从flask中的蓝图文件导入错误？

Question

我的文件结构是这样的：

endpoints/
    __init__.py
    apartments.py
services/
    __init__.py
    apartment.py
__init__.py
app.py

在app.py中

from flask import Flask

from endpoints.apartments import apartments_blueprint

app = Flask(__name__)

app.register_blueprint(apartments_blueprint, url_prefix='/apartments')

在apartments.py中：

from flask import Blueprint, request
from services.apartment import ApartmentService

apartments_blueprint = Blueprint('apartments', __name__)


@apartments_blueprint.route('/create', methods=['POST'])
def create():
    print(request.data)
    ApartmentService.create_apartment('asdf')

但是，当我运行此flask run时，它显示：

ImportError: No module named services.apartment

Answer 1

服务是从endpoints.apartment导入的相对内容。将前导..添加到导入应该会更正您的错误：

from ..services.apartment import ApartmentService

由于Python3要求相对导入是显式的，并且您可能并不总是从包目录执行此操作，因此您还应该在app.py中向导入添加一个前导.

from .endpoints.apartments import apartments_blueprint

使其明确，并避免任何额外的问题。