Question

我想一次绘制2个图形。我像这样在Jupiter笔记本中写代码

import matplotlib.pyplot as plt
import numpy as np
import pandas as pd
import plotly
import plotly.graph_objs as go

import plotly.offline as offline
plotly.offline.init_notebook_mode(connected=False)

x = "test.csv"
df = pd.read_csv(x)

a = df["A"].values.tolist()
b = df["B"].values.tolist()

a = pd.Series(a)
b = pd.Series(b)

data = [
        plotly.graph_objs.Scatter(y = a, mode = 'lines', name = 'A')
        plotly.graph_objs.Scatter(y = b, mode = 'lines', name = 'B', yaxis="y2")
]

layout = plotly.graph_objs.Layout(
    title="A&B",
    xaxis={"title":"Date"},
    yaxis={"title":"Data-a"},
    yaxis2={"title":"Data-b", "overlaying":"y", "side":"right"},
)

fig = plotly.graph_objs.Figure(data=data, layout=layout)
plotly.offline.iplot(fig)

运行它时，出现此错误：

plotly.graph_objs.Scatter(y = b, mode = 'lines', name = ‘B’, yaxis="y2")
         ^
SyntaxError: invalid syntax

我认为代码中没有语法错误，所以我真的不明白为什么会发生这种错误。我的代码有什么问题？应该如何解决？

Answer 1

这些行末尾缺少逗号：

data = [
        plotly.graph_objs.Scatter(y = a, mode = 'lines', name = 'A'),
        plotly.graph_objs.Scatter(y = b, mode = 'lines', name = 'B', yaxis="y2"),
]

SyntaxError：语法无效为什么会发生这种错误？

1 个答案: