def _print_Derivative(self, deriv):
from sympy.physics.vector.functions import dynamicsymbols
# XXX use U('PARTIAL DIFFERENTIAL') here ?
t = dynamicsymbols._t
dot_i = 0
syms = list(reversed(deriv.variables))
while len(syms) > 0:
if syms[-1] == t:
syms.pop()
dot_i += 1
else:
return super(VectorPrettyPrinter,
self)._print_Derivative(deriv)
if not (isinstance(type(deriv.expr), UndefinedFunction) and
(deriv.expr.args == (t, ))):
return super(VectorPrettyPrinter, self)._print_Derivative(deriv)
else:
pform = self._print_Function(deriv.expr)
# the following condition would happen with some sort of non-standard
# dynamic symbol I guess, so we'll just print the SymPy way
if len(pform.picture) > 1:
return super(VectorPrettyPrinter, self)._print_Derivative(deriv)
# There are only special symbols up to fourth-order derivatives
if dot_i >= 5:
return super(VectorPrettyPrinter, self)._print_Derivative(deriv)
# Deal with special symbols
dots = {
0: u"",
1: u"\N{COMBINING DOT ABOVE}",
2: u"\N{COMBINING DIAERESIS}",
3: u"\N{COMBINING THREE DOTS ABOVE}",
4: u"\N{COMBINING FOUR DOTS ABOVE}"
}
d = pform.__dict__
#if unicode is false then calculate number of apostrophes needed and add to output
if not self._use_unicode:
apostrophes = ""
for i in range(0, dot_i):
apostrophes += "'"
d['picture'][0] += apostrophes + "(t)"
else:
d['picture'] = [center_accent(d['picture'][0], dots[dot_i])]
d['unicode'] = center_accent(d['unicode'], dots[dot_i])
return pform
def _print_Derivative(self, deriv):
from sympy.physics.vector.functions import dynamicsymbols
# XXX use U('PARTIAL DIFFERENTIAL') here ?
t = dynamicsymbols._t
dot_i = 0
syms = list(reversed(deriv.variables))
while len(syms) > 0:
if syms[-1] == t:
syms.pop()
dot_i += 1
else:
return super(VectorPrettyPrinter, self)._print_Derivative(deriv)
if not (isinstance(type(deriv.expr), UndefinedFunction)
and (deriv.expr.args == (t,))):
return super(VectorPrettyPrinter, self)._print_Derivative(deriv)
else:
pform = self._print_Function(deriv.expr)
# the following condition would happen with some sort of non-standard
# dynamic symbol I guess, so we'll just print the SymPy way
if len(pform.picture) > 1:
return super(VectorPrettyPrinter, self)._print_Derivative(deriv)
# There are only special symbols up to fourth-order derivatives
if dot_i >= 5:
return super(VectorPrettyPrinter, self)._print_Derivative(deriv)
# Deal with special symbols
dots = {0 : u"",
1 : u"\N{COMBINING DOT ABOVE}",
2 : u"\N{COMBINING DIAERESIS}",
3 : u"\N{COMBINING THREE DOTS ABOVE}",
4 : u"\N{COMBINING FOUR DOTS ABOVE}"}
d = pform.__dict__
#if unicode is false then calculate number of apostrophes needed and add to output
if not self._use_unicode:
apostrophes = ""
for i in range(0, dot_i):
apostrophes += "'"
d['picture'][0] += apostrophes + "(t)"
else:
d['picture'] = [center_accent(d['picture'][0], dots[dot_i])]
d['unicode'] = center_accent(d['unicode'], dots[dot_i])
return pform