Re: Jak zrobić test za pomocą PractRand?

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#217547

From: osobli...
Date: Tue, 24 Aug 2021 14:20

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wtorek, 24 sierpnia 2021 o 11:46:47 UTC+2 M.M. napisał(a):
> On Tuesday, August 24, 2021 at 1:43:54 AM UTC+2, osobli...@gmail.com wrote: 
> > To też nie działa: 
> > 
> > def to_bytes(num, size): 
> > x = num if num >= 0 else 256**size + num 
> > h = hex(x)[2:].rstrip("L") 
> > return binascii.unhexlify("0"*((2*size)-len(h))+h) 
> > 
> > Wyniki, które otrzymuję są podobne do tego, który podano w przykładzie: 
> > 
> > \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' 
> > 
> > Oznacza, to, że prawie na pewno konwertuję dane dobrze. Problem jest nadal z przekazaniem tego do PractRand. Nie wiem, czy używam poprawnie: 
> > 
> > sys.stdout.buffer.write(binary) 
> > 
> > Skoro nie działa, ale z tego co widzę może tam być po prostu zmienna w nawiasach, więc nie powinno być problemu. Standardowy print zarówno ze znakami nowej linii, jak i bez nie działa. Nie sądzę, że tutaj też jest nadal jakiś błąd. Wydaje mi się, że dane są wciąż źle podawane. 
> > 
> > Jak podaje dane program: 
> > 
> > #include <cstdio> 
> > #include <cstdint> 
> > 
> > #include <random> 
> > 
> > int main() 
> > { 
> > freopen(NULL, "wb", stdout); // Only necessary on Windows, but harmless. 
> > 
> > std::mt19937 rng(42); 
> > 
> > while (1) { 
> > uint32_t value = rng(); 
> > fwrite((void*) &value, sizeof(value), 1, stdout); 
> > } 
> > } 
> > 
> > https://www.pcg-random.org/posts/how-to-test-with-practrand.html 
> > 
> > I czym to się różni od mojego sposobu?
> Nie wiem, ale u mnie działa: 
> 
> cat test.py 
> import sys 
> import struct 
> 
> class SimpPRNG: 
> x = 0
> A = 79908886691 
> B = 8143076871913
> def __init__( self, seed ): 
> self.x = seed 
> for i in range(1,100): 
> self.g() 
> 
> def g(self): 
> self.x = (self.x * self.A + self.B) & (2**128-1) 
> return self.x >> 123 
> 
> r = SimpPRNG( 1 ) 
> buf = 0 
> s = 0 
> while True: 
> t = r.g() 
> for i in range(1,5): 
> buf = buf << 1 
> buf = buf | (t & 1) 
> t = t >> 1 
> s = s + 1 
> if s == 32: 
> sys.stdout.write( struct.pack('I', buf) ) 
> s = 0 
> buf = 0 
> 
> 
> python test.py | ../c/PractRand/RNG_test stdin
> RNG_test using PractRand version 0.94 
> RNG = RNG_stdin, seed = unknown
> test set = core, folding = standard(unknown format) 
> 
> rng=RNG_stdin, seed=unknown 
> length= 512 kilobytes (2^19 bytes), time= 2.7 seconds 
> no anomalies in 84 test result(s) 
> 
> rng=RNG_stdin, seed=unknown 
> length= 1 megabyte (2^20 bytes), time= 5.8 seconds 
> no anomalies in 94 test result(s) 
> 
> rng=RNG_stdin, seed=unknown 
> length= 2 megabytes (2^21 bytes), time= 11.5 seconds 
> no anomalies in 109 test result(s) 
> 
> rng=RNG_stdin, seed=unknown 
> length= 4 megabytes (2^22 bytes), time= 22.7 seconds 
> no anomalies in 124 test result(s) 
> 
> rng=RNG_stdin, seed=unknown 
> length= 8 megabytes (2^23 bytes), time= 44.5 seconds
> no anomalies in 135 test result(s) 
> 
> rng=RNG_stdin, seed=unknown
> length= 16 megabytes (2^24 bytes), time= 87.8 seconds
> no anomalies in 151 test result(s)
> ^CTraceback (most recent call last): 
> File "test.py", line 30, in <module> 
> t = t >> 1 
> KeyboardInterrupt 
> 
> Pozdrawim

U mnie sys.stdout.write(struct.pack('I', buf)) od razu podświetla się jako błąd. Po uruchomieniu:

TypeError: write() argument must be str, not bytes

Gdy zrobię z argumentu stringa sys.stdout.write(str(struct.pack('I', buf))), to oczywiście oblewa. Trzeba tam jeszcze coś prawdopodobnie dodać, żeby to write działało w trybie binarnym.

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Subject: Re: Jak zrobić test za pomocą
 PractRand?
From: "osobli...@gmail.com" <osobliwy.nick@gmail.com>
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