def to_stringio(self,
oss,
nb_digits,
use_space,
var_namer=lambda v: v.lp_name):
# INTERNAL
# Writes unicode representation of self
c = 0
# noinspection PyPep8Naming
SP = u' '
for v, coeff in self.iter_sorted_terms():
if not coeff:
continue # pragma: no cover
# 1 separator
if use_space and c > 0:
oss.write(SP)
# ---
# sign is printed if non-first OR negative
# at the end of this block coeff is positive
if coeff < 0 or c > 0:
oss.write(u'-' if coeff < 0 else u'+')
if coeff < 0:
coeff = -coeff
if use_space and c > 0:
oss.write(SP)
# ---
if 1 != coeff:
self._num_to_stringio(oss, coeff, nb_digits)
if use_space:
oss.write(SP)
varname = var_namer(v)
oss.write(unitext(varname))
c += 1
k = self.constant
if c == 0:
self._num_to_stringio(oss, k, nb_digits)
elif k != 0:
if k < 0:
sign = u'-'
k = -k
else:
sign = u'+'
if use_space:
oss.write(SP)
oss.write(sign)
if use_space:
oss.write(SP)
self._num_to_stringio(oss, k, nb_digits)
def to_stringio(self, oss, nb_digits, use_space, var_namer=lambda v: v.lp_name):
self_coef = self._coef
if self_coef != 1:
if self_coef < 0:
oss.write(u'-')
self_coef = - self_coef
if self_coef != 1:
self._num_to_stringio(oss, num=self_coef, ndigits=nb_digits)
if use_space:
oss.write(u' ')
oss.write(unitext(var_namer(self._dvar)))
def to_stringio(self,
oss,
nb_digits,
use_space,
var_namer=lambda v: v.lp_name):
q = 0
# noinspection PyPep8Naming
SP = u' '
for qvp, qk in self.iter_sorted_quads():
if not qk:
continue
qv1 = qvp.first
qv2 = qvp.second
# ---
# sign is printed if non-first OR negative
# at the end of this block coeff is positive
if qk < 0 or q > 0:
oss.write(u'-' if qk < 0 else u'+')
if qk < 0:
qk = -qk
if use_space and q > 0:
oss.write(SP)
# write coeff if <> 1
varname1 = var_namer(qv1)
if 1 != qk:
self._num_to_stringio(oss, num=qk, ndigits=nb_digits)
if use_space:
oss.write(SP)
oss.write(unitext(varname1))
if qv1 is qv2:
oss.write(u"^2")
else:
if use_space:
oss.write(SP)
oss.write(u'*')
oss.write(SP)
else:
oss.write(u'*')
oss.write(unitext(var_namer(qv2)))
q += 1
# problem for linexpr: force '+' ssi c>0
linexpr = self._linexpr
lin_constant = linexpr.get_constant()
if linexpr:
first_lk = 0
for lv, lk in linexpr.iter_terms():
if lk:
first_lk = lk
break
if q > 0 and first_lk > 0:
if use_space:
oss.write(u' ')
oss.write(u"+")
if first_lk:
if use_space:
oss.write(SP)
self._linexpr.to_stringio(oss, nb_digits, use_space, var_namer)
elif lin_constant:
self._num_to_stringio(oss,
lin_constant,
nb_digits,
print_sign=True,
force_plus=q > 0,
use_space=use_space)
elif not q:
oss.write(u'0')