Parallel Python

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parallelpython
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Mittwoch 3. Januar 2007, 06:29

Does anybody have any experience with parallel python?
Recently I've made Parallel Python for SMP
I would appreciate any comments/suggestions regarding it.
Thank you!
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Leonidas
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Mittwoch 3. Januar 2007, 12:48

Hi parallelpython, welcome in the forum!

Is it your project? There are examples but I don't see any documentation how it works under the hood.

Anyway, testing for type in the isPrime example is not considered good style.
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sape
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Mittwoch 3. Januar 2007, 14:03

Leonidas hat geschrieben:[...]
Anyway, testing for type in the isPrime example is not considered good style.
Yes ^^

isinstance(n, int):

Code: Alles auswählen

def isPrime(n):
    """Returns True if n is prime and False otherwise"""
    if not isinstance(n, int) or n < 2:
        return False
    elif n == 2:
        return True
    max = int(math.ceil(math.sqrt(n)))
    i = 2
    while i <= max:
        if n % i == 0:
            return False
        i += 1
    return True
Much better:

Code: Alles auswählen

def isPrime(n):
    if not isinstance(n, int):
        raise TypeError("n is not from data type int or long")

    if n < 2:
        return False
# etc.
BTW: The name of the function is not conform with the PEP8 Style Guide. ``is_prime`` ist better as ``isPrime`` :)

lg

P.S.: Sorry for my very bad english.
parallelpython
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Donnerstag 4. Januar 2007, 01:58

Leonidas hat geschrieben:Hi parallelpython, welcome in the forum!

Is it your project?
Hi Leonidas,
Yes, it is my project.
Leonidas hat geschrieben: There are examples but I don't see any documentation how it works under the hood.
In short, it creates worker processes which may run on different cpus/cores.
These processes execute jobs in parallel.
Zuletzt geändert von parallelpython am Donnerstag 4. Januar 2007, 02:12, insgesamt 2-mal geändert.
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parallelpython
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Donnerstag 4. Januar 2007, 02:09

sape hat geschrieben: Much better:

Code: Alles auswählen

def isPrime(n):
    if not isinstance(n, int):
        raise TypeError("n is not from data type int or long")
BTW: The name of the function is not conform with the PEP8 Style Guide. ``is_prime`` ist better as ``isPrime`` :)
Thank you for the feedback!
I've changed the examples section.
I guess isprime will be even better here (analogous to isinstance)
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