code: def make_qs(n, m=None):
      
      try:
          import sympy
      except ImportError:
          raise ImportError("This function requires sympy. Please install it.")
      if m is None:
          syms = sympy.symbols(" ".join(f"q{i}" for i in range(n)))
          if isinstance(syms, tuple):
              return syms
          else:
              return (syms,)
      syms = sympy.symbols(" ".join(f"q{i}" for i in range(n, m)))
      if isinstance(syms, tuple):
          return syms
      else:
          return (syms,)
docs: Make sympy symbols q0, q1, ...
      
      Args:
          n(int), m(int, optional):
              If specified both n and m, returns [qn, q(n+1), ..., qm],
              Only n is specified, returns[q0, q1, ..., qn].
  
      Return:
          tuple(Symbol): Tuple of sympy symbols.