Converting Exponential To Float

This is my code, trying to convert the second field of the line from exponential into float. outputrrd = processrrd.communicate() (output, error) = outputrrd output_lines = output.

Solution 1:

The easy way is replace! One simple example:

value=str('6,0865000000e-01')
value2=value.replace(',', '.')
float(value2)
0.60865000000000002

Solution 2:

The reason is the use of comma in 6,0865000000e-01. This won't work because float() is not locale-aware. See PEP 331 for details.

Try locale.atof(), or replace the comma with a dot.

Solution 3:

The float is correct, just use format to display it as you want, i.e.:

print(format(the_float, '.8f'))

Solution 4:

I think it is useful to you:

defremove_exponent(value):
    """
       >>>(Decimal('5E+3'))
       Decimal('5000.00000000')
    """
    decimal_places = 8
    max_digits = 16ifisinstance(value, decimal.Decimal):
        context = decimal.getcontext().copy()
        context.prec = max_digits
        return"{0:f}".format(value.quantize(decimal.Decimal(".1") ** decimal_places, context=context))
    else:
        return"%.*f" % (decimal_places, value)

Solution 5:

Simply by casting string into float:

new_val = float('9.81E7')