# Python代码
# 导入plotly
import plotly.graph_objects as go



# 创建Candlestick图
fig = go.Figure(data=[go.Candlestick(x=df.index,
                open=df['开盘'],
                high=df['最高'],
                low=df['最低'],
                close=df['收盘'])])

# 设置布局
fig.update_layout(title="股票K线图",
                  xaxis_title="日期",
                  yaxis_title="价格",
                  xaxis_rangeslider_visible=False)

# 显示图形
fig.show()

我需要在上面的K线图中添加5日、20日、30日均线，请给出添加均线的代码。

import pandas as pd
import plotly.graph_objects as go

# 计算移动平均线 (关键步骤)[1,3](@ref)
df['MA5'] = df['收盘'].rolling(window=5).mean()    # 5日均线
df['MA20'] = df['收盘'].rolling(window=20).mean()  # 20日均线
df['MA30'] = df['收盘'].rolling(window=30).mean()  # 30日均线

# 创建Candlestick图
fig = go.Figure(data=[go.Candlestick(
    x=df.index,
    open=df['开盘'],
    high=df['最高'],
    low=df['最低'],
    close=df['收盘'],
    name='K线'
)])

# 添加均线轨迹 (核心功能)[1,3](@ref)
fig.add_trace(go.Scatter(
    x=df.index,
    y=df['MA5'],
    mode='lines',
    name='5日均线',
    line=dict(color='royalblue', width=2)
))

fig.add_trace(go.Scatter(
    x=df.index,
    y=df['MA20'],
    mode='lines',
    name='20日均线',
    line=dict(color='orange', width=2)
))

fig.add_trace(go.Scatter(
    x=df.index,
    y=df['MA30'],
    mode='lines',
    name='30日均线',
    line=dict(color='green', width=2)
))

# 设置布局
fig.update_layout(
    title="股票K线图 (含均线系统)",
    xaxis_title="日期",
    yaxis_title="价格",
    legend_title="图例说明",
    xaxis_rangeslider_visible=False,
    hovermode="x unified"  # 鼠标悬停时显示所有数据[5](@ref)
)

# 显示图形
fig.show()