Here\'s my code:
x = 1.0
y = 100000.0
print x/y
My quotient displays as 1.00000e-05
.
Is there any way to suppress
This is using Captain Cucumber's answer, but with 2 additions.
1) allowing the function to get non scientific notation numbers and just return them as is (so you can throw a lot of input that some of the numbers are 0.00003123 vs 3.123e-05 and still have function work.
2) added support for negative numbers. (in original function, a negative number would end up like 0.0000-108904 from -1.08904e-05)
def getExpandedScientificNotation(flt):
was_neg = False
if not ("e" in flt):
return flt
if flt.startswith('-'):
flt = flt[1:]
was_neg = True
str_vals = str(flt).split('e')
coef = float(str_vals[0])
exp = int(str_vals[1])
return_val = ''
if int(exp) > 0:
return_val += str(coef).replace('.', '')
return_val += ''.join(['0' for _ in range(0, abs(exp - len(str(coef).split('.')[1])))])
elif int(exp) < 0:
return_val += '0.'
return_val += ''.join(['0' for _ in range(0, abs(exp) - 1)])
return_val += str(coef).replace('.', '')
if was_neg:
return_val='-'+return_val
return return_val
With newer versions of Python (2.6 and later), you can use ''.format() to accomplish what @SilentGhost suggested:
'{0:f}'.format(x/y)
If it is a string
then use the built in float
on it to do the conversion for instance:
print( "%.5f" % float("1.43572e-03"))
answer:0.00143572
In addition to SG's answer, you can also use the Decimal module:
from decimal import Decimal
x = str(Decimal(1) / Decimal(10000))
# x is a string '0.0001'
Using the newer version ''.format
(also remember to specify how many digit after the .
you wish to display, this depends on how small is the floating number). See this example:
>>> a = -7.1855143557448603e-17
>>> '{:f}'.format(a)
'-0.000000'
as shown above, default is 6 digits! This is not helpful for our case example, so instead we could use something like this:
>>> '{:.20f}'.format(a)
'-0.00000000000000007186'
Starting in Python 3.6, this can be simplified with the new formatted string literal, as follows:
>>> f'{a:.20f}'
'-0.00000000000000007186'
Using 3.6.4, I was having a similar problem that randomly, a number in the output file would be formatted with scientific notation when using this:
fout.write('someFloats: {0:0.8},{1:0.8},{2:0.8}'.format(someFloat[0], someFloat[1], someFloat[2]))
All that I had to do to fix it was to add 'f':
fout.write('someFloats: {0:0.8f},{1:0.8f},{2:0.8f}'.format(someFloat[0], someFloat[1], someFloat[2]))