I have read this, but I am still confused about how I set the column width when using pandas.DataFrame.to_html.

import datetime
import pandas

data = {'Los Angles': {datetime.date(2018, 9, 24): 20.5, datetime.date(2018, 9, 25): 1517.1},
        'London': {datetime.date(2018, 9, 24): 0, datetime.date(2018, 9, 25): 1767.4},
        'Kansas City': {datetime.date(2018, 9, 24): 10, datetime.date(2018, 9, 25): 1.4}}

df = pandas.DataFrame(data=data)

html = df.to_html()

The above code results in :

How do I go about forcing the column width so that they are the same?

Try this:

import datetime
import pandas

data = {'Los Angles': {datetime.date(2018, 9, 24): 20.5, datetime.date(2018, 9, 25): 1517.1},
        'London': {datetime.date(2018, 9, 24): 0, datetime.date(2018, 9, 25): 1767.4},
        'Kansas City': {datetime.date(2018, 9, 24): 10, datetime.date(2018, 9, 25): 1.4}}

df = pandas.DataFrame(data=data)
pandas.set_option('display.max_colwidth', 40)

html = df.to_html()