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import numpy
def delta_decode(in_array):
"""A function to delta decode an int array.
:param in_array: the input array of integers
:return the decoded array"""
return in_array.cumsum()
def run_length_decode(in_array):
"""A function to run length decode an int array.
:param in_array: the input array of integers
:return the decoded array"""
switch=False
out_array=[]
in_array = in_array.tolist()
for item in in_array:
if switch==False:
this_item = item
switch=True
else:
switch=False
out_array.extend([this_item]*int(item))
return numpy.asarray(out_array, dtype=numpy.int32)
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