python scientific notation with forced leading zero

Question

I want to have Python2.7 print out floating point numbers in scientific notation, forced to start with 0. For instance, assume

a=1234567890e12
print '{:22.16E}'.format(a)
1.2345678900000000E+21

However, I want a print output that looks like:

0.1234567890000000E+22

Notice that the exponent is raised by one since the desired output is forced to a leading zero. How can I achieve this? Thanks.

Answer 1

The fortranformat package will do what you are looking for.

import fortranformat as ff

a=1234567890e12
lineformat = ff.FortranRecordWriter('(1E26.16)')
lineformat.write([a])

Output:

'    0.1234567890000000E+22'