From 995907273bdb7dfc344e9282e8ca72888a8708b2 Mon Sep 17 00:00:00 2001
From: hello <keye.myria@gmail.com>
Date: Tue, 11 Apr 2023 18:01:18 +0800
Subject: [PATCH 1/3] merge pdf

---
 merge.py | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 merge.py

diff --git a/merge.py b/merge.py
new file mode 100644
index 0000000..17d97d4
--- /dev/null
+++ b/merge.py
@@ -0,0 +1,45 @@
+#!/bin/env python3
+
+import os
+import datetime
+
+# pip3 install pypdf 
+from pypdf import PdfWriter, PdfReader, PageRange
+
+
+mfname= "book4_power_of_matrix"
+def main():
+
+    pdfwrtr = PdfWriter()
+    t_pages = 0
+    net_start = False
+    for r, dirs, files in os.walk("."):
+        del dirs[:]
+
+        for fitem in files:
+            fname, fext = os.path.splitext(fitem) 
+
+            if fext.lower() != ".pdf":
+                continue 
+            if not fitem.startswith("Book"):
+                continue
+            
+            pdfrd = PdfReader(fitem, 'rb')
+
+            meta = pdfrd.metadata 
+            
+            fname = fname.replace("Book4_", "")
+            fname = fname.split("__")[0]
+            fname = fname.replace("_", " ")
+            
+            pdfwrtr.append( pdfrd, fname  )
+            pdfwrtr.add_metadata(meta)
+    
+    now = datetime.datetime.now()
+    now_str = now.strftime("%Y.%m.%d_%H_%M_%S")
+    pdfwrtr.write("{mfname}.{nw}.pdf".format(mfname=mfname, nw=now_str))
+    pdfwrtr.close()
+
+
+if __name__ == '__main__':
+    main()

From df3d5eb8a9259f98f0e25e22a11f7a48e4853027 Mon Sep 17 00:00:00 2001
From: nono <no@no.com>
Date: Mon, 20 May 2024 15:55:10 +0800
Subject: [PATCH 2/3] nat sort

---
 merge.py | 34 ++++++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 8 deletions(-)

diff --git a/merge.py b/merge.py
index 17d97d4..a3cef79 100644
--- a/merge.py
+++ b/merge.py
@@ -3,8 +3,9 @@
 import os
 import datetime
 
-# pip3 install pypdf 
+# pip3 install pypdf natsort
 from pypdf import PdfWriter, PdfReader, PageRange
+from natsort import natsorted
 
 
 mfname= "book4_power_of_matrix"
@@ -13,6 +14,9 @@ def main():
     pdfwrtr = PdfWriter()
     t_pages = 0
     net_start = False
+    
+    pdfs = []
+    
     for r, dirs, files in os.walk("."):
         del dirs[:]
 
@@ -24,16 +28,30 @@ def main():
             if not fitem.startswith("Book"):
                 continue
             
-            pdfrd = PdfReader(fitem, 'rb')
-
-            meta = pdfrd.metadata 
-            
             fname = fname.replace("Book4_", "")
             fname = fname.split("__")[0]
             fname = fname.replace("_", " ")
-            
-            pdfwrtr.append( pdfrd, fname  )
-            pdfwrtr.add_metadata(meta)
+ 
+            pdfs.append(fitem)
+             
+
+    pwd = os.getcwd()
+    
+    pdfs = natsorted(pdfs)
+    
+    # print(" ----- ===== ", pdfs)
+    for fitem in pdfs:
+        # print(" ---- === --- ", fitem )
+        fname, fext = os.path.splitext(fitem) 
+
+        fname = fname.replace("Book4_", "")
+        fname = fname.split("__")[0]
+        fname = fname.replace("_", " ")
+        
+        pdfrd = PdfReader(os.path.join(pwd, fitem), 'rb')
+        meta = pdfrd.metadata 
+        pdfwrtr.append( pdfrd, fname  )
+        pdfwrtr.add_metadata(meta)        
     
     now = datetime.datetime.now()
     now_str = now.strftime("%Y.%m.%d_%H_%M_%S")

From a8267495cc7b9c529b549da34ccd178fb8f45137 Mon Sep 17 00:00:00 2001
From: nono <no@no.com>
Date: Mon, 20 May 2024 16:42:17 +0800
Subject: [PATCH 3/3] merge book

---
 merge.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/merge.py b/merge.py
index a3cef79..ed77664 100644
--- a/merge.py
+++ b/merge.py
@@ -27,10 +27,6 @@ def main():
                 continue 
             if not fitem.startswith("Book"):
                 continue
-            
-            fname = fname.replace("Book4_", "")
-            fname = fname.split("__")[0]
-            fname = fname.replace("_", " ")
  
             pdfs.append(fitem)
              
@@ -45,7 +41,7 @@ def main():
         fname, fext = os.path.splitext(fitem) 
 
         fname = fname.replace("Book4_", "")
-        fname = fname.split("__")[0]
+        fname = fname.rsplit("__", 2)[0]
         fname = fname.replace("_", " ")
         
         pdfrd = PdfReader(os.path.join(pwd, fitem), 'rb')