mirror of
https://github.com/ToolJet/ToolJet
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87 lines
2.9 KiB
Markdown
87 lines
2.9 KiB
Markdown
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---
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id: import-external-libraries-using-runpy
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title: Import External Libraries Using RunPy
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---
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ToolJet allows you to utilize python packages in your app by importing them using the [RunPy query](/docs/data-sources/run-py).
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In this how-to guide, we will import a few packages and use them in the application.
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:::caution Unsupported modules
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Modules with C/C++ extensions needing system libraries won't work in Pyodide, as it runs in a web browser without system library access. Pyodide, based on WebAssembly-compiled Python, also doesn't support certain system calls.
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:::
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- Start by creating a new application in ToolJet.
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- From the Query Panel, add a new RunPy query - it will be named *runpy1* by default.
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<div style={{textAlign: 'left', marginBotton: '15px'}}>
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<img className="screenshot-full" src="/img/how-to/import-python/runpy.png" alt="Import external libraries using RunPy" />
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</div>
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- Use micropip to install packages like Pandas and NumPy. **Run** the query to complete installation.
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```python
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import micropip
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await micropip.install('pandas')
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await micropip.install('numpy')
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```
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<div style={{textAlign: 'center'}}>
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<img className="screenshot-full" src="/img/how-to/import-python/installing.png" alt="Import external libraries using RunPy"/>
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</div>
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- Enable `Run this query on application load?` to make these packages available every time the application loads.
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## Generating Random Numbers with NumPy
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- Create a RunPy query using NumPy's random module to generate random numbers.
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```python
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from numpy import random
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x = random.binomial(n=10, p=0.5, size=10)
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print(x)
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```
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<div style={{textAlign: 'center'}}>
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<img className="screenshot-full" src="/img/how-to/import-python/random.gif" alt="Import external libraries using RunPy"/>
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</div>
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*You can check the output on the browser's console.*
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## Parse CSV data
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- Create a RunPy query to parse CSV data using `StringIO`, `csv`, and `Pandas` module.
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```python
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from io import StringIO
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import csv
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import pandas as pd
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scsv = components.filepicker1.file[0].content
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f = StringIO(scsv)
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reader = csv.reader(f, delimiter=',')
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df = pd.DataFrame(reader)
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print(df.info())
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print(df)
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```
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<div style={{textAlign: 'center'}}>
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<img className="screenshot-full" src="/img/how-to/import-python/csvparse.png" alt="Import external libraries using RunPy"/>
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</div>
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- Add a **File Picker** component on the canvas
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- Select `On File Loaded` as the Event and Run Query as the Action.
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- Select the query we just created as the Query.
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<div style={{textAlign: 'center'}}>
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<img className="screenshot-full" src="/img/how-to/import-python/event.png" alt="Import external libraries using RunPy"/>
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</div>
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- Finally, load a csv file on the File Picker component, **Run** related RunPy query and check the output on the browser console.
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<div style={{textAlign: 'center'}}>
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<img className="screenshot-full" src="/img/how-to/import-python/console.gif" alt="Import external libraries using RunPy"/>
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</div>
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