fix error

play_with_os/test.py

@@ -0,0 +1,20 @@
+import os
+
+def show_all_files_directory(dir_path = str, search_endung = False, search_string = False):
+    li_all = []
+    for root_folder, dirs, files in os.walk(dir_path, topdown=False):       
+        for name in files: 
+            FullPATH = str(os.path.join(root_folder, name))
+            if not search_endung is False:
+                if FullPATH.endswith(search_endung):
+                    li_all.append(FullPATH)
+            elif not search_string is False:
+                if not FullPATH.find(search_string) ==  -1:
+                     li_all.append(FullPATH)
+            else:
+                li_all.append(FullPATH)        
+    return li_all
+
+    
+
+print(show_all_files_directory(dir_path="/home/jonnybravo/Downloads", search_string=".txt"))