Add thread for multiple image

src/pixiv/pixiv_api.py

@@ -1,5 +1,14 @@
+import os
+import threading
+from queue import Queue
+from threading import Thread
+from typing import List, Tuple, Union
+
 import pixivpy3
 
+cpu_count = os.cpu_count()
+max_thread_num = cpu_count * 4 if cpu_count is not None else 4
+
 
 def dowload_pixiv_images(
     illust_id: int,
@@ -16,13 +25,52 @@ def dowload_pixiv_images(
     pages = illust["meta_pages"]
     if len(pages) > 0:
         print(f"Dowloading mutiple images to {dest_folder} ({len(pages)})")
+        if max_thread_num > len(pages):
+            num_threads = len(pages)
+        else:
+            num_threads = max_thread_num
+            
+        print(f"Starting {num_threads} thread(s)")
+        workers: List[Thread] = []
+        q: Queue[Union[Tuple[str, str, pixivpy3.AppPixivAPI], None]] = Queue()
+        for i in range(num_threads):
+            worker = Thread(target=download_thread, args=(q,))
+            worker.setDaemon(True)
+            worker.start()
+            workers.append(worker)
+
         for page in pages:
             url = page["image_urls"]["original"]
-            api.download(url=url, path=dest_folder)
+            q.put((url, dest_folder, api))
+
+        q.join()
+
+        # Send end signal to all threads
+        for i in range(num_threads):
+            q.put(None)
+        # Wait for them to finish
+        for worker in workers:
+            worker.join()
+
     else:
         print(f"Dowloading single image to {dest_folder}")
         api.download(
             url=illust["meta_single_page"]["original_image_url"], path=dest_folder
         )
-    print("Down4load finished !")
+    print("Download finished !")
     return illust["title"]
+
+
+def download_thread(q: Queue[Union[Tuple[str, str, pixivpy3.AppPixivAPI], None]]):
+    thread_name = threading.currentThread().getName()
+    while True:
+        data = q.get()
+        if data is None:
+            print(f"[{thread_name}] - Bye bye")
+            q.task_done()
+            break
+        (url, dest_folder, api) = data
+        print(f"[{thread_name}] - Downloading {url}...")
+        api.download(url=url, path=dest_folder)
+        print(f"[{thread_name}] - ... Done")
+        q.task_done()