2023-07-20 16:50:15 +0100 received badge ● Popular Question (source) 2022-08-10 18:29:01 +0100 received badge ● Notable Question (source) 2022-04-04 15:55:45 +0100 asked a question laurent series laurent series Is the number of terms of a Laurent series fixed? E.g. P. = LaurentSeriesRing(QQ) 1/P([1 for t 2018-09-22 09:49:31 +0100 received badge ● Famous Question (source) 2015-09-08 15:33:22 +0100 asked a question cython convert mpc_t to ComplexNumber I wish to return the result of a calculation done in Cython with the result of mpc_t to ComplexNumber from sage.libs.mpc cimport * cpdef f(): cdef mpc_t z mpc_init2(z, 1024) mpc_set_ui(z, 11, MPC_RNDNN) # how to convert the result to a ComplexNumber with the corresponding precision??? return ?  This should return ComplexNumber(7,0) with precision 1024 bits. What is the correct spell? The real counterpart just works fine: from sage.rings.real_mpfr cimport RealNumber from sage.rings.real_mpfr import RealField cpdef g(): cdef RealNumber my_number = RealField(128)(5) mpfr_mul_ui(my_number.value, my_number.value, 17, MPFR_RNDN) return my_number  returns 85.000000000000000000000000000000000000 as it should. 2014-09-30 20:16:48 +0100 received badge ● Notable Question (source) 2014-09-29 21:05:39 +0100 asked a question passing options to superclass method I would like to modify the plot code of a plot attribute in a derived class class Foo(Bar): def plot(self, **options): super(Foo, self).plot(options)  This does not seem to work. What is the right way to pass the options? 2013-08-28 12:21:24 +0100 received badge ● Popular Question (source) 2013-05-03 09:45:43 +0100 received badge ● Popular Question (source) 2011-10-14 00:47:27 +0100 asked a question pickling extension classes What is the right way to pickle a cython extension class? Consider the example cdef class Stuff: def __init__(self): pass  then a = Stuff() a == loads(dumps(a))  gives the result False because the address of the new object generated by loads is different from the original object a. 2011-07-15 03:47:47 +0100 received badge ● Editor (source) 2011-07-14 17:57:09 +0100 received badge ● Student (source) 2011-07-14 17:07:05 +0100 asked a question cython stl class sage complains about importing the following spyx file: from libcpp.vector cimport vector as vec cdef test_vector(): cdef vec[int] vect cdef int i for i in range(10): vect.push_back(i) for i in range(10): print vect[i]  I have no problem translating a pyx file with the same contents with cython and generating a module with test_vector ... . What is the right way to access the stl cpp vector class in a pyx file?