How do I send a styled pandas DataFrame by e-mail without losing the format?

Question

I am pretty new to Python and to the Jupyter Notebook. So any help will be appreciated. I was able to color specific cells of my DataFrame following this question.

Now suppose that I have that table with the "style" on it (as the one in the accepted answer) and I wish to send it by e-mail to someone (in this case, myself) without losing any of the format (it should contain the colored cells, the border, and everything else).

I have tried using the .render() function and then attaching the HTML code to the body of the e-mail but I keep getting a borderless table with no structure. I have followed this post to code the e-mail part. The only difference is that I am not using the "plain text" part.

Also, how can I add more features to the table itself? Like adding table title, modify the spacing between the columns, increasing or decreasing the font size?

Thank you!

Answer 1

Here is a function that I use for this very case. The for loop is to create banded rows.

def html_style_basic(df,index=True):
    import pandas as pd
    x = df.to_html(index = index)
    x = x.replace('<table border="1" class="dataframe">','<table style="border-collapse: collapse; border-spacing: 0; width: 25%;">')
    x = x.replace('<th>','<th style="text-align: left; padding: 2px; border-left: 1px solid #cdd0d4;" align="left">')
    x = x.replace('<td>','<td style="text-align: left; padding: 2px; border-left: 1px solid #cdd0d4; border-right: 1px solid #cdd0d4;" align="left">')
    x = x.replace('<tr style="text-align: right;">','<tr>')

    x = x.split()
    count = 2 
    index = 0
    for i in x:
        if '<tr>' in i:
            count+=1
            if count%2==0:
                x[index] = x[index].replace('<tr>','<tr style="background-color: #f2f2f2;" bgcolor="#f2f2f2">')
        index += 1
    return ' '.join(x)

Answer 2

Based on the fact that you already got a styled DataFrame through Format the color of a cell in a pandas dataframe according to multiple conditions , then you can save it to a html file.

with open('DataFrame.html', 'a') as f:
    f.write(df.render() )

For the further need of customization, visit https://pandas.pydata.org/pandas-docs/stable/user_guide/style.html .

Answer 3

I was able to find an answer to my question following this post: how to draw a beautiful colorful table with pandas or other package in Python?

Essentially, if you use the .set_table_styles to add the borders after adding the colors to the cells, the html code sent by e-mail will be displayed properly. I hope it helps anyone with the same issue.