py3: get rid of an hex problem

[fchapoton]

Starting sage with python3 stop with

/usr/lib64/python3.6/site-packages/sage/rings/real_mpfr.pyx in init sage.rings.real_mpfr()
   2033 
   2034             sage: [RR(s).hex() for s in ['+inf', '-inf', 'nan']]
   2035             ['inf', '-inf', 'nan']
   2036         """
   2037         cdef char *s
   2038         cdef int r
   2039         sig_on()
   2040         r = mpfr_asprintf(&s, "%Ra", self.value)
   2041         sig_off()
   2042         if r < 0:  # MPFR free()s its buffer itself in this case
   2043             raise RuntimeError("unable to convert an mpfr number to a string")
   2044         t = str(s)
   2045         mpfr_free_str(s)
   2046         return t
   2047 
-> 2048     hex = __hex__
        global hex = undefined
        global __hex__ = undefined
   2049 
   2050     def __copy__(self):
   2051         """
   2052         Return copy of ``self`` - since ``self`` is immutable, we just return
   2053         ``self`` again.
   2054 
   2055         EXAMPLES::
   2056 
   2057             sage: a = 3.5
   2058             sage: copy(a) is  a
   2059             True
   2060         """
   2061         return self    # since object is immutable.
   2062 
   2063     def _integer_(self, Z=None):

NameError: name '__hex__' is not defined

CC: @kiwifb

Component: python3

Author: Frédéric Chapoton

Branch/Commit: 358ef36

Reviewer: François Bissey

Issue created by migration from https://trac.sagemath.org/ticket/24201

[fchapoton]

Commit: 358ef36

[fchapoton]

Author: Frédéric Chapoton

[fchapoton]

comment:1

here is a tentative, maybe sufficient ?

---

New commits:

358ef36

py3: get rid of an hex alias

[fchapoton]

Branch: u/chapoton/24201

[kiwifb]

comment:2

Well, that get us a tiny bit further

/usr/lib64/python3.6/site-packages/sage/rings/real_mpfr.pyx in init sage.rings.real_mpfr()
   2033 
   2034             sage: [hex(RR(s)) for s in ['+inf', '-inf', 'nan']]
   2035             ['inf', '-inf', 'nan']
   2036         """
   2037         cdef char *s
   2038         cdef int r
   2039         sig_on()
   2040         r = mpfr_asprintf(&s, "%Ra", self.value)
   2041         sig_off()
   2042         if r < 0:  # MPFR free()s its buffer itself in this case
   2043             raise RuntimeError("unable to convert an mpfr number to a string")
   2044         t = str(s)
   2045         mpfr_free_str(s)
   2046         return t
   2047 
-> 2048     def __copy__(self):
        global __copy__ = undefined
        global self = undefined
   2049         """
   2050         Return copy of ``self`` - since ``self`` is immutable, we just return
   2051         ``self`` again.
   2052 
   2053         EXAMPLES::
   2054 
   2055             sage: a = 3.5
   2056             sage: copy(a) is  a
   2057             True
   2058         """
   2059         return self    # since object is immutable.
   2060 
   2061     def _integer_(self, Z=None):
   2062         """
   2063         If this floating-point number is actually an integer, return that

NameError: name '__hex__' is not defined

but it now complains about __exe__????

[fchapoton]

comment:3

Well. Could be a circular import problem. Maybe try to apply the changes in

sagemath/sagetrac-mirror@2ffe4e2...public/python3-experiment-8.1.rc0

Could you also please confirm that using the full branch "public/python3-experiment-8.1.rc0" gives you a starting python3-sage ? Nobody else told me that..

[kiwifb]

comment:4

I am a dummy, I just applied the patch but didn't re-compile when it is a .pyx file - I won't do much with my sage-on-gentoo install so close to bed time (local time). I will put testing your branch on my TODO list for tomorrow. I need to convert it into a patch first to use in my own build system.

[fchapoton]

comment:5

green bot

[kiwifb]

Reviewer: François Bissey

[kiwifb]

comment:7

What an idiot. I changed the description (in my defence it was empty) instead of commenting. So here is the comment:

Once recompiled things go OK, next problem is in finite_enumerated_sets.py. I see you already have something for that.

And let's put a description.

[vbraun]

Changed branch from u/chapoton/24201 to 358ef36