How can I display full (non-truncated) dataframe information in HTML when converting from Pandas dataframe to HTML?

Set the display.max_colwidth option to None (or -1 before version 1.0):

pd.set_option('display.max_colwidth', None)

set_option documentation

For example, in IPython, we see that the information is truncated to 50 characters. Anything in excess is ellipsized:

https://i.stack.imgur.com/hANGS.png

If you set the display.max_colwidth option, the information will be displayed fully:

https://i.stack.imgur.com/Nxg2q.png

pd.set_option('display.max_columns', None)  

id (second argument) can fully show the columns.

While pd.set_option('display.max_columns', None) sets the number of the maximum columns shown, the option pd.set_option('display.max_colwidth', -1) sets the maximum width of each single field.

For my purposes I wrote a small helper function to fully print huge data frames without affecting the rest of the code. It also reformats float numbers and sets the virtual display width. You may adopt it for your use cases.

def print_full(x):
    pd.set_option('display.max_rows', None)
    pd.set_option('display.max_columns', None)
    pd.set_option('display.width', 2000)
    pd.set_option('display.float_format', '{:20,.2f}'.format)
    pd.set_option('display.max_colwidth', None)
    print(x)
    pd.reset_option('display.max_rows')
    pd.reset_option('display.max_columns')
    pd.reset_option('display.width')
    pd.reset_option('display.float_format')
    pd.reset_option('display.max_colwidth')

Jupyter Users

Whenever I need this for just one cell, I use this:

with pd.option_context('display.max_colwidth', None):
  display(df)

Try this too:

pd.set_option("max_columns", None) # show all cols
pd.set_option('max_colwidth', None) # show full width of showing cols
pd.set_option("expand_frame_repr", False) # print cols side by side as it's supposed to be

Another way of viewing the full content of the cells in a Pandas dataframe is to use IPython's display functions:

from IPython.display import HTML

HTML(df.to_html())

The following code results in the error below:

pd.set_option('display.max_colwidth', -1)

FutureWarning: Passing a negative integer is deprecated in version 1.0 and will not be supported in future version. Instead, use None to not limit the column width.

Instead, use:

pd.set_option('display.max_colwidth', None)

This accomplishes the task and complies with versions of Pandas following version 1.0.

For those looking to do this in Dask:

I could not find a similar option in Dask, but if I simply do this in same notebook for Pandas it works for Dask too.

import pandas as pd
import dask.dataframe as dd
pd.set_option('display.max_colwidth', -1) # This will set the no truncate for Pandas as well as for Dask. I am not sure how it does for Dask though, but it works.

train_data = dd.read_csv('./data/train.csv')
train_data.head(5)

For those who like to reduce typing (i.e., everyone!): pd.set_option('max_colwidth', None) does the same thing

Display the full dataframe for a specific cell:

import pandas as pd
with pd.option_context('display.max_colwidth', None,
                       'display.max_columns', None,
                       'display.max_rows', None):
    display(df)

The method above can be extended with more options.

Updated helper function from Karl Adler:

def display_full(x):
    with pd.option_context('display.max_rows', None,
                           'display.max_columns', None,
                           'display.width', 2000,
                           'display.float_format', '{:20,.2f}'.format,
                           'display.max_colwidth', None):
        display(x)

Change display options for all cells:

pd.set_option('display.max_colwidth', None)
pd.set_option('display.max_rows', None)
pd.set_option('display.max_columns', None)
display(df)