sox get frequency info

from subprocess import check_output
import sys
import os
def rough_frequency_check(file):
    freq = str(check_output('sox \"' +file+ '\" -n stat 2>&1 |findstr "Rough   frequency" ',shell=True))   #Windows
#    RMS = str(check_output('sox \"' +file+ '\" -n stat 2>&1 |grep "RMS" ',shell=True)) #ubuntu
    freq=freq.split(":")[1]
    freq=freq.split("\\")[0]
    freq=int(freq)
#     freq=round(freq,5)
#     print('Name of file is:',file)
#     print('Rough frequencies in file : ',freq)
    return freq