Script to add bookmarks to a PDF (Need review and suggestions)

Hello guys,

So i made this little script that adds bookmarks to PDFs using Py2PDF module. It's not really a full automation of the process of adding bookmarks since you still have to manually add the parent bookmark and add the bookmarks (Chapters + their respectives pages) into a dictionnary. Once the dictionnary is made, the bookmarks are added with a for loop that uses the addBookmark method in a new output PDF file.

from PyPDF2 import PdfFileWriter, PdfFileReader

pdf_object = open("pdf_without_bookmarks.pdf","rb") #rb stands for read binary
output = PdfFileWriter()
input = PdfFileReader(pdf_object)

input_numpages = input.getNumPages()

#basically just copy the input file
for i in range(input_numpages):
output.addPage(input.getPage(i)) #insert page in the output file

parent_1 = output.addBookmark('Parent 2', page of parent 2) # add parent bookmark
bookmarks_dic_1 = {
"Chapter 1": page of Chapter 1,
"Chapter 2": page of Chapter 2,
"Chapter n": page of Chapter n,
}



for k, v in bookmarks_dic_1.items():

output.addBookmark(k ,v +1,parent_1 ) #add child bookmarks


parent_2 = output.addBookmark('Parent 2', page of parent 2)
bookmarks_dic_2 = {
"Chapter 1": page of Chapter 1,
"Chapter 2": page of Chapter 2,
"Chapter n": page of Chapter n,
}

for k, v in bookmarks_dic_2.items():

output.addBookmark(k ,v +1,parent_2 ) #add child bookmarks

outputstream = open('pdf_with_bookmarks.pdf','wb') #creating result
output.write(outputstream) #writing to result pdf
outputstream.close() #closing result


Initially, when i started working on this, i wanted to scrape Chapter and Page information from PDF filesummary, but i realized it was too ambitious and that it requires to know how to use regex (Am i right?).

I also want to know if there's a way to put all this in one loop, instead of having to create a new loop for each parent. But i don't know how. Like is there such thing as a dictionnary with more than 1 value? The Parent will be the key and the values Name of chapter and Page of chapter. A kind of a double dictionnary. Something like this :

summary_dictionnary = {"Parent 1":{"Chapter 1": Page, "Chapter n": Page}, "Parent n": {"Chapter 1": Page,"Chapter n":Page}}

Is that even possible?
I'm also posting here to have a general review on my code, what do you guys would change?

Big thanks in advance

/r/Python
https://redd.it/7tih40

Full course available
https://www.youtube.com/watch?v=CfXvjzlzabI

/r/django
https://redd.it/hkoljd

Simple syntax question- how to drop one table in SQL Alchemy / Flask?


The Flask documentation seems to only discuss how to drop ALL the tables:
https://flask-sqlalchemy.palletsprojects.com/en/2.x/binds/#creating-and-dropping-tables

I don't know how to interpret this, https://docs.sqlalchemy.org/en/14/core/metadata.html#sqlalchemy.schema.Table.drop. I'm not sure if it would apply to working in Flask.

All the online answers regarding deleting one table in SQL Alchemy discuss it as engine, not, as one stackoverflow user says, a "Flask-SQLAlchemy extension object".



I need to drop a table every time the app runs because the app automatically populates this table with data. If it tries to populate a populated table, it will get a "UNIQUE" error.

On my init.py I have:
~~~
from flasksite.models import Styletable
db = SQLAlchemy(app)
db.dropall()
db.createall()
Styletable.createtable()
~~~
This works great to populate the data. But, it drops all the data from all the tables. That's not good.

I wish I could just do something like

db.drop(Styletable)

or

db.Styletable.drop()

on my models.py I have:
~~~~
class Styletable(db.Model):
id = db.Column(db.Integer, primarykey=True)
stylename = db.Column(db.String(100), primarykey=True, nullable= False)

def createtable():
a = Styletable()
b = Styletable()
c = Styletable()
a.stylename = "essay"


/r/flask
https://redd.it/pqmj4g

My beginning attempt at networking device backups

This is my beginning attempt at making a networking device backup script. This script uses netmiko for communicating with the devices. I would love feed back.

Edit: Here is a link to the code in better formatting https://pastebin.com/V1tG8hCM

from netmiko import ConnectHandler
from datetime import datetime
from secrects import switchuser, switchpassword
import os
import json


devicelist = '/home/vetadmin/scripts/switch.json'
#skippagedisplay = "skip-page-display"
#pagedisplay = "page-display"
showrun = "show run"
#showhostname = "show run | inc hostname"
date = datetime.now().strftime("%Y%m%d")
s = 0
d = 0

#Creating the log file
logpath = ("/home/vetadmin/scripts/logging/")
if not os.path.exists(logpath):
os.makedirs(logpath)
l= open ("/home/vetadmin/scripts/logging/switchbackup.log", "a")
l.write("\n" + date + "\n")

#Opening the switch.json file that has all the switch ip information
with open(devicelist)

/r/Python
https://redd.it/q3xbsn

How to Create An Twitterbot with simpletwitter

Github Repository: [https://github.com/pravee42/simpletwitter](https://github.com/pravee42/simpletwitter)

```
from simpletwitter import SimpleTwitter

email = "Twitter_User_Email_Address"
password = "Twitter_Password"
user_name = "Abipravi1"
#here i have entered my twitter username but you need to enter your's in this case

no_of_tweets = 10 #this value is necessary how many no of tweets you want to perform operation

bot = SimpleTwitter(email, password, no_of_tweets, user_name)
#Creating Instance

hashtags = ['#abipravi', #pythonmodule', '#twitter_bot']
tweetmessage = "My first tweet by simple twitter"
bot.login() # to login into the account

bot.like_tweet(hashtags) # like the tweet

bot.unlike_liked_tweets(5) # unlike the liked tweet

bot.tweet(tweetmessage) # put some tweet



/r/Python
https://redd.it/r7mtzy

How do I create multiple temporary image files and serve them?

I want to serve images on my server with the user's username watermarked on them.

So, the path I have decided to take (recommend me a better one) is creating a temporary file, watermarking the original image in the backend, saving that and then linking to the temp file.

​

This is what I am trying:

​

if file.extension() in '.jpeg', '.jpg', '.png','.JPEG', '.JPG', '.PNG':
print(file.file.url)

img = Image.open(file.file.path)
draw = ImageDraw.Draw(img)

#Creating text and font object
text = "tenth

/r/djangolearning
https://redd.it/skeu09

Arguments against separating test from src in a python package?

The Python Packaging Authority recommends separating the test directory from the src (source code) directory in a Python application:

https://packaging.python.org/en/latest/tutorials/packaging-projects/#creating-the-package-files


Personally, I have always preferred this approach of keeping tests outside the package rather than mixing them with the source code (tests in package).

However, in the interest of expanding my perspective and learning something new, I am open to exploring alternative viewpoints. What are the main arguments for including tests within the package itself?

Image taken from https:\/\/blog.ionelmc.ro\/2014\/05\/25\/python-packaging\/

/r/Python
https://redd.it/11zjjzy

Have started the django doc again, and got stuck.

At this part of "Writing your first app", I try to type in "py manage.py startapp polls" and it shows "ModuleNotFoundError: No module named 'polls". Why is that?

/r/djangolearning
https://redd.it/1grq58d