pharzan

# create a bakup:

sudo su - postgres
pg_dump postgres > postgres_db.bak

# options:
pg_dump -U user_name -h remote_host -p remote_port name_of_database > name_of_backup_file

pharzan

After installing postgreSQL and rebooting Mint when recieved I would recieve the following error saying can't start postgres
while trying to run Django
could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain 
socket “/var/run/postgresql/.s.PGSQL.5432”?


sudo mkdir /var/log/postgresql
sudo chown postgres.postgres /var/log/postgresql
sudo su postgres
touch /var/log/postgresql/postgresql-9.1-main.log

pharzan

So how can I question a variable that is a NoneType?
Use is operator, like this
  ''
    if variable is None:
  ''
Why this works?

Since None is the sole singleton object of NoneType in Python, we can use is operator to check if a variable has None in it or not.

Quoting from is docs,

pharzan

So how can I question a variable that is a NoneType?
Use is operator, like this
  ''
    if variable is None:
  ''
Why this works?

Since None is the sole singleton object of NoneType in Python, we can use is operator to check if a variable has None in it or not.

Quoting from is docs,

pharzan

So how can I question a variable that is a NoneType?
Use is operator, like this
  ''
    if variable is None:
  ''
Why this works?

Since None is the sole singleton object of NoneType in Python, we can use is operator to check if a variable has None in it or not.

Quoting from is docs,

pharzan

# inside the script we should have something like below:
def run(*script_args):  
    print (script_args)
    
# from the shell when calling the script to run use the --script-args to pass in arguments and they will be recieved as tuples inside the script

#-> example: python manage.py runscript myscript --script-args Testing 123
will return ('Testing','123')

pharzan

# inside the script we should have something like below:
def run(*script_args):  
    print (script_args)
    
# from the shell when calling the script to run use the --script-args to pass in arguments and they will be recieved as tuples inside the script

#-> example: python manage.py runscript myscript --script-args Testing 123
will return ('Testing','123')

pharzan

Keybase proof

I hereby claim:

• I am pharzan on github.
• I am pharzan (https://keybase.io/pharzan) on keybase.
• I have a public key ASD7kHx7hIepix8J9Oyrh6QAK0VIXiksugOW_TuQgdIv2wo

To claim this, I am signing this object:

pharzan

#listens to the above run to
#FLASK_APP=server.py FLASK_DEBUG=1 python3.5 -m flask run -h 192.168.1.124 -p 8999:
#run this on the local server to listen to socket communication 

from flask import Flask, render_template, jsonify
from flask import request as query

app = Flask(__name__)

pharzan

#to format:
from flashbdev import bdev
uos.VfsFat.mkfs(bdev)
vfs = uos.VfsFat(bdev, "")
# to create a boot.py file:

with open("/boot.py", "w") as f:
    f.write("""\
# This file is executed on every boot (including wake-boot from deepsleep)
import esp