Problem In calling a Function from another python file of project

[vinod2810]

I am posting my digital filter code below:

from scipy import signal
from EEG import eeg_data
import array as arr


sample_rate = 250
nyquist_rate = sample_rate/2

gMax_Blocks = 32
gMax_Samples = 8
gMax_Channel = 4

# Cofficient for IIR filters
b2 = arr.array('d',[0.965080986344733, -0.242468320175764, 1.94539149412878, -0.242468320175764, 0.965080986344733])
a2 = arr.array('d',[1, -0.246778261129785, 1.94417178469135, -0.238158379221743, 0.931381682126902])
b = arr.array('d',[0.200138725658073, 0, -0.400277451316145, 0, 0.200138725658073])
a = arr.array('d',[1, -2.35593463113158, 1.94125708865521, -0.784706375533419, 0.199907605296834])



def apply_filter():
    fc = 0.5  # Cut-off frequency of the filter
    w = fc / (sample_rate / 2)  # Normalize the frequency
    b, a = signal.butter(2, w, 'high')
    for  line in eeg_data:
        output = arr.arry('d',[signal.filtfilt(b, a, line)])