# lightweight_charts_python
[](https://pypi.org/project/lightweight-charts/)
[](https://python.org "Go to Python homepage")
[](https://github.com/louisnw01/lightweight-charts-python/blob/main/LICENSE)
[](https://lightweight-charts-python.readthedocs.io/en/latest/docs.html)
lightweight-charts-python aims to provide a simple and pythonic way to access and implement [TradingView's Lightweight Charts](https://www.tradingview.com/lightweight-charts/).
## Installation
```
pip install lightweight_charts
```
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## Features
1. Simple and easy to use.
2. Blocking or non-blocking GUI.
3. Streamlined for live data, with methods for updating directly from tick data.
4. Support for PyQt and wxPython.
5. Multi-Pane Charts using the `SubChart` ([examples](https://lightweight-charts-python.readthedocs.io/en/latest/docs.html#subchart)).
___
### 1. Display data from a csv:
```python
import pandas as pd
from lightweight_charts import Chart
if __name__ == '__main__':
chart = Chart()
# Columns: | time | open | high | low | close | volume (if volume is enabled) |
df = pd.read_csv('ohlcv.csv')
chart.set(df)
chart.show(block=True)
```
___
### 2. Updating bars in real-time:
```python
import pandas as pd
from time import sleep
from lightweight_charts import Chart
if __name__ == '__main__':
chart = Chart()
df1 = pd.read_csv('ohlcv.csv')
df2 = pd.read_csv('next_ohlcv.csv')
chart.set(df1)
chart.show()
last_close = df1.iloc[-1]
for i, series in df2.iterrows():
chart.update(series)
if series['close'] > 20 and last_close < 20:
chart.marker(text='The price crossed $20!')
last_close = series['close']
sleep(0.1)
```
___
### 3. Updating bars from tick data in real-time:
```python
import pandas as pd
from time import sleep
from lightweight_charts import Chart
if __name__ == '__main__':
df1 = pd.read_csv('ohlc.csv')
# Columns: | time | price | volume (if volume is enabled) |
df2 = pd.read_csv('ticks.csv')
chart = Chart(volume_enabled=False)
chart.set(df1)
chart.show()
for i, tick in df2.iterrows():
chart.update_from_tick(tick)
sleep(0.3)
```
___
### 4. Line Indicators:
```python
import pandas as pd
from lightweight_charts import Chart
def calculate_sma(data: pd.DataFrame, period: int = 50):
def avg(d: pd.DataFrame):
return d['close'].mean()
result = []
for i in range(period - 1, len(data)):
val = avg(data.iloc[i - period + 1:i])
result.append({'time': data.iloc[i]['date'], 'value': val})
return pd.DataFrame(result)
if __name__ == '__main__':
chart = Chart()
df = pd.read_csv('ohlcv.csv')
chart.set(df)
line = chart.create_line()
sma_data = calculate_sma(df)
line.set(sma_data)
chart.show(block=True)
```
___
### 5. Styling:
```python
import pandas as pd
from lightweight_charts import Chart
if __name__ == '__main__':
chart = Chart(debug=True)
df = pd.read_csv('ohlcv.csv')
chart.layout(background_color='#090008', text_color='#FFFFFF', font_size=16,
font_family='Helvetica')
chart.candle_style(up_color='#00ff55', down_color='#ed4807',
border_up_color='#FFFFFF', border_down_color='#FFFFFF',
wick_up_color='#FFFFFF', wick_down_color='#FFFFFF')
chart.volume_config(up_color='#00ff55', down_color='#ed4807')
chart.watermark('1D', color='rgba(180, 180, 240, 0.7)')
chart.crosshair(mode='normal', vert_color='#FFFFFF', vert_style='dotted',
horz_color='#FFFFFF', horz_style='dotted')
chart.legend(visible=True, font_size=14)
chart.set(df)
chart.show(block=True)
```
___
### 6. Callbacks:
```python
import pandas as pd
from lightweight_charts import Chart
def on_click(bar: dict):
print(f"Time: {bar['time']} | Close: {bar['close']}")
if __name__ == '__main__':
chart = Chart()
df = pd.read_csv('ohlcv.csv')
chart.set(df)
chart.subscribe_click(on_click)
chart.show(block=True)
```
___
[](https://lightweight-charts-python.readthedocs.io/en/latest/docs.html)
___
_This package is an independent creation and has not been endorsed, sponsored, or approved by TradingView. The author of this package does not have any official relationship with TradingView, and the package does not represent the views or opinions of TradingView._