Switch from urllib to requests to improve reliability (#867)

* Switch from urllib to requests to improve reliability

* Keep ruff linter-specific

* update

* update

* update

appendix-E/01_main-chapter-code/previous_chapters.py

@@ -9,12 +9,12 @@
 
 import os
 from pathlib import Path
-import urllib
 import zipfile
 
 import matplotlib.pyplot as plt
 import numpy as np
 import pandas as pd
+import requests
 import tiktoken
 import torch
 import torch.nn as nn
@@ -367,9 +367,12 @@ def download_and_unzip_spam_data(url, zip_path, extracted_path, data_file_path):
         return
 
     # Downloading the file
-    with urllib.request.urlopen(url) as response:
-        with open(zip_path, "wb") as out_file:
-            out_file.write(response.read())
+    response = requests.get(url, stream=True, timeout=60)
+    response.raise_for_status()
+    with open(zip_path, "wb") as out_file:
+        for chunk in response.iter_content(chunk_size=8192):
+            if chunk:
+                out_file.write(chunk)
 
     # Unzipping the file
     with zipfile.ZipFile(zip_path, "r") as zip_ref: