Numba (software package)
| Numba | |
|---|---|
| Basic data
|
|
| Publishing year | 2012 |
| Current version | 0.49.1 (May 7, 2020) |
| Current preliminary version | 0.51.0dev0 (June 3, 2020) |
| operating system | Windows , macOS , Linux |
| programming language | Python, C. |
| category | Just-in-time compiler |
| License | BSD 2 Clause Simplified |
| https://github.com/numba/numba | |
The software package numba is a just-in-time compiler for Python that translates numerical functions into machine code , which speeds up the execution of these functions. Likewise, it allows for the parallel processing of NumPy - objects on multiple cores of the processor as well as the graphics card .
numba is based on LLVM and the Python package llvmlite.
The numba project was initiated by Travis Oliphant , co-founder of Anaconda Inc. Anaconda publishes the Python distribution of the same name ; Numba is mainly developed by Anaconda Inc. DARPA , Intel , nvidia and AMD support the project.
example
This program shows all prime numbers between 1 and 500,000. The only changes compared to normal Python code are the lines for importing the numba package and the decorator.
import numba
import math
# Sogenannter decorator; teilt mit, dass diese Funktion
# kompiliert werden soll - mit Angabe des Funktionsprototypen (die Funktion ist
# vom Typ boolean und erhält als Aufrufparameter einen uint32).
@numba.jit(numba.boolean(numba.uint32))
def isprime(n):
if n < 2:
return False # 0 und 1 sind keine Primzahlen.
if n == 2:
return True # 2 ist prim
if (n % 2) == 0:
return False # Modulo 2 wird gesondert behandelt.
# Es genuegt, Teiler bis Wurzel(n) zu testen.
divMax = math.floor(math.sqrt(n))
# Nur ungerade Zahlen als Teiler testen.
for divisor in range(3, divMax, 2):
if (n % divisor) == 0:
# Ein Teiler wurde gefunden, n kann keine Primzahl sein --> Abbruch
return False
# end if
# end for
return True # Kein Teiler gefunden, n ist prim.
# end method
for i in range(1, 500000):
if isprime(i):
print(i)
# end if
# end for
The runtime of this program is comparable to a variant programmed in C ++ .