streamlit

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  • 每个页面都是一个应用 （默认30s）
  • 当前目录下pages 为各个页面应用
  • GET请求使用 streamlit.query_params.get(‘id’)
  • 全页面是按照 uploaded_file = st.file_uploader(“选择一张图片”, type=[“png”, “jpg”, “jpeg”])然后再判断uploaded_file
uploaded_file = st.file_uploader("选择一张图片", type=["png", "jpg", "jpeg"])
if uploaded_file is not None:
    image = Image.open(uploaded_file)
    st.image(image, caption="上传的图片", use_column_width=True)

    save_path = os.path.join(UPLOAD_DIR, uploaded_file.name)
    with open(save_path, "wb") as f:
        f.write(uploaded_file.getbuffer())
    st.success(f"图片已保存到：{save_path}")
import streamlit as st
from streamlit_pdf_viewer import pdf_viewer

st.header("Input info")

sx=st.text_input("TEXT")

user_age = st.slider("请选择您的年龄", 0, 100, 25)
tx=st.text_area("sqqqq")

btn_clicked = st.button("点击这里")

p=st.progress(0)
p.progress(user_age)
# 设置值

if btn_clicked:
    st.write("mmmk",sx)
    st.write("AGE",user_age)
    st.write("Click")
    st.write(p)


c=st.checkbox("同意吗")
st.write(c)

r=st.radio("选什么",{'axxxxxxx':"a",'bxxxx':"b",'c':"zzzzzzz"})
st.write("答案",r)

s=st.selectbox("选什么",['a',1,3,4,5])
st.write(s)

m=st.multiselect("选什么",['a',1,3,4,5])
st.write(m)

st.image("./a.jpg")

uploaded_file = st.file_uploader("选择一张图片", type=["png", "jpg", "jpeg"])

if uploaded_file is not None:
    st.image(uploaded_file)

pv=st.file_uploader("上传PDF",type=['pdf'])
if pv is not None:
    pdf_viewer(pv.read(),width=700,height=1000)

lst = ["苹果", "香蕉", "橙子"]
st.write(lst)                 # 默认 → ['苹果', '香蕉', '橙子']
st.code(lst, language="json") # 带灰底，更像代码块

st.markdown("\n".join(f"- {item}" for item in lst))
# //使用Markdown 实现显示列表进度



# 自由展示 columns
# 原始列表
fruit_list = [
    {"name": "苹果", "price": 5.8,  "pic": "apple"},
    {"name": "香蕉", "price": 3.2, "pic": "banana"},
    {"name": "橙子", "price": 4.5, "pic": "orange"},
]

# 用 columns 做“网格”：每行 3 张卡片
cols = st.columns(3)
for idx, fruit in enumerate(fruit_list):
    col = cols[idx % 3]   # 循环使用 3 列
    with col:
        # 卡片容器
        with st.container(border=True):
            # 1. 图（Unsplash 随机水果图）
            img_url = f"https://source.unsplash.com/200x200/?fruit,{fruit['pic']}"
            st.image(img_url, use_column_width=True)

            # 2. 名称 + 价格
            st.markdown(f"**{fruit['name']}**")
            st.caption(f"¥{fruit['price']}/斤")

            # 3. 数量选择
            qty = st.number_input("斤数", min_value=0, max_value=20, step=1, key=f"qty_{idx}")

            # 4. 折叠详情
            with st.expander("查看详情"):
                st.write("产地：南方优质果园")
                st.write("甜度：★★★★☆")

            # 5. 购买按钮
            if st.button("加入购物车", key=f"buy_{idx}", type="primary"):
                if qty == 0:
                    st.warning("请先选择数量！")
                else:
                    st.success(f"已添加 {qty} 斤 {fruit['name']} 到购物车！")

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