Streamlit
A faster way to build and share data apps

streamlit在幾分鐘內(nèi)就可以將數(shù)據(jù)腳本轉(zhuǎn)換為可共享的web應(yīng)用程序，并且是純python編程，無需前端經(jīng)驗(yàn)。

快速開始

streamlit非常容易上手，運(yùn)行demo只需2行代碼：

pip install streamlit
streamlit hello

運(yùn)行后會在系統(tǒng)默認(rèn)瀏覽器自動打開頁面：

動畫demo：

畫曲線圖demo：

可以訪問這里查看更多好玩兒的demo。

streamlit建立在三個(gè)簡單原則之上：

• 擁抱腳本

  streamlit api非常簡潔，正如前面所演示的，使用這些神奇簡單的api，只需幾行代碼就可以構(gòu)建應(yīng)用程序，并可以實(shí)時(shí)更新。

  

• 編織互動

  添加小部件只需聲明變量，無需編寫后端、定義路由、處理http請求、連接前端、編寫html、css、javascript等等

  

• 部署敏捷

  直接從 Streamlit 輕松共享、管理和部署您的應(yīng)用程序。完全免費(fèi)！

安裝

windows上建議使用anaconda管理python開發(fā)環(huán)境，如果嫌棄anaconda過于龐大，可以安裝miniconda。

將conda命令集成到windows terminal，可以參考這篇文章。

安裝anaconda或miniconda后，建立一個(gè)streamlit的開發(fā)環(huán)境：

? conda create -n streamlit-env python=3.9
Collecting package metadata (current_repodata.json): done
Solving environment: done==> WARNING: A newer version of conda exists. <==current version: 4.10.3latest version: 23.1.0Please update conda by running$ conda update -n base -c defaults conda## Package Plan ##environment location: C:\Users\yp.wang\anaconda3\envs\streamlit-envadded / updated specs:- python=3.9The following packages will be downloaded:package                    |            build---------------------------|-----------------ca-certificates-2023.01.10 |       haa95532_0         121 KB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/maincertifi-2022.12.7          |   py39haa95532_0         149 KB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/mainopenssl-1.1.1t             |       h2bbff1b_0         5.5 MB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/mainpip-22.3.1                 |   py39haa95532_0         2.7 MB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/mainpython-3.9.16              |       h6244533_0        19.4 MB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/mainsetuptools-65.6.3          |   py39haa95532_0         1.1 MB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/mainsqlite-3.40.1              |       h2bbff1b_0         889 KB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/maintzdata-2022g               |       h04d1e81_0         114 KB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/mainwheel-0.38.4               |   py39haa95532_0          83 KB  https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main------------------------------------------------------------Total:        30.1 MBThe following NEW packages will be INSTALLED:ca-certificates    anaconda/pkgs/main/win-64::ca-certificates-2023.01.10-haa95532_0certifi            anaconda/pkgs/main/win-64::certifi-2022.12.7-py39haa95532_0openssl            anaconda/pkgs/main/win-64::openssl-1.1.1t-h2bbff1b_0pip                anaconda/pkgs/main/win-64::pip-22.3.1-py39haa95532_0python             anaconda/pkgs/main/win-64::python-3.9.16-h6244533_0setuptools         anaconda/pkgs/main/win-64::setuptools-65.6.3-py39haa95532_0sqlite             anaconda/pkgs/main/win-64::sqlite-3.40.1-h2bbff1b_0tzdata             anaconda/pkgs/main/noarch::tzdata-2022g-h04d1e81_0vc                 anaconda/pkgs/main/win-64::vc-14.2-h21ff451_1vs2015_runtime     anaconda/pkgs/main/win-64::vs2015_runtime-14.27.29016-h5e58377_2wheel              anaconda/pkgs/main/win-64::wheel-0.38.4-py39haa95532_0wincertstore       anaconda/pkgs/main/win-64::wincertstore-0.2-py39haa95532_2Proceed ([y]/n)?Downloading and Extracting Packages
python-3.9.16        | 19.4 MB   | ############################################################################ | 100%
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Preparing transaction: done
Verifying transaction: done
Executing transaction: done
#
# To activate this environment, use
#
#     $ conda activate streamlit-env
#
# To deactivate an active environment, use
#
#     $ conda deactivate

激活環(huán)境，并安裝streamlit：

? conda activate streamlit-env(streamlit-env)
~ via 🐍 v3.9.16 via 🅒 streamlit-env
? pip install streamlit
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Building wheels for collected packages: validatorsBuilding wheel for validators (setup.py) ... doneCreated wheel for validators: filename=validators-0.20.0-py3-none-any.whl size=19591 sha256=6be2d241d0ee322ffc02b86a4fba6d6417764a38a60a55307246ac4c0b5db3a5Stored in directory: c:\users\yp.wang\appdata\local\pip\cache\wheels\93\fb\28\2cfa3bfb17c8e3bd3c1b22853cbfe4cabd25dbb42bb4afd517
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Installing collected packages: pytz, charset-normalizer, zipp, watchdog, urllib3, tzdata, typing-extensions, tornado, toolz, toml, smmap, six, semver, pyrsistent, pympler, pygments, protobuf, pillow, packaging, numpy, mdurl, MarkupSafe, idna, entrypoints, decorator, colorama, cachetools, blinker, attrs, validators, requests, pytz-deprecation-shim, python-dateutil, pyarrow, markdown-it-py, jsonschema, jinja2, importlib-metadata, gitdb, click, tzlocal, rich, pydeck, pandas, gitpython, altair, streamlit
Successfully installed MarkupSafe-2.1.2 altair-4.2.2 attrs-22.2.0 blinker-1.5 cachetools-5.3.0 charset-normalizer-3.0.1 click-8.1.3 colorama-0.4.6 decorator-5.1.1 entrypoints-0.4 gitdb-4.0.10 gitpython-3.1.31 idna-3.4 importlib-metadata-6.0.0 jinja2-3.1.2 jsonschema-4.17.3 markdown-it-py-2.2.0 mdurl-0.1.2 numpy-1.24.2 packaging-23.0 pandas-1.5.3 pillow-9.4.0 protobuf-3.20.3 pyarrow-11.0.0 pydeck-0.8.0 pygments-2.14.0 pympler-1.0.1 pyrsistent-0.19.3 python-dateutil-2.8.2 pytz-2022.7.1 pytz-deprecation-shim-0.1.0.post0 requests-2.28.2 rich-13.3.1 semver-2.13.0 six-1.16.0 smmap-5.0.0 streamlit-1.18.1 toml-0.10.2 toolz-0.12.0 tornado-6.2 typing-extensions-4.5.0 tzdata-2022.7 tzlocal-4.2 urllib3-1.26.14 validators-0.20.0 watchdog-2.2.1 zipp-3.14.0

streamlit的依賴項(xiàng)還是挺多的，這個(gè)環(huán)境幾乎涵蓋了用python做數(shù)據(jù)科學(xué)所需的包，所以除了學(xué)習(xí)streamlit外，其它跟數(shù)據(jù)科學(xué)相關(guān)的項(xiàng)目也可以用這個(gè)環(huán)境。

接下來，一行代碼把streamlit運(yùn)行起來：

(streamlit-env)
~ via 🐍 v3.9.16 via 🅒 streamlit-env
? streamlit helloWelcome to Streamlit. Check out our demo in your browser.Local URL: http://localhost:8501Network URL: http://192.168.20.81:8501Ready to create your own Python apps super quickly?Head over to https://docs.streamlit.ioMay you create awesome apps!

這樣就跑起來文章開頭那個(gè)demo了。

可以使用 ctrl + c 停止運(yùn)行程序，然后 conda deactivate 退出虛擬環(huán)境。