In my class I have _latex and _sympystr. Your latex() function uses my
_latex but str() does not use _sympystr I have to define __str__() in my
class to print correctly. How should I use _sympystr to return the correct
string.
def _sympystr(self,printer):
if self.order == 0:
return 'D{}'
s = 'D'
for x in self.pdiffs:
s += '{' + printer._print(x) + '}'
n = self.pdiffs[x]
if n > 1:
s += '^' + printer._print(n)
return s
def _latex(self,printer):
if self.order == 0:
return ''
s = r'\frac{\partial'
if self.order > 1:
s += '^{' + printer._print(self.order) + '}'
s += '}{'
keys = list(self.pdiffs.keys())
keys.sort(key=lambda x: x.sort_key())
for key in keys:
i = self.pdiffs[key]
s += r'\partial ' + printer._print(key)
if i > 1:
s += '^{' + printer._print(i) + '}'
s += '}'
return s
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