[英]Execute line of code when length of list changes Python
當列表長度大於一個時,我試圖顯示一段文本。
最初,當 streamlit 應用程序運行時,上傳的圖像列表中沒有文件,所以我不想顯示上傳的圖像文本,但是當有人上傳圖像時,我想顯示“上傳的圖像:”文本。
你如何監聽一個列表的長度並根據它的變化來執行代碼。
我的代碼:
uploaded_files = st.file_uploader(
"Choose samples to upload...", accept_multiple_files=True)
image_list = []
image_captions = []
#ignore this function
def add_border(input_image, border, color=0):
img = Image.open(input_image)
if isinstance(border, int) or isinstance(border, tuple):
bimg = ImageOps.expand(img, border=border, fill=color)
return bimg
else:
raise RuntimeError('Border is not an integer or tuple!')
for uploaded_file in uploaded_files:
image = add_border(uploaded_file, border=10, color='white')
image_list.append(image)
image_captions.append(uploaded_file.name)
if len(image_list) > 1:
st.write("Uploaded Images :")
st.image(image_list, width=125)
這是我的想法:由於image_list
將包含與 upload_files 中的圖像一樣多的圖像,因此您可以簡單地執行以下操作:
count = 0
for n, uploaded_file in enumerate(uploaded_files):
count += 1
# rest of ur code
print("Uploaded Images:")
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