Getting a runTime error while trying to reload cogs?

[enterCheesyNameHere]

This is the code for the reload function I'm creating:

     @commands.command(name="reload", help="Reloads a cog(s). Usage: $reload <cogName>")
     async def reload(self, ctx, cog):
        extensions = self.bot.extensions
        if cog == "all":
            for extension in extensions:
                self.bot.reload_extension(extension)
            await ctx.send("Done! All cogs have been reloaded.")
            return

        if cog in extensions:
            self.bot.reload_extension(cog)
            await ctx.send("Done! " + cog + " has been reloaded")
        else:
            await ctx.send("Unkown cog. Type '$listcogs' to see all cogs")

however when I type "$reload all" it gives me "RuntimeError: dictionary keys changed during iteration". When I type "$reload all" again it works, and this repeats over and over again, does anyone know why this is happening? I'm using VS code to run the code.

[ShineyDev]

The problem lines here are:

            for extension in extensions:
                self.bot.reload_extension(extension)

Bot.extensions is a mapping and mappings cannot be modified during iteration.

You should modify the above lines to create a copy of the bot's extensions mapping before iteration.

[enterCheesyNameHere]

Its working perfectly, thanks!