I know Python // rounds towards negative infinity and in C++ / is truncating, rounding towards 0. And here’s what I know so far: But why Python // choose to round towards negative infinity? I didn’t find any resources explain that, but only find and hear people say vaguely: “for mathematics reasons”. For example, in Why is -1/2 evaluated to
Tag: rounding
Python: Round decimal places after seconds in timestamp
I have this series: Initially, I wanted to round to seconds by doing: However, I am trying to merge this dataset to another of higher frequency. So I’d like to round the decimal places of the timestamp instead. Example: 2021-06-15 16:23:04.388 would become 2021-06-15 16:23:04.380 How can I do this? to a timestamp? Answer If .388 should become .380 we
How can I turn off rounding in Spark?
I have a dataframe and I’m doing this: I want to get just the first four numbers after the dot, without rounding. When I cast to DecimalType, with .cast(DataTypes.createDecimalType(20,4) or even with round function, this number is rounded to 0.4220. The only way that I found without rounding is applying the function format_number(), but this function gives me a string,
Round to the next tens in Python
Is there a way to round always up to the next tens? E.g., 0.000000000003 shall become 0.1. 0.1244593249234 shall become 0.2 and 0.9x shall become 1. Negative numbers are not a thing here. Is there a built in or do I need to come up with something? Answer by multiplying the input f to 10, you will map it from
Fastest way to round random numbers in python
I want to generate random numbers up to certain precision, one at a time (so I am not looking for a vectorized solution). I found a method in this QnA on stackoverflow, and it gave me these benchmarks as promised. The method is definitely is almost twice as fast. Now, here’s what is puzzling me. Why is the above method
Check if the number is round, if not then round it
I have a little python project. Just for fun. There you can add when you want to shutdown your pc. At the beginning you can choose seconds/minutes/hours, and if you choose minutes than the input number* 60 will be in the “shutdown.exe /s /t …). (It’s only working with round numbers, even than 1.5*60 will be round at the end.)
Is there an python function or extension that is is similar to Matlab’s format short?
The command format short in Matlab makes all the print outs in the command window be “Short, fixed-decimal format with 4 digits after the decimal point.” I know there is np.round, but I would like to have this functionality that Matlab offers in python so I dont have to write round every time. This in order to get a better
Round a floating point number to n digits ignoring leading zeros and preserving them
Floating Point = 11.0000123456789 I want to round the above floating point number to 11.00001235. So I want the base portion of the float rounded to 4 digits while ignoring and preserving the leading zeros and adding back in the significand at the end. I have the following, it is short and sweet but feels a little bit like a
How does Python babel round numbers?
I’m building a financial website with the Flask framework and I’m currently writing unit tests for it. I’m using the Babel package to format money amounts and I hit upon rather strange rounding behaviour. I would expect rounding to be up in case of a 5, or to at least be consistent. But look at this: Why is this so,
How to round a number to significant figures in Python
I need to round a float to be displayed in a UI. e.g, to one significant figure: Is there a nice way to do this using the Python library, or do I have to write it myself? Answer You can use negative numbers to round integers: Thus if you need only most significant digit: You’ll probably have to take care