This question already has answers here:
Limiting floats to two decimal points
(35 answers)
how to format float number in python? [duplicate]
(3 answers)
variable number of digit in format string
(3 answers)
Closed 1 year ago.
I'm reading this textbook called "Practical Statistics for Data Scientists" and this :.3f keeps getting used in almost every f-string. What does :.3f mean? My guess is it has something to do with floating point numbers.
Example:
{house_lm_factor.intercept_:.3f}
This is show you how many number are printing:
>>> import math
>>> flt = math.pi
>>> f'{flt:.3f}'
'3.142'
>>> f'{flt:.5f}'
'3.14159'
>>> f'{flt:.10f}'
'3.1415926536'
Related
This question already has answers here:
Convert string (in scientific notation) to float
(4 answers)
Closed 9 months ago.
How can I parse a character string that represents a scientific number into a numeric number?
>>> float('5e-04')
0.0005
This question already has an answer here:
Python 3 integer division [duplicate]
(1 answer)
Closed 2 years ago.
if I use integer type cast conversion technique then it doesn't work for large numbers like 12630717197566440063
I got wrong answer in some cases like below in python 3
a =12630717197566440063;
print(a)
temp = a/10
print(int(temp))
Then I am getting 1263071719756644096 as a answer instead of 1263071719756644006
You can use the // (floor division) operator:
temp = a//10
print(temp)
This question already has answers here:
Round to 5 (or other number) in Python
(21 answers)
How do I round to the nearest 0.5?
(10 answers)
Closed 2 years ago.
I got this number 1.12412 and I want to round it to 1.12415 or 1.12410 (muliple of 5 in last decimal)
If using the Round(X,4) function I get 1.1241 (4 decimals).
Is there a function that can make that happen?
Thanks!
There is an answer in stack but using c# not python
My way to do that is to specify rounding unit first and then simple trick as below:
import numpy as np
rounding_unit = 0.00005
np.round(1.12412/rounding_unit) * rounding_unit
You may:
Multiply your number by 2
Use Round(X,4)
Divide the result by 2
profit!!!
This question already has answers here:
Display a decimal in scientific notation
(13 answers)
Closed 3 years ago.
I have this:
print('bionumbers:',bionumbers)
which outputs:
bionumbers: 9381343483.4
How can I output this value in exponent notation?
Using Python3 format syntax :
print(f'bionumbers: {bionumbers:e}')
This question already has answers here:
How to round a number to significant figures in Python
(26 answers)
Closed 6 years ago.
How do I string format, either % or .format(), a float to round and display to the 10s or 100s place?
Like 4552.33 to 4550 to 10s place or 4600 to 100s?
Use the built-in function round,
>>> import math
>>> f = 4552.33
>>> int(round(f, -int(math.log10(10))))
4550
>>> int(round(f, -int(math.log10(100))))
4600