To plot the Press-Schechter function for redshifts 0, 0.5, and 1 using Python, users are seeking either a plotting package or a program that can perform the simulation and generate the plots. While there are existing Python programs available online, users may need to create their own plots from the simulation results. Notable resources mentioned include CosmoloPy and a specific HaloMassFcn script from the yt package, which can potentially be adapted for plotting the Press-Schechter function as part of a course project.