landsat 8 python library

read the true color

def landsat8_rgb_show(file_path):
    """
    show the true color of landsat 8
    file_path: the path of the true color file
    """
    file_name = os.path.join(file_path, os.path.basename(file_path) + ".tif")
    raster_rgb_array = plt.imread(file_name)
    plt.imshow(raster_rgb_array)
    plt.show()

calculate the metadata of Lansat-8:

def landsat8_read_meta(file_path, show_flag=False):
    file_name = os.path.basename(file_path)[:42] + "_MTL" ".txt"
    file_name = os.path.join(file_path, os.path.basename(file_path), file_name)
    i = 0
    metadata = {}
    with open(file_name, "r") as mtl_obj:
        data = mtl_obj.readline()
        cur_first_key = data.split(" = ")[1].split("\n")[0]
        metadata[cur_first_key] = {}
        while data[:9] != "END_GROUP":
            i = i + 1
            data = mtl_obj.readline()
            cur_sec_key = data.split(" = ")[1].split("\n")[0]
            metadata[cur_first_key][cur_sec_key] = {}
            data = mtl_obj.readline()
            if data == "END\n":
                break
            while data[:11] != "  END_GROUP":
                meta_key = data.split("    ")[1].split(" = ")
                if meta_key[1].find("\"") != -1:
                    metadata[cur_first_key][cur_sec_key][meta_key[0]] = meta_key[1].split("\"")[1]
                else:
                    if meta_key[0] == "FILE_DATE":
                        metadata[cur_first_key][cur_sec_key][meta_key[0]] = meta_key[1].split("\n")[0]
                    else:
                        metadata[cur_first_key][cur_sec_key][meta_key[0]] = meta_key[1].split("\n")[0]
                data = mtl_obj.readline()
                i = i + 1
                if i > 3000:
                    return
    if show_flag:
        for key in metadata.keys():
            metadata_sec = metadata[key]
            for key_sec in metadata_sec.keys():
                print("\t" + key_sec)
                metadata_third = metadata_sec[key_sec]
                for key_third in metadata_third.keys():
                    print("\t\t" + key_third + "\t:\t" + metadata_third[key_third])
    return metadata