code: def _str_or_latex(label):
      if isinstance(label, Basic):
          return latex(label, mode="inline")
      return str(label)
  
file_path: sympy/sympy/plotting/backends/matplotlibbackend/matplotlib.py
imports: from collections.abc import Callable
  from sympy.core.basic import Basic
  from sympy.external import import_module
  import sympy.plotting.backends.base_backend
  from sympy.printing.latex import latex
label_desc: Use image node_id 1 for calling a global function with example usage: _str_or_latex(label) and returns: str, latex