mfcc.py

import librosa

sample_rate = 44100
mfcc_size = 13

# Load the audio
pcm_data, _ = librosa.load(file_path)

# Compute a vector of n * 13 mfccs
mfccs = librosa.feature.mfcc(pcm_data, 
                             sample_rate, 
                             n_mfcc=mfcc_size)

Maybe you should take the _ var for sample_rate instead of manually setting it.