def main():
def print_stream_recent(s):
print s.name, " = ", s.recent[:s.stop]
y_stream = Stream('y stream')
z_stream = stream_func('list', mean_list, y_stream, 1, (0,0))
#z_stream = averages_stream(y_stream)
z_stream.set_name('z')
print_stream_recent(z_stream)
y_stream.extend([3, 5])
print_stream_recent(z_stream)
y_stream.extend([1, 11])
print_stream_recent(z_stream)
def averages_stream(input_stream):
# List function: list, state -> list, state
def averages_list(input_list, state):
number_of_values, sum_of_values = state
output_list = [0.0] * len(input_list)
for i,v in enumerate(input_list):
sum_of_values += v
number_of_values += 1
output_list[i] = sum_of_values/float(number_of_values)
state = number_of_values, sum_of_values
return (output_list, state)
return stream_func(
list_func=averages_list,
inputs=input_stream,
num_outputs=1,
state=(0, 0.0),
call_streams=None)
