Reading proper decimal values on lower numbers?

Hi,
I'm writing a script that exports the position of an object. In the process, I'm truncating them to only four decimals.
Wrote the a truncate function. It works but not on low numbers.For example,
Actual Position: Vector(0, 139.213, 93.26) XPosition: 2.42398958609e05 Resulting truncation: 2.4239
It turns out the script reads the
pseudo decimal
to an actual decimal. Is there a way to read the numbers as this0.0000242398958609
so the function works as expected or should I revise the function?Here is the current code:
def truncate(num): num_str = str(num) num = num_str.split(".") num_real = num[0] num_dec = num[1][:4] new_num_str = "{}.{}".format(num_real, num_dec) new_num = float(new_num_str) return new_num

Hi,
that your script is not working has not anything to do with
pseudo decimals
, but the fact that you are treating numbers as strings (which is generally a bad idea) in a not very careful manner. When you truncate the string representation of a number which is represented in scientific notation (with an exponent), then you also truncate that exponent and therefor change the value of the number.To truncate a
float
you can either take thefloor
ofmy_float * 10 ** digits
and then divide by10 ** digits
again or use the keywordround
.data = [0.03659665587738824, 0.00018878623163019122, 1.1076812650509394e03, 1.3882258325566638e06] for n in data: rounded = round(n, 4) floored = int(n * 10000) / 10000 print(n, rounded, floored) 0.03659665587738824 0.0366 0.0365 0.00018878623163019122 0.0002 0.0001 0.0011076812650509394 0.0011 0.0011 1.3882258325566637e06 0.0 0.0 [Finished in 0.1s]
Cheers
zipit 
RE: treating numbers as strings (which is generally a bad idea) in a not very careful manner.
THanks for the reminder. I initially thought I could get away with such a rudimetary approachRE: code
Interesting. Your algorithm is way more useful. Thanks for sharing. 
Hello,
Thanks again @zipit for the fast and nice reply
I also move this thread to general programming as it's not related to Cinema 4D
Cheers,
Manuel