in src/latex2sympy2_extended/latex2sympy2.py [0:0]
def get_differential_var_str(self, text):
for i in range(1, len(text)):
c = text[i]
if not (c == " " or c == "\r" or c == "\n" or c == "\t"):
idx = i
break
text = text[idx:]
if text[0] == "\\":
text = text[1:]
return text