File: urandom_basic.py

package info (click to toggle)
giac 1.9.0.35%2Bdfsg2-1.1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 113,448 kB
  • sloc: cpp: 394,793; ansic: 200,527; python: 30,548; javascript: 28,735; makefile: 8,328; yacc: 2,690; lex: 2,458; sh: 623; perl: 314; lisp: 216; asm: 62; java: 41; xml: 36; sed: 16; csh: 7; pascal: 6
file content (29 lines) | stat: -rw-r--r-- 658 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
try:
    import urandom as random
except ImportError:
    try:
        import random
    except ImportError:
        print("SKIP")
        raise SystemExit

# check getrandbits returns a value within the bit range
for b in (1, 2, 3, 4, 16, 32):
    for i in range(50):
        assert random.getrandbits(b) < (1 << b)

# check that seed(0) gives a non-zero value
random.seed(0)
print(random.getrandbits(16) != 0)

# check that PRNG is repeatable
random.seed(1)
r = random.getrandbits(16)
random.seed(1)
print(random.getrandbits(16) == r)

# check that it throws an error for zero bits
try:
    random.getrandbits(0)
except ValueError:
    print('ValueError')