Can I set variable column widths in pandas?
Question:
I’ve got several columns with long strings of text in a pandas data frame, but am only interested in examining one of them. Is there a way to use something along the lines of pd.set_option('max_colwidth', 60) but for a single column only, rather than expanding the width of all the columns in my df?
Answers:
If you want to change the display in a Jupyter Notebook, you can use the Style feature.
To use this formatting for only some columns simply indicate the column(s) to enlarge thanks to the subset parameter. This is basically HTML and CSS.
### Test data
df = DataFrame({'text': ['foo foo foo foo foo foo foo foo', 'bar bar bar bar bar'],
'number': [1, 2]})
df.style.set_properties(subset=['text'], **{'width': '300px'})
The easiest solution I have found on newer versions of Pandas is outlined in this page of the Pandas reference materials. Search for display.max_colwidth — about 1/3rd of the way down the page describes how to use it e.g.:
pd.set_option('max_colwidth', 400)
Note that this will set the value for the session, or until changed.
If you only want to make temporary changes see this info on temporarily setting context e.g.:
from pandas import option_context
with option_context('display.max_colwidth', 400):
display(df.head())
I’ve not found an obvious way to set individual columns but this approach only scales up those that need more space to the maximum you set.
Also possibly of use if trying to adjust how to fit things on screen/in tables/making space for other columns is pd.set_option('precision', 2) which changes the no of decimal places.
I’ve got several columns with long strings of text in a pandas data frame, but am only interested in examining one of them. Is there a way to use something along the lines of pd.set_option('max_colwidth', 60) but for a single column only, rather than expanding the width of all the columns in my df?
If you want to change the display in a Jupyter Notebook, you can use the Style feature.
To use this formatting for only some columns simply indicate the column(s) to enlarge thanks to the subset parameter. This is basically HTML and CSS.
### Test data
df = DataFrame({'text': ['foo foo foo foo foo foo foo foo', 'bar bar bar bar bar'],
'number': [1, 2]})
df.style.set_properties(subset=['text'], **{'width': '300px'})
The easiest solution I have found on newer versions of Pandas is outlined in this page of the Pandas reference materials. Search for display.max_colwidth — about 1/3rd of the way down the page describes how to use it e.g.:
pd.set_option('max_colwidth', 400)
Note that this will set the value for the session, or until changed.
If you only want to make temporary changes see this info on temporarily setting context e.g.:
from pandas import option_context
with option_context('display.max_colwidth', 400):
display(df.head())
I’ve not found an obvious way to set individual columns but this approach only scales up those that need more space to the maximum you set.
Also possibly of use if trying to adjust how to fit things on screen/in tables/making space for other columns is pd.set_option('precision', 2) which changes the no of decimal places.