Kalebu Jordan

Become a Pro Python Developer

Many of us struggle to focus now days, easily distracted by Social media and some sites on internet which dramatically affecting our productivity.

On this Tutorial you will learn and build your own website blocker to block certain selected sites that distract you during working hours .

Requirements

We are going to use time and Datetime Module only which comes by default with the Python Standard Library therefore you don’t need to install anything.

How do we block sites ?
On every operating system has a hosts file and it’s on this site where we are going to add list of website we want to block.

We will add websites URL which are mapped to localhost thus preventing from accessing the real site , for instance

Instead of adding 
'www.facebook.com'
we will add 
'127.0.0.1 www.facebook.com'

Therefore we need to add those site to host file during working hours and removing them immediately when it’s go home time .

if working_time:
  add mapped websites url to host file 
else:
  remove the website files from the host fle 

Location of hosts file

Host file that we need to edit are being stored on different path depending on Operating system you’re using

For those in Linux

Linux_host = "/etc/hosts"

For those in window

Window_host = r"C:\Windows\System32\drivers\etc\hosts"

Building our Website Blocker

Importing modules & pre configuring

import time
from datetime import datetime as dt

sites_to_block = [
    'www.facebook.com',  'facebook.com',  
    'www.youtube.com', 'youtube.com',
    'www.gmail.com', 'gmail.com'
]

Linux_host = '/etc/hosts'
Window_host = r"C:\Windows\System32\drivers\etc\hosts"
redirect = "127.0.0.1"

I have then made simple function to adding and removing mapped website url to host file depending on working time .

If your own Window change the default_hoster to Window_host

import time
from datetime import datetime as dt

sites_to_block = [
    'www.facebook.com',  'facebook.com',  
    'www.youtube.com', 'youtube.com',
    'www.gmail.com', 'gmail.com'
]

Linux_host = '/etc/hosts'
Window_host = r"C:\Windows\System32\drivers\etc\hosts"
default_hoster = Linux_host
redirect = "127.0.0.1"

def block_websites(start_hour , end_hour):
    while True:
        if dt(dt.now().year, dt.now().month, dt.now().day,start_hour)< dt.now() < dt(dt.now().year, dt.now().month, dt.now().day,end_hour): 
            print("Do the work ....")
            with open(default_hoster, 'r+') as hostfile:
                hosts = hostfile.read()
                for site in  sites_to_block:
                    if site not in hosts:
                       hostfile.write(redirect+' '+site+'\n')
        else:
            with open(default_hoster, 'r+') as hostfile:
                hosts = hostfile.readlines()
                hostfile.seek(0)
                for host in hosts:
                    if not any(site in host for site in sites_to_block):
                        hostfile.write(host)
                hostfile.truncate()
            print('Good Time')
        time.sleep(3)

if __name__ == '__main__':
    block_websites(9, 18)

The function receives two parameter , One is the starting time on which for testing I set as 9am and ending time for job which I primarly set 18.

Therefore you can adjust the testing to fit your own testing

Hope you find this post interesting , don’t forget to subscribe to get more tutorials like this. To get the full code it on My Github

In case of any suggestion or comment , drop it on the comment box and I will reply to you immediately.

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