Enhancements and Bug Fixes
Tables Feature - Added the `create_table` method, which returns a `Table` object. This can be used to display watchlists, order windows, position windows and more. - See the new page on the docs for more information! Bugs - Fixed a bug preventing the named column of a line to not work as a label of the series. - Fixed a bug causing drawings loaded from the minute timeframe to not show on a daily timeframe. - Fixed a bug causing `chart.exit` to not work. - Fixed a bug preventing the chart from being moved after placing a ray. - Fixed the ‘price in hoveringOver’ web console error. Enhancements - The date/time column can also be the `name` of the passed series object. - Added the `label` method to `HorizontalLine`, allowing for the price line label of horizontal lines to be updated. - `None` or an empty DataFrame can now be passed to `line.set` as a means to clear it. - Seperate Chart objects will now run on the same pywebview instance. This means that any Chart objects created after the first will inherit the first Chart’s API. - Reorganized the documentation for clarity.
This commit is contained in:
louisnw
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README.md
39
README.md
@ -5,7 +5,7 @@
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[](https://pypi.org/project/lightweight-charts/)
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[](https://python.org "Go to Python homepage")
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[](https://github.com/louisnw01/lightweight-charts-python/blob/main/LICENSE)
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[](https://lightweight-charts-python.readthedocs.io/en/latest/docs.html)
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[](https://lightweight-charts-python.readthedocs.io/en/latest/common_methods.html)
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@ -24,9 +24,10 @@ ___
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1. Simple and easy to use.
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2. Blocking or non-blocking GUI.
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3. Streamlined for live data, with methods for updating directly from tick data.
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4. Multi-Pane Charts using the [`SubChart`](https://lightweight-charts-python.readthedocs.io/en/latest/docs.html#subchart).
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4. Multi-Pane Charts using the [`SubChart`](https://lightweight-charts-python.readthedocs.io/en/latest/common_methods.html#create-subchart-subchart).
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5. The Toolbox, allowing for trendlines, rays and horizontal lines to be drawn directly onto charts.
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6. [Callbacks](https://lightweight-charts-python.readthedocs.io/en/latest/docs.html#callbacks) allowing for timeframe (1min, 5min, 30min etc.) selectors, searching, and more.
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6. [Callbacks](https://lightweight-charts-python.readthedocs.io/en/latest/callbacks.html) allowing for timeframe (1min, 5min, 30min etc.) selectors, searching, hotkeys, and more.
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7. Tables for watchlists, order entry, and trade management.
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7. Direct integration of market data through [Polygon.io's](https://polygon.io/?utm_source=affiliate&utm_campaign=pythonlwcharts) market data API.
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__Supports:__ Jupyter Notebooks, PyQt, wxPython, Streamlit, and asyncio.
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@ -194,9 +195,7 @@ ___
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### 6. Callbacks:
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```python
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import asyncio
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import pandas as pd
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from lightweight_charts import Chart
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@ -204,49 +203,45 @@ def get_bar_data(symbol, timeframe):
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if symbol not in ('AAPL', 'GOOGL', 'TSLA'):
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print(f'No data for "{symbol}"')
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return pd.DataFrame()
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return pd.read_csv(f'bar_data/{symbol}_{timeframe}.csv')
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return pd.read_csv(f'../examples/6_callbacks/bar_data/{symbol}_{timeframe}.csv')
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class API:
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def __init__(self):
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self.chart = None # Changes after each callback.
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async def on_search(self, searched_string): # Called when the user searches.
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def on_search(self, searched_string): # Called when the user searches.
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new_data = get_bar_data(searched_string, self.chart.topbar['timeframe'].value)
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if new_data.empty:
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return
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self.chart.topbar['corner'].set(searched_string)
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self.chart.topbar['symbol'].set(searched_string)
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self.chart.set(new_data)
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async def on_timeframe_selection(self): # Called when the user changes the timeframe.
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new_data = get_bar_data(self.chart.topbar['corner'].value, self.chart.topbar['timeframe'].value)
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def on_timeframe_selection(self): # Called when the user changes the timeframe.
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new_data = get_bar_data(self.chart.topbar['symbol'].value, self.chart.topbar['timeframe'].value)
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if new_data.empty:
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return
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self.chart.set(new_data)
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async def on_horizontal_line_move(self, line_id, price):
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self.chart.set(new_data, True)
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def on_horizontal_line_move(self, line_id, price):
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print(f'Horizontal line moved to: {price}')
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async def main():
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if __name__ == '__main__':
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api = API()
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chart = Chart(api=api, topbar=True, searchbox=True, toolbox=True)
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chart.legend(True)
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chart.topbar.textbox('corner', 'TSLA')
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chart.topbar.textbox('symbol', 'TSLA')
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chart.topbar.switcher('timeframe', api.on_timeframe_selection, '1min', '5min', '30min', default='5min')
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df = get_bar_data('TSLA', '5min')
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chart.set(df)
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chart.horizontal_line(200, interactive=True)
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await chart.show_async(block=True)
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if __name__ == '__main__':
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asyncio.run(main())
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chart.show(block=True)
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```
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@ -254,7 +249,7 @@ ___
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<div align="center">
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[](https://lightweight-charts-python.readthedocs.io/en/latest/docs.html)
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[](https://lightweight-charts-python.readthedocs.io/en/latest/common_methods.html)
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Inquiries: [shaders_worker_0e@icloud.com](mailto:shaders_worker_0e@icloud.com)
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___
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