ImportError : cannot import DAG airflow

问题:

I have simple code, I am trying to import DAG from airflow

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')

But, I am getting Import Error

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 version installed 1.9.0

I don't know where I am going wrong

回答1:

This is similar to Package import failure in Python 3.5

When you name your Python script airflow.py, the statement from airflow import DAG ends up trying to import DAG from the script itself, not the airflow package.

The lesson is no never call your Python scripts the same as built-in modules or 3rd party pacakges you have installed.

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