[Bug]: pybam.Experiment parse units error

[chuckliu1979]

PyBaMM Version

24.9.0

Python Version

python 3.10

Describe the bug

in https://github.com/pybamm-team/PyBaMM/blob/develop/src/pybamm/experiment/step/base_step.py function def _convert_electric(value_string), if the value_string float value contains 'e' or 'E', the units incorrect parsed:

Python 3.12.3 (main, Nov 6 2024, 18:32:19) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

value_string = "-1.1729285959021311e-05 W"
unit = value_string.lstrip("0123456789.- ")
unit
'e-05 W'
unit = value_string.lstrip("0123456789eE.- ")
unit
'W'

for python3, according to https://docs.python.org/3/library/functions.html#float, should accept 'e' or 'E' as well

Steps to Reproduce

1. value_string = "-1.1729285959021311e-05 W"
2. unit = value_string.lstrip("0123456789.- ")

get incorrect unit 'e-05 W', it should be 'W'

Relevant log output