If you're trying to, e.g., subtract a list of dicts from another list of dicts, but the list to subtract is large, what do you do? If you can decorate your values in some way that they're hashable, that solves the …

Apr 1, 2012 · I am trying to create a calculator, but I am having trouble writing a function that will subtract numbers from a list. For example: class Calculator(object): def __init__(self, args): ...

How to subtract datetimes with python Asked 14 years, 11 months ago Modified 2 years, 9 months ago Viewed 86k times

11 The python timedelta library should do what you need. A timedelta is returned when you subtract two datetime instances.

Subtracting datetime objects with Python Asked 13 years, 4 months ago Modified 1 year, 1 month ago Viewed 152k times

I have two different dates and I want to know the difference in days between them. The format of the date is YYYY-MM-DD. I have a function that can ADD or SUBTRACT a given number to a date: def

Jan 13, 2009 · I have a Python datetime.datetime object. What is the best way to subtract one day?

2 There is another, quite simple way to subtract columns from two dataframes: copy one, and subtract the columns you want in the copy.

For python 3.4, first you'd need to convert the strings representing times into datetime objects, then the datetime module has helpful tools work with dates and times.

Feb 7, 2011 · Using range and len together in python is almost always a code smell, invariably there's a better way of doing things as in the numerous examples given above.