Explanation

• Would be good to have clearer distinction of some well defined errors (that we want to detect) from the generic PdfReadError:
  • WrongPasswordError
  • FileNotDecryptedError
  • EmptyFileError
• This makes it cleaner for error catching and handling (instead of inspecting the args within the error message)

Code Example

from PyPDF2 import PdfReader, PdfWriter
from PyPDF2.errors import FileNotDecryptedError

filepath = "encrypted.pdf"
try:
    PdfReader(filepath)
except FileNotDecryptedError:
    # do something...specifically for this error!
    # and not have to dig through the args of the error to pick out this specific error...