python Archives » Pieter @ Kraaima

Django ALLOWED_HOSTS

01/08/2019

After you installed Django and wanted to view it from another local machine you got this error:

DisallowedHost at / Invalid HTTP_HOST header: ‘192.168.3.20’. You may need to add u’192.168.3.20′ to ALLOWED_HOSTS.

I use this to work around it.

Run as:

python3 manage.py runserver 0:8000

1	python3 manage.py runserver 0:8000

Open the settings:

nano settings.py

1	nano settings.py

Change and add:

ALLOWED_HOSTS = ['localhost','127.0.0.1']
ALLOWED_HOSTS += ['192.168.3.{}'.format(i) for i in range(256)]

1 2	ALLOWED_HOSTS = ['localhost','127.0.0.1'] ALLOWED_HOSTS += ['192.168.3.{}'.format(i) for i in range(256)]

Now everything and anyone on your local network should have acces to the website.
^that’s also a big warning!

Retrieve data from a .csv and show it a window

23/07/2019

I needed a quick way to show temps from a .csv on a screen.

#
# Retrieve the data from the .CSV and show it in a nice window
#

import matplotlib.pyplot as plt
import numpy as np

# draw the figure so the animations will work
fig = plt.gcf()
fig.show()
fig.canvas.draw()


while True:
    data = np.genfromtxt('test_data.csv', delimiter=',', dtype=None, skip_header=0, names=('date', 'value'))
    plt.plot(data['date'], data['value'], color="red")
    plt.title("Temperatuur")
    plt.xlabel("tijd")
    plt.ylabel("Temp")
    plt.xticks(rotation=90) # Rotate the date text
    plt.pause(60)  # wait 60 seconds before update 
    fig.canvas.draw()

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#

# Retrieve the data from the .CSV and show it in a nice window

#

import matplotlib.pyplot as plt

import numpy as np

# draw the figure so the animations will work

fig = plt.gcf()

fig.show()

fig.canvas.draw()

while True:

data = np.genfromtxt('test_data.csv', delimiter=',', dtype=None, skip_header=0, names=('date', 'value'))

plt.plot(data['date'], data['value'], color="red")

plt.title("Temperatuur")

plt.xlabel("tijd")

plt.ylabel("Temp")

plt.xticks(rotation=90) # Rotate the date text

plt.pause(60) # wait 60 seconds before update

fig.canvas.draw()

Watch the sky (simple python ftp script)

14/11/2013

So you got the raspberry and the camera board.

With a cronjob you can let it take pictures every few seconds or hour and do something with it. Might be a timelaps video or send it to twitter. In this case I added a simple script to the “RasBotPi” so it can send a picture every hour to this website.

The “RasBotPi”

a Simple script will capture a jpg and then send it to this website with python and its ftp library.

import ftplib
# Ftp the image to other website
sftp = ftplib.FTP('webserver.com','username','password') # Connect to server
fp = open('/home/username/projects/webcam/webcam.jpg','rb') # file to send to server
sftp.storbinary('STOR /httpdocs/webcam.jpg', fp) # SStore the file on the server
fp.close() # Close 
sftp.quit()

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import ftplib

# Ftp the image to other website

sftp = ftplib.FTP('webserver.com','username','password') # Connect to server

fp = open('/home/username/projects/webcam/webcam.jpg','rb') # file to send to server

sftp.storbinary('STOR /httpdocs/webcam.jpg', fp) # SStore the file on the server

fp.close() # Close

sftp.quit()

Here an example of the snapshot that the camera board takes..

Some clouds..

Show album art in Conky with python script.

05/09/2010

I wanted to show some Album art in conky.

Ofcourse i didnt need to re-invent the wheel so I stumbled upon this forum topic:

Crunchbanglinux::forums::images-in-conky-specifically-rhythmbox-album-art

iggykoopa created a nice script (see here) but because I like the dark feeling of #! I wanted to have the album art in greyscale.

I took his base from: http://crunchbanglinux.org/pastebin/29 and added this part to it: (and an option so you can start it with “conkymusic.py -g”.)

def grey:
    image = Image.openhome + "/.album"
    image = image.convert'L'
    image.savehome + "/.album", "png"

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def grey:

image = Image.openhome + "/.album"

image = image.convert'L'

image.savehome + "/.album", "png"

You can grab the whole code here: Python CrunchBang Linux Pastebin.

The code in conky:

${execi 10 /home/pieter/.conky/conkymusic.py -g -s 75x75}
${image /home/pieter/.album -p 170,10 -s 75x75}

1 2	${execi 10 /home/pieter/.conky/conkymusic.py -g -s 75x75} ${image /home/pieter/.album -p 170,10 -s 75x75}

Works great here.