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Python standard library: random
The random library is used to generate pseudo random numbers.
In order to create random numbers for cryptographic uses, the secrets module should be used.
Properties and methods import random
for e in sorted(dir(random), key=lambda s: s.lower()): print(e)
__all__ __builtins__ __cached__ __doc__ __file__ __loader__ __name__ __package__ __spec__ _accumulate _acos _bisect _ceil _cos _e _exp _floor _index _inst _isfinite _log _ONE _os _pi _random _repeat _Sequence _Set _sha512 _sin _sqrt _test _test_generator _urandom _warn betavariate BPF choice Choose a random element from a sequence. choices expovariate gammavariate gauss getrandbits getstate The current internal state of the generator. The returned object can be passed to setstate. LOG4 lognormvariate normalvariate NV_MAGICCONST paretovariate randbytes Generate n random bytes. randint Random random Generate a uniformly distributed random float in the range 0 <= X < 1 using Mersenne Twister . randrange RECIP_BPF sample seed setstate SG_MAGICCONST shuffle SystemRandom triangular TWOPI uniform vonmisesvariate weibullvariate
random()
random.random() returns a random number in the range 0 … 1.
import random
random.seed('tq84')
for _ in range(10):
print(random.random())
#
# 0.15919424924070613
# 0.4948802376988537
# 0.6212905728914367
# 0.5917838981303569
# 0.9762144093757996
# 0.22690315108652592
# 0.27237380613393625
# 0.6180574649914569
# 0.34173704578994535
# 0.7690121980201846
choice
random.choice(seq) returns a random element from a sequence.
#!/usr/bin/python3
import random
lst = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
for i in range(0, 10):
print(random.choice(lst))
sample
import random
#
# Choose two (distinct) random fruits, in random order:
#
for fruit in random.sample( ['apple', 'pear', 'orange', 'cherry', 'banana'], 2):
print(fruit)