Try separate manual as data

modules/app_change.py

@@ -5,7 +5,7 @@
 )
 import nm
 from utils import attempt_float, read_markdown_file
-from modules.manual import man_app
+from modules.manual import read_man # man_app
 
 # Change App
 class AppChange(ft.UserControl):
@@ -35,7 +35,8 @@ def build(self):
                  self.btn,
                  self.output_text_field,
                  ft.Text("How to use", theme_style=ft.TextThemeStyle.TITLE_MEDIUM), 
-                 ft.Markdown(man_app["change"], selectable=True)
+                 # ft.Markdown(man_app["change"], selectable=True),
+                 ft.Markdown(read_man("change_app_man.md"), selectable=True)
                  ]
             )
         )

modules/app_spine_ht_loss.py

@@ -5,7 +5,7 @@
 )
 import nm
 from utils import parse_str_to_num_or_list, read_markdown_file
-from modules.manual import man_app
+from modules.manual import read_man # man_app
 
 # Spine Ht Loss App
 class AppSpineHtLoss(ft.UserControl):
@@ -36,7 +36,8 @@ def build(self):
                  self.btn,
                  self.output_text_field,
                  ft.Text("How to use", theme_style=ft.TextThemeStyle.TITLE_MEDIUM), 
-                 ft.Markdown(man_app["spine_ht_loss"], selectable=True)
+                 # ft.Markdown(man_app["spine_ht_loss"], selectable=True)
+                 ft.Markdown(read_man("spine_ht_loss_man.md"), selectable=True)
                  ]
             )
         )

modules/manual.py

@@ -1,10 +1,32 @@
-man_app={
-    "change": f"""- Input current value as number (e.g. 2)
-- Input previous value as number (e.g. 1)
-- % change = (current - previous) * 100 / previous""",
-    "spine_ht_loss": f"""- Input height in centimeter (e.g. 10)
-- Comma-separated value to calculate mean (e.g. 10, 12)"""
-}
+# man_app={
+#     "change": f"""- Input current value as number (e.g. 2)
+# - Input previous value as number (e.g. 1)
+# - % change = (current - previous) * 100 / previous""",
+#     "spine_ht_loss": f"""- Input height in centimeter (e.g. 10)
+# - Comma-separated value to calculate mean (e.g. 10, 12)"""
+# }
 
+def read_man(man_name):
+    """Read Markdown from `man/`"""
+    # Technique from this https://py-pkgs.org/04-package-structure#including-non-code-files-in-a-package
+    from importlib import resources 
+    with resources.path("modules.man", man_name) as file_path:
+        markdown_content = read_markdown_file(file_path)
+    return markdown_content
+
+
+def read_markdown_file(file_path):
+    from pathlib import Path
+    file_path = Path(file_path)
+    try:
+        # Open the markdown file in read mode
+        with open(file_path, 'r', encoding='utf-8') as file:
+            # Read the entire file content into a string
+            markdown_content = file.read()
+            return markdown_content
+    except FileNotFoundError:
+        print(f"The file {file_path} was not found.")
+    except Exception as e:
+        print(f"An error occurred: {e}")