Home/ hari/Answers
Ask hari
  1. Asked: May 2, 2023In:

    Airflow on AWS EC2 instance with Ubuntu

    hari
    This answer was edited.

    sudo apt updatesudo apt install python3-pipsudo apt install sqlite3sudo apt install python3.10-venvsudo apt-get install libpq-devsource venv/bin/activatepip install "apache-airflow[postgres]==2.5.0" --constraint "https://raw.githubusercontent.com/apache/airflow/constraints-2.5.0/constraints-3.7.txt"Read more

    sudo apt update

    sudo apt install python3-pip

    sudo apt install sqlite3

    sudo apt install python3.10-venv

    sudo apt-get install libpq-dev

    source venv/bin/activate

    pip install "apache-airflow[postgres]==2.5.0" --constraint "https://raw.githubusercontent.com/apache/airflow/constraints-2.5.0/constraints-3.7.txt"

    airflow db init

    sudo apt-get install postgresql postgresql-contrib

    sudo -i -u postgres

    psql

    CREATE DATABASE airflow;
    CREATE USER airflow WITH PASSWORD 'airflow';
    GRANT ALL PRIVILEGES ON DATABASE airflow TO airflow;

    sed -i 's#sqlite:////home/ubuntu/airflow/airflow.db#postgresql+psycopg2://airflow:airflow@localhost/airflow#g' airflow.cfg

    sed -i 's#SequentialExecutor#LocalExecutor#g' airflow.cfg

    airflow db init

    airflow users create -u airflow -f airflow -l airflow -r Admin -e airflow@gmail.com

    airflow webserver &

    airflow scheduler
    See less
    • 0
  2. Asked: April 24, 2023In:

    How do I sort a list of dictionaries by a value of the dictionary?

    hari
    This answer was edited.

    NA

    NA

    See less
    • 0
  3. Asked: August 16, 2022In:

    ModuleNotFoundError: No module named ‘boto3’

    hari

    install by using below command pip install boto3

    install by using below command

    pip install boto3
    See less
    • 0
  4. Asked: September 5, 2021In:

    Difference between Primary key and Unique key

    hari

    you can have many UNIQUE constraints per table, but only one PRIMARY KEY constraint per table.

    you can have many UNIQUE constraints per table, but only one PRIMARY KEY constraint per table.

    See less
    • 0
  5. Asked: January 29, 2023In:

    Django DateTime form widget in forms

    hari
    This answer was edited.

    date_sortie = forms.DateField(label='Release year',required=False, widget=forms.SelectDateWidget)

    date_sortie = forms.DateField(label='Release year',
    required=False, widget=forms.SelectDateWidget)
    See less
    • 0
  6. Asked: January 29, 2023In:

    Difference between auto_now and auto_now_add-django

    hari

    auto_now it updates field each time, while auto_now_add updates on creation only

    auto_now it updates field each time, while auto_now_add updates on creation only

    See less
    • 0
  7. Asked: January 27, 2023In:

    difference between ‘content’ and ‘text’

    hari

    r.text is the content of the response in Unicode, and r.content is the content of the response in bytes.

    r.text is the content of the response in Unicode, and r.content is the content of the response in bytes.

    See less
    • 0
  8. Asked: January 2, 2023In:

    Best treatment for kidney stone

    hari

    Best Treatment for Kidney Stone is below.. To relieve mild pain, your doctor may recommend pain relievers such as ibuprofen (Advil, Motrin IB, others) or naproxen sodium (Aleve). Medical therapy. Your doctor may give you a medication to help pass your kidney stone.

    Best Treatment for Kidney Stone is below..

    To relieve mild pain, your doctor may recommend pain relievers such as ibuprofen (Advil, Motrin IB, others) or naproxen sodium (Aleve). Medical therapy. Your doctor may give you a medication to help pass your kidney stone.

    See less
    • 0
  9. Asked: November 3, 2022In:

    what does MySQL TRUNCATE Table

    hari

    what does MySQL TRUNCATE Table If you want to delete entire data from MySQL/SQL table without deleting table structure you can use mysql truncate table TRUNCATE TABLE table_name;

    what does MySQL TRUNCATE Table

    If you want to delete entire data from MySQL/SQL table without deleting table structure you can use mysql truncate table

    TRUNCATE TABLE table_name;
    See less
    • 0
  10. Asked: November 2, 2022In:

    difference between signed and unsigned int

    hari
    This answer was edited.

    In signed int can store positive and negative values In Unsigned Int can store only positive values

    In signed int can store positive and negative values

    In Unsigned Int can store only positive values

    See less
    • 0