如何在Plotly中更改子图的y轴范围

Question

我有以下代码：

from plotly.subplots import make_subplots
import requests 
import json
import datetime as dt
import pandas as pd
import plotly.graph_objects as go




def get_candles(symbol, window, interval='1h'):
    url = "https://api.binance.com/api/v1/klines"
    end_time = dt.datetime.utcnow()
    delta = dt.timedelta(hours = window)
    start_time = end_time - delta
    start_date = str(int(start_time.timestamp() * 1000))
    end_date = str(int(end_time.timestamp() * 1000))
    limit = '1000'
    market = symbol + 'BUSD'

    req_param = {"symbol": market, "interval": interval, "startTime": start_date, "endTime": end_date, "limit": limit}

    text = requests.get(url, params = req_param).text
    data = json.loads(text)
    df = pd.DataFrame(data)
    df.columns = ['open_time',
                    'o', 'h', 'l', 'c', 'v',
                    'close_time', 'qav', 'num_trades',
                    'taker_base_vol', 'taker_quote_vol', 'ignore']

    df.index = [dt.datetime.fromtimestamp(x/1000.0) for x in df.close_time]

    return df


def chart(symbol, interval='1h'):
    windows = {'1m': 1, '5m': 5, '15m': 15, '30m': 30, '1h': 60, '2h': 120, '4h': 240, '6h': 360, '12h': 720, '1d': 1440}
    chart = get_candles(symbol.upper(), windows[interval], interval)
    fig = make_subplots(specs=[[{"secondary_y": True}]])
    print(chart['v'].max())
    fig.add_trace(go.Candlestick(x=chart.index,
            open=chart['o'],
            high=chart['h'],
            low=chart['l'],
            close=chart['c'],
            name="yaxis1 data",
            yaxis='y1'), secondary_y=True)
    fig.add_trace(go.Bar(x=chart.index, y=chart['v'], name="yaxis2 data", yaxis="y2"), secondary_y=False)
    fig.layout.yaxis2.showgrid=False
    fig.update_yaxes(type="linear")
    fig.update_layout(xaxis_rangeslider_visible=False)
    
    # fig.show()

    fig.write_image("figure.png", engine="kaleido")
    
chart('bnb')

现在我想要它，使体积条只到图表总高度的1/3，我试着这样做：

fig.update_layout(yaxis1=dict(title=“bars”,domain=[0,int(2*chart['v'].max())]))

但这没什么用。

我如何给某个Y轴起一个名字并改变它的范围？

Answer 1

我不使用plotly，但查看文档，我看到了设置Y轴范围的如下内容：

Code: fig.update_yaxes(range=<VALUE>)
Type: list

https://plotly.com/python/reference/layout/yaxis/#layout-xaxis-range

对于标签/标题：

Code: fig.update_yaxes(title=dict(...))
Type: dict containing one or more of the keys listed below.

fig.update_layout(title_text=<VALUE>)

https://plotly.com/python/reference/layout/yaxis/#layout-yaxis-title