Add ch13 section 4 exercise 1 solution

somacdivad · somacdivad · commit 6ccaa872711e · 2020-01-13T21:35:32.000-06:00
diff --git a/ch13-interact-with-pdf-files/4-rotating-and-cropping-pdf-pages.py b/ch13-interact-with-pdf-files/4-rotating-and-cropping-pdf-pages.py
@@ -1,2 +1,30 @@
 # 13.4 - Rotating and Cropping PDF pages
 # Solutions to review exercises
+
+# ***********
+# Exercise 1
+#
+# In the Chapter 13 Practice Files folder there is a PDF called
+# `split_and_rotate.pdf`. Create a new PDF called `rotated.pdf` in your
+# home directory containing the pages of `split_and_rotate.pdf` rotated
+# counter-clockwise 90 degrees.
+# ***********
+
+from pathlib import Path 
+
+from PyPDF2 import PdfFileReader, PdfFileWriter
+
+
+pdf_path = Path.home() / "github/realpython/python-basics-exercises/" \
+    "ch13-interact-with-pdf-files/practice_files/split_and_rotate.pdf"
+
+pdf_reader = PdfFileReader(str(pdf_path))
+pdf_writer = PdfFileWriter()
+
+for page in pdf_reader.pages:
+    rotated_page = page.rotateCounterClockwise(90)
+    pdf_writer.addPage(rotated_page)
+
+output_path = Path.home() / "rotated.pdf"
+with output_path.open(mode="wb") as output_file:
+    pdf_writer.write(output_file)
