How to get milliseconds from pandas.Timedelta object

If you have a pandas.Timedelta object, you can use Timedelta.total_seconds() to get the seconds as a floating-point number with millisecond resolution and then multiply with one billion (1e3, the number of milliseconds in one second) to obtain the number of milliseconds in the Timedelta:

timedelta.total_seconds() * 1e3

In case you want an integer, use

int(round(timedelta.total_seconds() * 1e3))

Note that using round() is required here to avoid errors due to floating point precision.

or use this function definition:

def milliseconds_from_timedelta(timedelta):
    """Compute the milliseconds in a timedelta as floating-point number"""
    return timedelta.total_seconds() * 1e3

def milliseconds_from_timedelta_integer(timedelta):
    """Compute the milliseconds in a timedelta as integer number"""
    return int(round(timedelta.total_seconds() * 1e3))

# Usage example:
ms = milliseconds_from_timedelta(timedelta)
print(ms) # Prints 2000.752
ms = milliseconds_from_timedelta_integer(timedelta)
print(ms) # Prints 2001