Scientific Notation formatting in Python

Question

How can get following formatting (input values are always less than 0.1):

> formatting(0.09112346)
0.91123E-01
> formatting(0.00112346)
0.11234E-02
         


        

Answer 1

In Python 3.6+, you could also use f-strings. For example:

In [31]: num = 0.09112346

In [32]: f'{num:.5E}'
Out[32]: '9.11235E-02'

It uses the same syntax as str.format(), given in the Format Specification Mini-Language section.