Snowflake Python Demos APIยถ

Snowflake Python ๋ฐ๋ชจ ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ(snowflake.demos)๋Š” Snowflake Notebooks ์— ๋Œ€ํ•œ ๋ฐ๋ชจ๋ฅผ ๋น ๋ฅด๊ฒŒ ์Šค์บํด๋”ฉํ•˜์—ฌ Snowflake Notebooks ๋ฅผ ๊ฐ„ํŽธํ•˜๊ฒŒ ์‹œ์ž‘ํ•  ์ˆ˜ ์žˆ๋„๋ก ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค, ์Šคํ‚ค๋งˆ, ์—ญํ• , ๊ถŒํ•œ, ๋ฐ์ดํ„ฐ ์„ธํŠธ ์•ก์„ธ์Šค ๊ตฌ์„ฑ๊ณผ ๊ฐ™์€ ํ™˜๊ฒฝ ์„ค์ • ์ž‘์—…์„ ์ž๋™ํ™”ํ•˜์—ฌ ๋„์™€์ค๋‹ˆ๋‹ค.

์ด ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์‚ฌ์šฉํ•˜๋ฉด ์ด๋Ÿฌํ•œ ์ž‘์—…์„ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

  • Snowflake ํ™˜๊ฒฝ์—์„œ Snowflake Notebooks ๋ฐ๋ชจ๋ฅผ ๋กœ๋”ฉํ•˜๊ณ  ์„ค์ •ํ•ฉ๋‹ˆ๋‹ค.

  • ๋Œ€ํ™”ํ˜• ๋…ธํŠธ๋ถ์„ ๋‹จ๊ณ„๋ณ„๋กœ ์‚ดํŽด๋ณด๋ฉฐ ์ง์ ‘ ์ฒดํ—˜ํ•ด ๋ณด์‹ญ์‹œ์˜ค.

  • ์ž‘์—…์ด ๋๋‚˜๋ฉด ๋ฆฌ์†Œ์Šค๋ฅผ ์‰ฝ๊ฒŒ ๋ถ„๋ฆฌํ•˜์‹ญ์‹œ์˜ค.

์ „์ œ ์กฐ๊ฑดยถ

Snowflake Demos API ๋ฅผ ์‹œ์ž‘ํ•˜๊ธฐ ์ „์— ๋‹ค์Œ ๋‹จ๊ณ„๋ฅผ ์™„๋ฃŒํ•˜์‹ญ์‹œ์˜ค.

  1. ์ง€์›๋˜๋Š” Python ๋ฒ„์ „ ์ค‘ ํ•˜๋‚˜๋ฅผ ์„ค์น˜ํ–ˆ๋Š”์ง€ ํ™•์ธํ•ฉ๋‹ˆ๋‹ค.

    • 3.9

    • 3.10

    • 3.11

    • 3.12

  2. Snowflake Demos ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ ์„ค์น˜ํ•˜๊ธฐ.

  3. ๊ธฐ๋ณธ Snowflake ์—ฐ๊ฒฐ ์„ค์ •ํ•˜๊ธฐ.

  4. snowflake.demos ๊ฐ€์ ธ์˜ค๊ธฐ.

Snowflake Demos ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ ์„ค์น˜ํ•˜๊ธฐยถ

Snowflake Demos ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์„ค์น˜ํ•˜์—ฌ conda ๋˜๋Š” ๊ฐ€์ƒ ํ™˜๊ฒฝ์—์„œ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์„ค์ •ํ•˜๋ ค๋ฉด ๋‹ค์Œ ๋‹จ๊ณ„๋ฅผ ๋”ฐ๋ฅด์‹ญ์‹œ์˜ค.

  1. Python ํ™˜๊ฒฝ์„ ํ™œ์„ฑํ™”ํ•ฉ๋‹ˆ๋‹ค.

  2. ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์„ค์น˜ํ•˜๋ ค๋ฉด ๋‹ค์Œ pip install ๋ช…๋ น์„ ์‹คํ–‰ํ•ฉ๋‹ˆ๋‹ค.

    pip install snowflake.demos
    
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๊ธฐ๋ณธ Snowflake ์—ฐ๊ฒฐ ์„ค์ •ํ•˜๊ธฐยถ

Snowflake Demos API ๋Š” Snowflake Python Connector ์— ๋Œ€ํ•œ ๊ธฐ๋ณธ ์—ฐ๊ฒฐ์„ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค. ์ด ์—ฐ๊ฒฐ์„ ๊ตฌ์„ฑํ•˜๋ ค๋ฉด ๊ธฐ๋ณธ ์—ฐ๊ฒฐ ์„ค์ •ํ•˜๊ธฐ ์˜ ์ง€์นจ์„ ๋”ฐ๋ฅด์‹ญ์‹œ์˜ค.

์˜ˆ๋ฅผ ๋“ค์–ด ๋ช…๋ช…๋œ ์—ฐ๊ฒฐ์„ Snowflake config.toml ํŒŒ์ผ์—์„œ ๊ธฐ๋ณธ ์—ฐ๊ฒฐ๋กœ ์ง€์ •ํ•˜๋ ค๋ฉด ๋‹ค์Œ๊ณผ ๊ฐ™์ด config.toml ํŒŒ์ผ์— ๊ธฐ๋ณธ ์—ฐ๊ฒฐ ์ด๋ฆ„์„ ์ถ”๊ฐ€ํ•ฉ๋‹ˆ๋‹ค.

default_connection_name = '<connection_name>'
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TOML ๊ตฌ์„ฑ ํŒŒ์ผ์—์„œ ์—ฐ๊ฒฐ ์ •์˜๋ฅผ ์ง€์ •ํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•œ ์ž์„ธํ•œ ๋‚ด์šฉ์€ connections.toml ํŒŒ์ผ์„ ์‚ฌ์šฉํ•˜์—ฌ ์—ฐ๊ฒฐํ•˜๊ธฐ ์„น์…˜์„ ์ฐธ์กฐํ•˜์‹ญ์‹œ์˜ค.

snowflake.demos ๊ฐ€์ ธ์˜ค๊ธฐยถ

ํ„ฐ๋ฏธ๋„์—์„œ ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์‚ฌ์šฉํ•˜๋ ค๋ฉด ํ‘œ์ค€ Python REPL ๊ณผ ๊ฐ™์€ ๋Œ€ํ™”ํ˜• ์…ธ์„ ์—ด๋ฉด ๋ฉ๋‹ˆ๋‹ค.

  1. ๋‹ค์Œ ๋ช…๋ น์„ ์‹คํ–‰ํ•ฉ๋‹ˆ๋‹ค(Python ํ™˜๊ฒฝ์— ๋”ฐ๋ผ ๋‹ค๋ฅผ ์ˆ˜ ์žˆ์Œ).

    python3
    
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  2. REPL ์„ธ์…˜์—์„œ ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ์™€ ๊ด€๋ จ ํ•จ์ˆ˜๋ฅผ ๊ฐ€์ ธ์˜ค๋ ค๋ฉด ๋‹ค์Œ ์ฝ”๋“œ๋ฅผ ์‹คํ–‰ํ•ฉ๋‹ˆ๋‹ค.

    from snowflake.demos import help, load_demo, teardown
    
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์‚ฌ์šฉ ๊ฐ€๋Šฅํ•œ ๋ฐ๋ชจ ๋ชฉ๋ก ํ‘œ์‹œยถ

๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ๊ฐ€์ ธ์˜จ ํ›„ help() ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋กœ๋”ฉํ•  ์ˆ˜ ์žˆ๋Š” ์‚ฌ์šฉ ๊ฐ€๋Šฅํ•œ ๋ฐ๋ชจ ๋ชฉ๋ก์„ ํ™•์ธํ•˜๊ณ  ํƒ์ƒ‰์„ ์‹œ์ž‘ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด ํ•จ์ˆ˜๋Š” ๋‹ค์Œ ์—ด์ด ํฌํ•จ๋œ ํ…Œ์ด๋ธ”์„ ๋ฐ˜ํ™˜ํ•ฉ๋‹ˆ๋‹ค.

  • demo_name: ๋ฐ๋ชจ ์ด๋ฆ„์„ ๋‚˜ํƒ€๋‚ด๋Š” ๋Œ€์‹œ๋กœ ๊ตฌ๋ถ„๋œ ๋ฌธ์ž์—ด์ž…๋‹ˆ๋‹ค.

  • title: ์‚ฌ๋žŒ์ด ์ฝ์„ ์ˆ˜ ์žˆ๋Š” ๋ฐ๋ชจ ์ด๋ฆ„ ์ œ๋ชฉ์ž…๋‹ˆ๋‹ค.

  • num_steps: ๋ฐ๋ชจ์˜ ๋‹จ๊ณ„ ์ˆ˜์ž…๋‹ˆ๋‹ค.

ํ˜„์žฌ ์‚ฌ์šฉ ๊ฐ€๋Šฅํ•œ ๋ฐ๋ชจ ๋ชฉ๋กยถ

์ฐธ๊ณ 

๋‹ค์Œ ๋‚ด์šฉ์€ Snowflake์—์„œ ์ง€์›๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ๋ชจ๋“  ์ฝ”๋“œ๋Š” โ€œ์žˆ๋Š” ๊ทธ๋Œ€๋กœโ€ ์ œ๊ณต๋˜๋ฉฐ ๋ณด์ฆ๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

Snowflake Demos API ๋Š” ํ˜„์žฌ ๋‹ค์Œ ๋ฐ๋ชจ ๋ชฉ๋ก๊ณผ ํ•จ๊ป˜ ์ž‘๋™ํ•ฉ๋‹ˆ๋‹ค.

demo_name

title

num_steps

analysis-churn-notebooks

Snowflake Notebooks๋ฅผ ์‚ฌ์šฉํ•œ ๋ฐ์ดํ„ฐ ๋ถ„์„ ๋ฐ ์ดํƒˆ ์˜ˆ์ธก

2

analytics-cortex

Snowflake Cortex๋ฅผ ์‚ฌ์šฉํ•œ ๊ณ ๊ฐ ๋ฆฌ๋ทฐ ๋ถ„์„

1

anthropic-cortex

Snowflake Cortex์—์„œ Anthropic ์‹œ์ž‘ํ•˜๊ธฐ

1

external-access-nb

์™ธ๋ถ€ ์—”๋“œํฌ์ธํŠธ ์•ก์„ธ์Šค

1

get-started-partitioned-models

๋ถ„ํ•  ๋ชจ๋ธ ๋ฐ Snowflake Model Registry ์‹œ์ž‘ํ•˜๊ธฐ

1

get-started-snowapi-nb

Python API ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ Snowflake ์˜ค๋ธŒ์ ํŠธ ์ƒ์„ฑํ•˜๊ธฐ

1

get-started-snowpark-ws-nb

Snowflake Notebooks์™€ Python Worksheets์—์„œ Snowpark ์‹œ์ž‘ํ•˜๊ธฐ

1

get-started-snowflake-ml

Snowflake ML ์‹œ์ž‘ํ•˜๊ธฐ

4

ingest-json-data

๊ณต๊ฐœ JSON ์ˆ˜์ง‘ํ•˜๊ธฐ

1

intro-snowpark-pandas

Snowpark pandas ์†Œ๊ฐœ

1

intro-to-feature-store-nb

Snowflake Notebooks๋ฅผ ์‚ฌ์šฉํ•˜๋Š” Feature Store ์†Œ๊ฐœ

1

intro-to-snowflake-nb

๋‚ด ์ฒซ Notebook ํ”„๋กœ์ ํŠธ

1

load-csv-to-stage

S3์—์„œ CSV ๋กœ๋”ฉํ•˜๊ธฐ

1

ref-cells-and-vars

์ฐธ์กฐ ์…€ ๋ฐ ๋ณ€์ˆ˜

1

visual-data-stories

Snowflake Notebooks๋กœ ์‹œ๊ฐํ™”ํ•œ ๋ฐ์ดํ„ฐ ์Šคํ† ๋ฆฌ

1

working-with-files

ํŒŒ์ผ ์ž‘์—…ํ•˜๊ธฐ

1

๋ฐ๋ชจ๋กœ ์ž‘์—…ํ•˜๊ธฐยถ

์‚ฌ์ „ ์š”๊ตฌ ์‚ฌํ•ญ ์„ ์™„๋ฃŒํ•œ ํ›„ ๋‹ค์Œ ์„น์…˜์— ์„ค๋ช…๋œ ๋Œ€๋กœ ๋ฐ๋ชจ๋กœ ์ž‘์—…ํ•˜๊ธฐ ์œ„ํ•ด Snowflake Demos API ๋ฅผ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๋ฐ๋ชจ ๋กœ๋”ฉ ๋ฐ ์‚ดํŽด๋ณด๊ธฐยถ

  • Snowflake์—์„œ ํŠน์ • ๋ฐ๋ชจ๋ฅผ ๋กœ๋“œํ•˜๊ณ  ์—ฐ๊ด€๋œ ๋ฆฌ์†Œ์Šค๋ฅผ ์„ค์ •ํ•˜๋ ค๋ฉด help() ์ถœ๋ ฅ์—์„œ ์ฐพ์€ ์‚ฌ์šฉ ๊ฐ€๋Šฅํ•œ ๋ฐ๋ชจ์˜ demo_name ์„ ์ธ์ž๋กœ ์ง€์ •ํ•˜์—ฌ load_demo() ๋ฅผ ํ˜ธ์ถœํ•ฉ๋‹ˆ๋‹ค.

    ์˜ˆ:

    load_demo('get-started-snowflake-ml')
    
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ํŒ

  • ๋ฐ๋ชจ์— ๋Œ€ํ•œ ์ฐธ์กฐ๋ฅผ ์˜ค๋ธŒ์ ํŠธ๋กœ ์ €์žฅํ•˜๋ ค๋ฉด load_demo() ์˜ ๊ฒฐ๊ณผ๋ฅผ ๋ณ€์ˆ˜์— ํ• ๋‹นํ•˜์‹ญ์‹œ์˜ค.

    demo = load_demo('get-started-snowflake-ml')
    
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๋‹ค๋‹จ๊ณ„ ๋ฐ๋ชจ(num_steps > 1)๋กœ ์ž‘์—…ํ•˜๋Š” ๊ฒฝ์šฐ ๊ฒฐ๊ณผ๋ฅผ ๋ณ€์ˆ˜์— ํ• ๋‹นํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. ๋ฐ๋ชจ์˜ ๋‹ค์Œ ๋…ธํŠธ๋ถ์œผ๋กœ ์ด๋™ํ•˜๋ ค๋ฉด show_next() ๋˜๋Š” show(step=<number>) ์„(๋ฅผ) ํ˜ธ์ถœํ•  ๋•Œ ์ด ์ฐธ์กฐ๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.

์ด ์ฐธ์กฐ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋‚˜์ค‘์— ๋ฐ๋ชจ๋ฅผ ๋น ๋ฅด๊ฒŒ ํ•ด์ฒดํ•  ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.

์ด ํ•จ์ˆ˜๋Š” ๋‹ค์Œ์„ ์ˆ˜ํ–‰ํ•ฉ๋‹ˆ๋‹ค.

  • ๋ฐ๋ชจ๋ฅผ ์ฒ˜์Œ ๋กœ๋”ฉํ•˜๋Š” ๊ฒฝ์šฐ Snowflake์— ๋Œ€ํ•œ ์—ฐ๊ฒฐ์„ ์ƒ์„ฑํ•ฉ๋‹ˆ๋‹ค.

  • ํ•„์š”ํ•œ ๋…ธํŠธ๋ถ์„ ๋งŒ๋“ญ๋‹ˆ๋‹ค.

  • load_demo() ๋ฅผ ๋ณ€์ˆ˜์— ํ• ๋‹นํ•˜์ง€ ์•Š์€ ๊ฒฝ์šฐ ๋ฐ๋ชจ์˜ ์ฒซ ๋ฒˆ์งธ ๋‹จ๊ณ„(1๋‹จ๊ณ„)์— ๋Œ€ํ•ด ๋…ธํŠธ๋ถ URL ์„ ํ‘œ์‹œํ•ฉ๋‹ˆ๋‹ค.

    • ๋ณ€์ˆ˜์— load_demo() ๋ฅผ ํ• ๋‹นํ•œ ๊ฒฝ์šฐ demo.show() ๋ฅผ ํ˜ธ์ถœํ•˜์—ฌ ์ฒซ ๋ฒˆ์งธ ๋…ธํŠธ๋ถ URL ์„ ๊ฐ€์ ธ์™€์•ผ ํ•ฉ๋‹ˆ๋‹ค.

์ถœ๋ ฅ์€ ๋‹ค์Œ๊ณผ ๋น„์Šทํ•œ ํ˜•ํƒœ์—ฌ์•ผ ํ•ฉ๋‹ˆ๋‹ค.

Connecting to Snowflake...โœ…
Using ACCOUNTADMIN role...โœ…
Creating Database SNOWFLAKE_DEMO_DB...โœ…
Creating Schema SNOWFLAKE_DEMO_SCHEMA...โœ…
Creating Warehouse SNOWFLAKE_DEMO_WH...โœ…
Creating Stage SNOWFLAKE_DEMO_STAGE...โœ…
Uploading files to stage SNOWFLAKE_DEMO_STAGE/get-started-snowflake-ml and creating notebooks...
Creating notebook get_started_snowflake_ml_start_here...โœ…
Creating notebook get_started_snowflake_ml_sf_nb_snowflake_ml_feature_transformations...โœ…
Creating notebook get_started_snowflake_ml_sf_nb_snowflake_ml_model_training_inference...โœ…
Creating notebook get_started_snowflake_ml_sf_nb_snowpark_ml_adv_mlops...โœ…
Running setup for this demo...โœ…

์ฐธ๊ณ 

์ธ์‡„๋œ ๋…ธํŠธ๋ถ URL์— ์•Œ๋ ค์ง„ ๋ฌธ์ œ๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด URL ์ด ๋ฐ”๋กœ ์—ด๋ฆฌ์ง€ ์•Š๋Š”๋‹ค๋ฉด, ๋ณต์‚ฌํ•˜์—ฌ ์ƒˆ ๋ธŒ๋ผ์šฐ์ € ํƒญ์— ๋ถ™์—ฌ๋„ฃ๊ฑฐ๋‚˜ Snowsight ์˜ Notebooks ํƒญ์—์„œ ๋…ธํŠธ๋ถ์— ์ˆ˜๋™์œผ๋กœ ์•ก์„ธ์Šคํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๋ฐ๋ชจ URL ๋ณด๊ธฐยถ

show() ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋ฐ๋ชจ์˜ ํŠน์ • ๋‹จ๊ณ„๋กœ URL ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

  • ํ˜„์žฌ ๋‹จ๊ณ„์˜ URL ์„ ํ™•์ธํ•˜๋ ค๋ฉด ๋จผ์ € load_demo() ์˜ ๊ฒฐ๊ณผ๋ฅผ demo ์™€ ๊ฐ™์€ ๋ณ€์ˆ˜์— ํ• ๋‹นํ•˜๊ณ  ์ธ์ž ์—†์ด show() ๋ฅผ ํ˜ธ์ถœํ•ฉ๋‹ˆ๋‹ค.

    demo.show()
    
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    ์ถœ๋ ฅ์€ ๋‹ค์Œ๊ณผ ์œ ์‚ฌํ•œ ํ˜•ํƒœ์—ฌ์•ผ ํ•ฉ๋‹ˆ๋‹ค.

    Showing step 1.
    Please copy and paste this url in your web browser to open the notebook:
    https://app.snowflake.com/myorg/myaccount/#/notebooks/SNOWFLAKE_DEMO_DB.SNOWFLAKE_DEMO_SCHEMA.GET_STARTED_SNOWFLAKE_ML_START_HERE
    
  • ๋ฐ๋ชจ์˜ ํŠน์ • ๋‹จ๊ณ„์— ๋Œ€ํ•œ ๋…ธํŠธ๋ถ URL ์„ ๊ฐ€์ ธ์˜ค๋ ค๋ฉด ์ง€์ •๋œ ๋‹จ๊ณ„ ๋ฒˆํ˜ธ์™€ ํ•จ๊ป˜ step ์ธ์ž๋ฅผ show() ์— ์ „๋‹ฌํ•ฉ๋‹ˆ๋‹ค.

    demo.show(step=1)
    
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  • ๋‹ค๋‹จ๊ณ„ ๋ฐ๋ชจ์˜ ๋‹ค์Œ ๋‹จ๊ณ„๋ฅผ ์œ„ํ•ด ๋…ธํŠธ๋ถ URL ์„ ๊ฐ€์ ธ์˜ค๋ ค๋ฉด show_next() ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜์‹ญ์‹œ์˜ค.

    demo.show_next()
    
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๋ฐ๋ชจ ๋ฐ ํ•ด๋‹น ๋ฆฌ์†Œ์Šค ์‚ญ์ œํ•˜๊ธฐยถ

์„ค์ •ํ•œ ๋ฐ๋ชจ ํƒ์ƒ‰์ด ๋๋‚˜๋ฉด ์ƒ์„ฑ๋œ ๋ชจ๋“  ๋ฆฌ์†Œ์Šค, ๋ฐ์ดํ„ฐ ์„ธํŠธ ๋ฐ ๋…ธํŠธ๋ถ์„ ์ •๋ฆฌํ•˜๋Š” ๊ฒƒ์ด ์ข‹์Šต๋‹ˆ๋‹ค.

  • ๋‹จ์ผ ๋ฐ๋ชจ ๋ฐ ๊ด€๋ จ ๋ฆฌ์†Œ์Šค๋ฅผ ์‚ญ์ œํ•˜๋ ค๋ฉด ๋จผ์ € load_demo() ์˜ ๊ฒฐ๊ณผ๋ฅผ demo ์™€ ๊ฐ™์€ ๋ณ€์ˆ˜์— ํ• ๋‹นํ•˜๊ณ  teardown() ์„ ํ˜ธ์ถœํ•ฉ๋‹ˆ๋‹ค.

    demo.teardown()
    
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  • ์„ค์ •๋œ ๋ชจ๋“  ๋ฐ๋ชจ ๋ฐ ๊ด€๋ จ ๋ฆฌ์†Œ์Šค๋ฅผ ์‚ญ์ œํ•˜๋ ค๋ฉด teardown() ์„ ์ตœ์ƒ์œ„ ํ•จ์ˆ˜๋กœ ํ˜ธ์ถœํ•˜์‹ญ์‹œ์˜ค.

    teardown()
    
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