Discord.py, Is it possible to run a task every 1 hour?

Question

I want to make a bot that counts the number of online members in a guild every 1 hour. Then, it finds the average "activity" of the server. The problem is that I don't know how to run the "counting task" every 1 hour or so. This is what I ve got so far:

@bot.command()
async def d(ctx):
    memList = []
    for user in ctx.guild.members:
        if user.status == discord.Status.offline:
            memList.append(user.id)

    total = len(memList)
    print(total)

This code counts the members^

from discord.ext import tasks

@tasks.loop(seconds=3600)
async def f(ctx):
    memList = []
    for user in ctx.guild.members:
        if user.status == discord.Status.offline:
            memList.append(user.id)

    total = len(memList)
    print(total)

f.start()

This is supposed to count the members every 1 hour, however, I don't have a way to pass the context for this peace of code: for user in ctx.guild.members:

Answer 1

Bagle's answer really solved my problem with the ctx thing. With their help, I managed to solve the whole problem. So, I decided to post it here for anyone that's interested. This is the finished product:

#The required intents for this task    
intents = discord.Intents.default()
intents.members = True                  
intents.presences = True

#The function
@tasks.loop(hours=1)
async def f():
    guildList = dict() #I want to save the amount of online members in a dictionary for easier access.
    onlineMemList = [] #Temporary list
    for guild in bot.guilds: #Loop through all the guilds
        for user in guild.members: #Loop through every user in the guild
            if user.status == discord.Status.online:
                onlineMemList.append(user.id) #Append the online members to the list
        guildList.update({guild.name: len(onlineMemList)}) #Add the amount of online members to the dictionary with a key of guild.name
        onlineMemList = [] #Empty the list

    print(guildList)

f.start()