python - 我应该如何解决 Python2.6 下的 Plotly 语法错误？

Question

我被迫将 Python2.6 用于 CGI 项目，并尝试使用 Plotly 创建直方图。

这是创建直方图的函数:

def get_histogram(self, dataset_uuid, target, title, xaxisTitle, yaxisTitle):
    max_threshold = self.get_max_threshold(dataset_uuid, target)

    thresholds = [0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5]
    counts = []

    for i, percentage in enumerate(thresholds):

        # Query the database for all of the records with frequencies above the
        # threshold.
        result = (self.session.query(Mesh)
            .filter(Mesh.frequency >= percentage * max_threshold)
        )

        # Appends the fetched record count to the list of counts
        counts.append(result.count())

        # Change percentages from float to integer
        thresholds[i] = percentage * 100

    graph = go.Histogram(
        x = thresholds,
        y = counts,
        type='bar'
    )

    layout = go.Layout(
        title = title,
        xaxis = dict(
            title = xaxisTitle
        ),
        yaxis = dict(
            title = yaxisTitle
        )
    )

    data = [graph]
    figure = go.Figure(data = data, layout = layout)

    return json.dumps(figure, cls=plotly.utils.PlotlyJSONEncoder)

在 Python2.7 下，我的脚本按预期运行，但是，当我尝试 2.6 时，我收到以下语法错误:

Traceback (most recent call last):
  File "index.cgi", line 4, in <module>
    from viads import Application
  File "/Library/WebServer/Documents/viads/viads/__init__.py", line 3, in <module>
    from application import Application
  File "/Library/WebServer/Documents/viads/viads/application.py", line 8, in <module>
    from mysqlDatabase import MysqlDatabase
  File "/Library/WebServer/Documents/viads/viads/mysqlDatabase.py", line 3, in <module>
    from database import Database
  File "/Library/WebServer/Documents/viads/viads/database.py", line 9, in <module>
    import plotly.plotly
  File "/Library/Python/2.6/site-packages/plotly/__init__.py", line 31, in <module>
    from plotly import (plotly, graph_objs, grid_objs, tools, utils, session,
  File "/Library/Python/2.6/site-packages/plotly/plotly/__init__.py", line 10, in <module>
    from . plotly import (
  File "/Library/Python/2.6/site-packages/plotly/plotly/plotly.py", line 114
    user_plot_options = {k: v for k, v in user_plot_options.items()
                                ^
SyntaxError: invalid syntax

调查 plotly.py 揭示了以下列表理解:

user_plot_options = {k: v for k, v in user_plot_options.items()             
                      if k in default_plot_options}

我认为这是在尝试将 double 列表转换为 Plotly 配置选项的字典。

由于这是 Python2.6 的 Plotly 源代码本身的语法错误，我是否应该为我自己的项目修补它并考虑将其贡献回 Plotly？

附言我了解使用旧版本 Python 和不使用 FCGI 的缺点

Answer 1

我通过安装旧版本的 Plotly 解决了这个问题，特别是来自 https://github.com/plotly/plotly.py/releases 的 1.6.7 版本.