python - How to convert a decimal number into fraction? -

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I was wondering how to convert a decimal to its lowest form in Python in its lowest form.

Example: 

  0.25 - & gt; 1/4 0.5 - & gt; 1/2 1.25 - & gt; 5/4 3 - & gt; 3/1

You have two options:

    < Li>

    Use: 

      & gt; & Gt; & Gt;   
  1.   P> Use it:  
      & gt; & Gt; & Gt; Fractions from Fractions & gt; & Gt; & Gt; Fraction (0.25) fraction (1, 4)  
     
    2.

is very helpful in the latter str () conversion:

& gt; & Gt; & Gt; Str (fraction (0.25)) '1/4'> gt; & Gt; & Gt; Print fractions (0.25) 1/4

Because floating point variants may be incomplete, you can eliminate 'weird' fractions; Limit everything to 'smooth' part to a certain extent: 

  & gt; & Gt; & Gt; Fraction (0.185) degree (3332663724254167, 1801439850 9 481984)> gt; & Gt; & Gt; Fraction (0.185) .limit_denominator () fraction (37, 200)

If you are using Python 2.6, then fraction () to pass so far Does not support directly in a float , but you can combine two technologies in the top: 

  fraction (* 0.25.as_integer_ratio ())

or you can use it only: 

  Fraction.from_float (0.25)

Which essentially does the same thing, like take the integer ratio tube And pass it as two different arguments.

And a small demo with your sample values: 

  gt; & Gt; In F (0.25, 0.5, 1.25, 3.0): ... print f.as_integer_ratio () ... print repr (calibration (f)), fraction (f) ... (1, 4) fraction (1, 4) ) 1/4 (1, 2) fraction (1, 2) 1/2 (5, 4) fraction (5, 4) 5/4 (3, 1) fraction (3, 1) 3  << / P>

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