Using sympy plot_implicit function drawing implicit function of library, the implicit function existence sign symbol function, always appear the following error:
String fallback in sympify has had been deprecated since SymPy 1.6. Use the
Sympify (STR (obj)) or sympy. Core. Sympify. The converter or obj. _sympy_
Home. See https://github.com/sympy/sympy/issues/18066 for more
Info.

Deprecated_since_version='1.6'
D: \ Anaconda3 \ envs \ pytorch \ lib \ site - packages \ sympy \ plotting \ plot_implicit py: 85: UserWarning: the Adaptive meshing could not be applied to the expression, Using uniform meshing.
Warnings. Warn (" the Adaptive meshing could not be applied to the "

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