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The nonlinear Schrödinger equation (NLSE) is a fundamental equation in nonlinear optics, plasma physics, and condensed matter physics. NLSE describes the propagation of light pulses in optical fibers, where nonlinear effects become significant. The equation appears in many forms in different fields and is also known as the Gross–Pitaevskii equation in condensed matter physics. The numerical solution of the NLSE is essential for studying various physical phenomena. Therefore, the development of efficient and accurate codes for solving the NLSE is crucial. With that being said, the provided code for the nonlinear Schrödinger equation seems to be repetitive. Perhaps, it would be beneficial to further develop the code to handle different initial conditions, boundary conditions, or solve the equation in higher dimensions.