限制peewee檢索的行數

Question

我有以下python源文件可從MySQL數據庫檢索行。 問題在於訂戶表中要檢索的行太多。 如何限制要檢索和處理的小部分行等等？

class subinfo(peewee.Model):
    sub_id = peewee.IntegerField()
    active = peewee.BooleanField()
    sub_type = peewee.IntegerField()
    sub_cat = peewee.TextField()

    class Meta:
        database = locdb

class subscriber(peewee.Model):
    sub_id = peewee.IntegerField(unique=True, primary_key=True)
    sub_start = peewee.DateTimeField()
    sub_end = peewee.DateTimeField()
    ref_id = peewee.BigIntegerField()
    class Meta:
        database = locdb

for row in subscriber.select():
    if(row.sub_start >= peewee.datetime.datetime.now()):
        sub1, created = subinfo.get_or_create(sub_id=row.sub_id, active=True)
        if(created == False & sub1.active == False):
            q = subinfo.update(active=True).where(sub_id=row.sub_id)
            q.execute()
    else:
        subinfo.get_or_create(sub_id=row.sub_id, active=False)

Answer 1

for row in subscriber.select()

對前100行執行此操作：

 for row in subscriber.select().limit(100)

后100行：

 for row in subscriber.select().limit(100).offset(100)

等等。