Pandas Style

Pandas Style#

Starting with itables>=1.6.0, ITables provides support for Pandas Style.

Warning

Pandas Style object use HTML. Please make sure that you trust the content of your table before passing allow_html=True.

Note

Unlike Pandas or Polar DataFrames, Styler objects are rendered directly using their to_html method, rather than passing the underlying table data to the DataTables library.

Because of this, the rendering of the table might differ slightly from the rendering of the corresponding DataFrame. In particular,

  • The downsampling is not available - please pay attention to the size of the table being rendered

  • Sorting of numbers will not work if the column contains NaNs.

import numpy as np
import pandas as pd

import itables

itables.init_notebook_mode()

# Before you do this, make sure that you trust the content of your tables
itables.options.allow_html = True

This is the DataFrame that we are going to style:

x = np.linspace(0, np.pi, 21)
df = pd.DataFrame({"sin": np.sin(x), "cos": np.cos(x)}, index=pd.Index(x, name="alpha"))

df
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Color#

From now on we will display df.style (a Pandas Styler object) rather than our DataFrame df.

Let’s start with a background gradient:

s = df.style
s.background_gradient(axis=None, cmap="YlOrRd")
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Format#

We can also choose how the data is formatted:

s.format("{:.3f}").format_index("{:.3f}")
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Caption#

s.set_caption("A Pandas Styler object with background colors").set_table_styles(
    [{"selector": "caption", "props": "caption-side: bottom; font-size:1em;"}]
)
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Tooltips#

ttips = pd.DataFrame(
    {
        "sin": ["The sinus of {:.6f} is {:.6f}".format(t, np.sin(t)) for t in x],
        "cos": ["The cosinus of {:.6f} is {:.6f}".format(t, np.cos(t)) for t in x],
    },
    index=df.index,
)
s.set_tooltips(ttips).set_caption("With tooltips")
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