In python's repl: ```python import sympy sympy.init_printing(use_unicode=False) sympy.simplify(x ** 2 + 2 * x + 1) ``` the result is ``` 2 x + 2*x + 1 ``` However, in ptpython, it always be ``` x ** 2 + 2 * x + 1 ``` It seems that `sympy.init_printing` cannot work in ptpython.