06b605d3a7
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.
47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
import pandas as pd
|
|
from lightweight_charts import Chart
|
|
|
|
|
|
def get_bar_data(symbol, timeframe):
|
|
if symbol not in ('AAPL', 'GOOGL', 'TSLA'):
|
|
print(f'No data for "{symbol}"')
|
|
return pd.DataFrame()
|
|
return pd.read_csv(f'bar_data/{symbol}_{timeframe}.csv')
|
|
|
|
|
|
class API:
|
|
def __init__(self):
|
|
self.chart: Chart = None # Changes after each callback.
|
|
|
|
def on_search(self, searched_string): # Called when the user searches.
|
|
new_data = get_bar_data(searched_string, self.chart.topbar['timeframe'].value)
|
|
if new_data.empty:
|
|
return
|
|
self.chart.topbar['symbol'].set(searched_string)
|
|
self.chart.set(new_data)
|
|
|
|
def on_timeframe_selection(self): # Called when the user changes the timeframe.
|
|
new_data = get_bar_data(self.chart.topbar['symbol'].value, self.chart.topbar['timeframe'].value)
|
|
if new_data.empty:
|
|
return
|
|
self.chart.set(new_data, True)
|
|
|
|
def on_horizontal_line_move(self, line_id, price):
|
|
print(f'Horizontal line moved to: {price}')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
api = API()
|
|
|
|
chart = Chart(api=api, topbar=True, searchbox=True, toolbox=True)
|
|
chart.legend(True)
|
|
|
|
chart.topbar.textbox('symbol', 'TSLA')
|
|
chart.topbar.switcher('timeframe', api.on_timeframe_selection, '1min', '5min', '30min', default='5min')
|
|
|
|
df = get_bar_data('TSLA', '5min')
|
|
chart.set(df)
|
|
|
|
chart.horizontal_line(200, interactive=True)
|
|
|
|
chart.show(block=True) |