add pdf compressor tutorial

Author: x4nth055

Diff for: README.md

@@ -97,6 +97,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Extract Text from Images in PDF Files with Python](https://www.thepythoncode.com/article/extract-text-from-images-or-scanned-pdf-python). ([code](handling-pdf-files/pdf-ocr))
     - [How to Convert PDF to Docx in Python](https://www.thepythoncode.com/article/convert-pdf-files-to-docx-in-python). ([code](handling-pdf-files/convert-pdf-to-docx))
     - [How to Convert PDF to Images in Python](https://www.thepythoncode.com/article/convert-pdf-files-to-images-in-python). ([code](handling-pdf-files/convert-pdf-to-image))
+    - [How to Compress PDF Files in Python](https://www.thepythoncode.com/article/compress-pdf-files-in-python). ([code](handling-pdf-files/pdf-compressor))
 
 
 - ### [Web Scraping](https://www.thepythoncode.com/topic/web-scraping)

Diff for: handling-pdf-files/pdf-compressor/README.md

@@ -0,0 +1,8 @@
+# [How to Compress PDF Files in Python](https://www.thepythoncode.com/article/compress-pdf-files-in-python)
+To run this:
+- `pip3 install -r requirements.txt`
+- To compress `bert-paper.pdf` file:
+    ```
+    $ python pdf_compressor.py bert-paper.pdf bert-paper-min.pdf
+    ```
+    This will spawn a new compressed PDF file under the name `bert-paper-min.pdf`.

Diff for: handling-pdf-files/pdf-compressor/bert-paper.pdf

@@ -0,0 +1,58 @@
+# Import Libraries
+import os
+import sys
+from PDFNetPython3.PDFNetPython import PDFDoc, Optimizer, SDFDoc, PDFNet
+
+
+def get_size_format(b, factor=1024, suffix="B"):
+    """
+    Scale bytes to its proper byte format
+    e.g:
+        1253656 => '1.20MB'
+        1253656678 => '1.17GB'
+    """
+    for unit in ["", "K", "M", "G", "T", "P", "E", "Z"]:
+        if b < factor:
+            return f"{b:.2f}{unit}{suffix}"
+        b /= factor
+    return f"{b:.2f}Y{suffix}"
+
+
+def compress_file(input_file: str, output_file: str):
+    """Compress PDF file"""
+    if not output_file:
+        output_file = input_file
+    initial_size = os.path.getsize(input_file)
+    try:
+        # Initialize the library
+        PDFNet.Initialize()
+        doc = PDFDoc(input_file)
+        # Optimize PDF with the default settings
+        doc.InitSecurityHandler()
+        # Reduce PDF size by removing redundant information and compressing data streams
+        Optimizer.Optimize(doc)
+        doc.Save(output_file, SDFDoc.e_linearized)
+        doc.Close()
+    except Exception as e:
+        print("Error compress_file=", e)
+        doc.Close()
+        return False
+    compressed_size = os.path.getsize(output_file)
+    ratio = 1 - (compressed_size / initial_size)
+    summary = {
+        "Input File": input_file, "Initial Size": get_size_format(initial_size),
+        "Output File": output_file, f"Compressed Size": get_size_format(compressed_size),
+        "Compression Ratio": "{0:.3%}.".format(ratio)
+    }
+    # Printing Summary
+    print("## Summary ########################################################")
+    print("\n".join("{}:{}".format(i, j) for i, j in summary.items()))
+    print("###################################################################")
+    return True
+
+
+if __name__ == "__main__":
+    # Parsing command line arguments entered by user
+    input_file = sys.argv[1]
+    output_file = sys.argv[2]
+    compress_file(input_file, output_file)

Diff for: handling-pdf-files/pdf-compressor/pdf_compressor.py

@@ -0,0 +1 @@
+PDFNetPython3==8.1.0