Python Gdal: Count pixels having a specific range of values [closed]

Question

I have few hundred raster files and I want to count the number of pixels having values within a specific range. Following code works well when using == operator e.g., raster_file == 25, but gives totally wrong results when I use a range e.g., (raster_file >= 0) & (raster_file <= 25)

import os, sys
import numpy as np
import gdalnumeric
path = ('dir')
os.chdir(path)
for rasters in os.listdir(path):
    raster_file = gdalnumeric.LoadFile(rasters)
    pixel_count = ((raster_file =>0) & (raster_file <= 25)).sum()
    print(pixel_count)

Answer 1

Your syntax is incorrect, it should be:

((raster_file <=0) + (raster_file >= 25)).sum()