How to format a float with a maximum number of decimal places and without extra zero padding?
padding, python, string-formatting
Solution
What you're asking for should be addressed by rounding methods like the built-in `round` function. Then let the `float` number be naturally displayed with its `string` representation.
>>> round(65.53, 4) # num decimal <= precision, do nothing
'65.53'
>>> round(40.355435, 4) # num decimal > precision, round
'40.3554'
>>> round(0, 4) # note: converts int to float
'0.0'
Problem
I need to do some decimal place formatting in python. Preferably, the floating point value should always show at least a starting 0 and one decimal place. Example: ``` Input: 0 Output: 0.0 ``` Values with more decimal places should continue to show them, until it gets 4 out. So: ``` Input: 65.53 Output: 65.53 Input: 40.355435 Output: 40.3554 ``` I know that I can use {0.4f} to get it to print out to four decimal places, but it will pad with unwanted 0s. Is there a formatting code to tell it to print out up to a certain number of decimals, but to leave them blank if there is no data? I believe C# accomplishes this with something like: ``` floatValue.ToString("0.0###") ``` Where the # symbols represent a place that can be left blank.