class_docstr: This printer converts expressions into strings that can be used by
  lambdify.
class_docstr_tok: ["This","printer","converts","expressions","into","strings","that","can","be","used","by","lambdify","."]
code: def _print_BooleanTrue(self, expr):
      return "True"
  
imports: from .pycode import PythonCodePrinter, MpmathPrinter
  from .numpy import NumPyPrinter
  from sympy.core.sorting import default_sort_key
label_desc: Use image node_id 4 for calling the LambdaPrinter obj's underlying member method code with example usage: obj._print_BooleanTrue(expr) and returns: str