循环中的 if 和 else 语句问题

Question

您好，我在检查存储在临时字典中的列表代码和匹配存在的代码时遇到问题，如果不存在则 print/await 不同的结果。我通过比较用户加入之前和之后每个邀请的用途来做到这一点。

似乎 if 语句 if invite.uses < find_invite_by_code(invites_after_join, invite.code).uses: 被忽略，而 else 语句被 printed/awaited 而不是过期和 none 过期代码。我不太清楚为什么会这样。帮助将不胜感激。

为了更好地理解，我对部分代码进行了注释。

这是我的代码：

invites = {} #temporary dict to store the codes


# A function to find an invite in a guilds.invites() list

def find_invite_by_code(invite_list, code):

# Simply looping through each invite in an
# invite list which we will get using guild.invites()

    for inv in invite_list:
    
        # Check if the invite code in this element
        # of the list is the one we're looking for
    
        if inv.code == code:
        
            # If it is, we return it.
        
            return inv

@commands.Cog.listener()
async def on_member_join(self, member):
    time = datetime.utcnow()
    users = len([e.name for e in member.guild.members])
    name = member
    name = " ~ ".join((name.name, name.nick)) if name.nick else name.name
    
    # Getting the invites before the user joining
    # from our cache for this specific guild
    invites_before_join = invites[member.guild.id]
    
    # Getting the invites after the user joining
    # so we can compare it with the first one, and
    # see which invite uses number increased
    invites_after_join = await member.guild.invites()

    # Loops for each invite we have for the guild
    # the user joined.
    for invite in invites_before_join:

        # Now, we're using the function we created just
        # before to check which invite count is bigger
        # than it was before the user joined.
        if invite.uses < find_invite_by_code(invites_after_join, invite.code).uses:
            
            # Now that we found which link was used we'll start the embed 
            joinmsg = discord.Embed(title=f'{member.name}#{member.discriminator} has joined', timestamp=time, colour=discord.Color(random.randint(0x000000, 0xFFFFFF)))
            joinmsg.add_field(name="**Account Created:**", value=member.created_at.strftime("%#d %b %Y, at %I:%M%p"), inline=True)
            joinmsg.add_field(name="**Invite:**", value=f"||{invite.code}||", inline=True)
            joinmsg.add_field(name="**Inviter:**", value=f"{invite.inviter}", inline=False)
            joinmsg.set_footer(text=f"Member {users} • User ID: {member.id}")
            joinmsg.set_thumbnail(url=member.avatar_url)
            await self.bot.send_log_message(member.guild, embed=joinmsg)
            
            #We use an else statement if a NoneType is returned this would happen if the invite link has expired.
        else:
            # Create the embed to be sent
            joinmsg = discord.Embed(title=f'{member.name}#{member.discriminator} has joined', timestamp=time, colour=discord.Color(random.randint(0x000000, 0xFFFFFF)))
            joinmsg.add_field(name="**Account Created:**", value=member.created_at.strftime("%#d %b %Y, at %I:%M%p"), inline=True)
            joinmsg.add_field(name="**Invite:**", value=f"Expired", inline=True)
            joinmsg.set_footer(text=f"Member {users} • User ID: {member.id}")
            joinmsg.set_thumbnail(url=member.avatar_url)

            await self.bot.send_log_message(member.guild, embed=joinmsg)
        
            # We will now update our cache so it's ready
            # for the next user that joins the guild
            invites[member.guild.id] = invites_after_join 
            # return to prevent looping when we already got what we want
            return

Answer 1

看起来事情并没有按照你想要的方式发生，我会在它之前添加一个 print 函数并打印 invite.uses 和 find_invite_by_code(invites_after_join, invite.code).uses 的值以及然后把它们的type也打印出来，如果你还是不能发现错误，那我们就有问题了

print(invite.uses, find_invite_by_code(invites_after_join, invite.code).uses)
print(type(invite.uses), type(find_invite_by_code(invites_after_join, invite.code).uses))

循环中的 if 和 else 语句问题

Issue with if and else statement in a loop

python

python-3.x

discord.py

discord.py-rewrite