• 操作系统Linux Mint 18.3（但版本19也有相同的问题）

已安装Python3和Sqlite3 *
在“pip /pip 3”遇到很多麻烦之后，我设法安装了Peewee。
我尝试使用python3 peewee.py运行以下示例脚本，但得到以下错误：

脚本（peewee.py）

from peewee import *

db = SqliteDatabase("people.db")

class Person(Model):
    name = CharField()
    birthday = DateField()

    class Meta:
        database = db # This model uses the "people.db" database.

class Pet(Model):
    owner = ForeignKeyField(Person, backref='pets')
    name = CharField()
    animal_type = CharField()

    class Meta:
        database = db # this model uses the "people.db" database

db.connect()

错误

Traceback (most recent call last):
  File "peewee.py", line 3, in <module>
    from peewee import *
  File "/home/.../peewee.py", line 6, in <module>
    db = SqliteDatabase("people.db")
NameError: name 'SqliteDatabase' is not defined

我已经在google / StackOverflow上做了广泛的研究，但我不能解决这个问题。你能帮我吗？