プレースホルダーの処理を変更

app.py

@@ -27,8 +27,10 @@ def main():
         value=30,
     )
 
+    status_area = st.empty()
+
     if st.button("処理の実行"):
-        x = bul_image_maker(height, width, times)
+        x = bul_image_maker(height, width, times, status_area)
         st.image(x)
 
 

bul_image_maker.py

@@ -5,7 +5,7 @@ import numpy as np
 import streamlit as st
 
 
-def bul_image_maker(height: int, width: int, times: int) -> None:
+def bul_image_maker(height: int, width: int, times: int, status_area) -> None:
 
     """
     ランダム + 累積和で画像を作って表示する
@@ -23,8 +23,6 @@ def bul_image_maker(height: int, width: int, times: int) -> None:
 
     im = np.zeros((height, width))
 
-    status_area = st.empty()
-
     for time in range(times):
 
         status_area.write(f"{time}/{times}")