使用python中的plotly方法在y轴比例中添加货币符号

import plotly.express as px
import plotly.graph_objects as go

data = {'Country': ['USA', 'China', 'Germany'],
        'GDP': [21500, 14200, 3842]}

fig = go.Figure(data=go.Bar(x=data['Country'], y=data['GDP']))

def add_currency_symbol(value):
    return '$' + str(value)

fig.update_layout(yaxis_tickformat='$.2f',
                  yaxis_tickvals=data['GDP'],
                  yaxis_ticktext=list(map(add_currency_symbol, data['GDP'])))

fig.show()