ImportError：无法导入DAG气流

Question

我有简单的代码，我正试图从气流导入DAG

from airflow import DAG
from airflow.operators import BashOperator,S3KeySensor
from datetime import datetime, timedelta
import psycopg2
from datetime import date, timedelta

yesterday = date.today() - timedelta(1)
yesterdayDate = yesterday.strftime('%Y-%m-%d')

但是，我收到导入错误

Traceback (most recent call last):
  File "airflow.py", line 9, in <module>
    from airflow import DAG
  File "/home/ubuntu/airflow/dags/airflow.py", line 9, in <module>
    from airflow import DAG
ImportError: cannot import name DAG

apache-airflow版本安装1.9.0

我不知道我哪里出错了

Answer 1

这类似于Package import failure in Python 3.5

当您命名Python脚本airflow.py时，语句from airflow import DAG最终会尝试从脚本本身导入DAG，而不是airflow包。

本课程绝不会将您的Python脚本称为与已安装的内置模块或第三方pacakges相同。