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"""The expyriment randomize module.
This module contains various functions for randomizing data
"""
__author__ = 'Florian Krause <florian@expyriment.org>,\
Oliver Lindemann <oliver@expyriment.org>'
__version__ = '0.7.0'
__revision__ = '55a4e7e'
__date__ = 'Wed Mar 26 14:33:37 2014 +0100'
from copy import copy as _copy
import random as _random
_random.seed()
def rand_int_sequence(first_elem, last_elem):
"""Return a randomised sequence of integers in given range.
Parameters
----------
first_elem : int
first element of the range
last_elem : int
last element of the range
Results
-------
rnd_seq : list
randomised sequence of integers in given range
"""
list_ = range(first_elem, last_elem + 1)
_random.shuffle(list_)
return list_
def rand_int(a, b):
"""Return random integer in given range.
Parameters
----------
a : int
first element of range
b : int
last element of range
Results
-------
rnd : int
"""
return _random.randint(a, b)
def rand_element(list_):
"""Return a random element from a list
Parameter
---------
list_ : list
Results
-------
elem : a random element from the list
"""
return list_[_random.randint(0, len(list_) - 1)]
def coin_flip():
"""Return randomly True or False.
Returns
-------
rnd : bool
"""
if _random.randint(1, 2) == 1:
return True
else:
return False
def shuffle_list(list_):
"""Shuffle any list of objects.
Parameters
----------
list_ : int
list to shuffle
"""
_random.shuffle(list_)
def make_multiplied_shuffled_list(list_, xtimes):
"""Return the multiplied and shuffled (sectionwise) list.
The function manifolds the list 'xtimes' and shuffles each
and concatenates to the return new lists.
Parameters
----------
list_ : list
list to be shuffled
xtimes : int
how often the list will be multiplied
"""
newlist = []
tmp = _copy(list_)
for _i in range(0, xtimes):
_random.shuffle(tmp)
newlist.extend(tmp)
return newlist
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