Add ch13 section 5 exercise 1 solution

somacdivad · somacdivad · commit 56b6289f570e · 2020-01-13T22:46:07.000-06:00
diff --git a/ch13-interact-with-pdf-files/5-encrypting-and-decrypting-pdfs.py b/ch13-interact-with-pdf-files/5-encrypting-and-decrypting-pdfs.py
@@ -0,0 +1,29 @@
+# 13.5 - Encrypting and Decrypting PDFs
+# Solutions to review exercises
+
+# ***********
+# Exercise 1
+#
+# In the Chapter 13 Practice Files folder there is a PDF file called
+# `top_secret.pdf`. Encrypt the file with the user password
+# `Unguessable`. Save the encrypted file as in your home directory as
+# `top_secret_encrypted.pdf`.
+# ***********
+
+from pathlib import Path
+
+from PyPDF2 import PdfFileReader, PdfFileWriter
+
+
+pdf_path = Path.home() / "python-basics-exercises/" \
+    "ch13-interact-with-pdf-files/practice_files/top_secret.pdf"
+
+pdf_reader = PdfFileReader(str(pdf_path))
+pdf_writer = PdfFileWriter()
+
+pdf_writer.appendPagesFromReader(pdf_reader)
+pdf_writer.encrypt(user_pwd="Unguessable")
+
+output_path = Path.home() / "top_secret_encrypted.pdf"
+with output_path.open(mode="wb") as output_file:
+    pdf_writer.write(output_file)
