read right now, read as
much as
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/utils.pyc in
select_ignore_interrupts(iwtd, owtd, ewtd, timeout)
141 while True:
142 try:
--> 143 return select.select(iwtd, owtd, ewtd, timeout)
144 except InterruptedError:
145 err = sys.exc_info()[1]
ValueError: filedescriptor out of range in select()
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