How to suppress scientific notation when printing float values

Question

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 scientific notation and make it display as 0 00001  I m going to use the result as a string

User · Answer

Most of the answers above require you to specify precision. But what if you want to display floats like this, with no unnecessary zeros:

1
0.1
0.01
0.001
0.0001
0.00001
0.000001
0.000000000001

numpy has an answer: np.format_float_positional

import numpy as np

def format_float(num):
    return np.format_float_positional(num, trim='-')

User · Answer

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

User · Answer

With newer versions of Python  2 6 and later   you can use    format   to accomplish what  SilentGhost suggested     0 f   format x y

User · Answer

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    gt  gt  gt  a   -7 1855143557448603e-17  gt  gt  gt     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    gt  gt  gt      20f   format a   -0 00000000000000007186    Update  Starting in Python 3 6  this can be simplified with the new formatted string literal  as follows    gt  gt  gt  f  a  20f    -0 00000000000000007186

User · Answer

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   gt  0          return val    str coef  replace                  return val       join   0  for   in range 0  abs exp - len str coef  split      1           elif int exp   lt  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

User · Answer

f     x y   but you need to manage precision yourself  e g     f     1 10  8   will display zeros only  details are in the docs Or for Python 3 the equivalent old formatting or the newer style formatting

User · Answer

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

User · Answer

Another option  if you are using pandas and would like to suppress scientific notation for all floats  is to adjust the pandas options   import pandas as pd pd options display float format       2f   format

User · Answer

This will work for any exponent   def getExpandedScientificNotation flt       str vals   str flt  split  e       coef   float str vals 0       exp   int str vals 1       return val          if int exp   gt  0          return val    str coef  replace                  return val       join   0  for   in range 0  abs exp - len str coef  split      1           elif int exp   lt  0          return val     0           return val       join   0  for   in range 0  abs exp  - 1            return val    str coef  replace              return return val

User · Answer

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

User · Answer

As of 3 6  probably works with slightly older 3 x as well   this is my solution   import locale locale setlocale locale LC ALL       def number format n  dec precision 4       precision   len str round n      dec precision     return format float n   f   precision n     The purpose of the precision calculation is to ensure we have enough precision to keep out of scientific notation  default precision is still 6    The dec precision argument adds additional precision to use for decimal points  Since this makes use of the n format  no insignificant zeros will be added  unlike f formats   n also will take care of rendering already-round integers without a decimal   n does require float input  thus the cast

User · Answer

Since this is the top result on Google  I will post here after failing to find a solution for my problem  If you are looking to format the display value of a float object and have it remain a float - not a string  you can use this solution   Create a new class that modifies the way that float values are displayed   from builtins import float class FormattedFloat float        def   str   self           return     10f   format self  rstrip  0     You can modify the precision yourself by changing the integer values in   f

[python] How to suppress scientific notation when printing float values?

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