How to use the mediapipe.util.sequence.media_sequence_util.create_float_context_feature function in mediapipe

def _create_image_with_prefix(name, prefix):
  """Create multiple accessors for image based data."""
  msu.create_bytes_context_feature(name + "_format", IMAGE_FORMAT_KEY,
                                   prefix=prefix, module_dict=globals())
  msu.create_bytes_context_feature(name + "_colorspace", IMAGE_COLORSPACE_KEY,
                                   prefix=prefix, module_dict=globals())
  msu.create_int_context_feature(name + "_channels", IMAGE_CHANNELS_KEY,
                                 prefix=prefix, module_dict=globals())
  msu.create_int_context_feature(name + "_height", IMAGE_HEIGHT_KEY,
                                 prefix=prefix, module_dict=globals())
  msu.create_int_context_feature(name + "_width", IMAGE_WIDTH_KEY,
                                 prefix=prefix, module_dict=globals())
  msu.create_bytes_feature_list(name + "_encoded", IMAGE_ENCODED_KEY,
                                prefix=prefix, module_dict=globals())
  msu.create_float_context_feature(name + "_frame_rate", IMAGE_FRAME_RATE_KEY,
                                   prefix=prefix, module_dict=globals())
  msu.create_bytes_list_context_feature(
      name + "_class_label_string", IMAGE_CLASS_LABEL_STRING_KEY,
      prefix=prefix, module_dict=globals())
  msu.create_int_list_context_feature(
      name + "_class_label_index", IMAGE_CLASS_LABEL_INDEX_KEY,
      prefix=prefix, module_dict=globals())
  msu.create_int_list_context_feature(
      name + "_object_class_index", IMAGE_OBJECT_CLASS_INDEX_KEY,
      prefix=prefix, module_dict=globals())
  msu.create_bytes_context_feature(name + "_data_path", IMAGE_DATA_PATH_KEY,
                                   prefix=prefix, module_dict=globals())
  msu.create_int_feature_list(name + "_timestamp", IMAGE_TIMESTAMP_KEY,
                              prefix=prefix, module_dict=globals())
  msu.create_bytes_list_feature_list(name + "_multi_encoded",
                                     IMAGE_MULTI_ENCODED_KEY, prefix=prefix,

# The timestamp, in microseconds, of the feature.
FEATURE_TIMESTAMP_KEY = "feature/timestamp"
# It is occasionally useful to indicate that a feature applies to a given range.
# This should be used for features only and annotations should be provided as
# segments.
FEATURE_DURATION_KEY = "feature/duration"
# Encodes an optional confidence score for the generated features.
FEATURE_CONFIDENCE_KEY = "feature/confidence"

msu.create_int_list_context_feature(
    "feature_dimensions", FEATURE_DIMENSIONS_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_rate", FEATURE_RATE_KEY, module_dict=globals())
msu.create_bytes_context_feature(
    "feature_bytes_format", FEATURE_BYTES_FORMAT_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_sample_rate", FEATURE_SAMPLE_RATE_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_channels", FEATURE_NUM_CHANNELS_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_samples", FEATURE_NUM_SAMPLES_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_packet_rate", FEATURE_PACKET_RATE_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_audio_sample_rate", FEATURE_AUDIO_SAMPLE_RATE_KEY,
    module_dict=globals())
msu.create_float_list_feature_list(
    "feature_floats", FEATURE_FLOATS_KEY, module_dict=globals())
msu.create_bytes_list_feature_list(
    "feature_bytes", FEATURE_BYTES_KEY, module_dict=globals())
msu.create_int_list_feature_list(
    "feature_ints", FEATURE_INTS_KEY, module_dict=globals())

# Encodes an optional confidence score for the generated features.
FEATURE_CONFIDENCE_KEY = "feature/confidence"

msu.create_int_list_context_feature(
    "feature_dimensions", FEATURE_DIMENSIONS_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_rate", FEATURE_RATE_KEY, module_dict=globals())
msu.create_bytes_context_feature(
    "feature_bytes_format", FEATURE_BYTES_FORMAT_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_sample_rate", FEATURE_SAMPLE_RATE_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_channels", FEATURE_NUM_CHANNELS_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_samples", FEATURE_NUM_SAMPLES_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_packet_rate", FEATURE_PACKET_RATE_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_audio_sample_rate", FEATURE_AUDIO_SAMPLE_RATE_KEY,
    module_dict=globals())
msu.create_float_list_feature_list(
    "feature_floats", FEATURE_FLOATS_KEY, module_dict=globals())
msu.create_bytes_list_feature_list(
    "feature_bytes", FEATURE_BYTES_KEY, module_dict=globals())
msu.create_int_list_feature_list(
    "feature_ints", FEATURE_INTS_KEY, module_dict=globals())
msu.create_int_feature_list(
    "feature_timestamp", FEATURE_TIMESTAMP_KEY, module_dict=globals())
msu.create_int_list_feature_list(
    "feature_duration", FEATURE_DURATION_KEY, module_dict=globals())
msu.create_float_list_feature_list(
    "feature_confidence", FEATURE_CONFIDENCE_KEY, module_dict=globals())

# The feature as a list of bytes. May be encoded.
FEATURE_BYTES_KEY = "feature/bytes"
# The feature as a list of ints.
FEATURE_INTS_KEY = "feature/ints"
# The timestamp, in microseconds, of the feature.
FEATURE_TIMESTAMP_KEY = "feature/timestamp"
# It is occasionally useful to indicate that a feature applies to a given range.
# This should be used for features only and annotations should be provided as
# segments.
FEATURE_DURATION_KEY = "feature/duration"
# Encodes an optional confidence score for the generated features.
FEATURE_CONFIDENCE_KEY = "feature/confidence"

msu.create_int_list_context_feature(
    "feature_dimensions", FEATURE_DIMENSIONS_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_rate", FEATURE_RATE_KEY, module_dict=globals())
msu.create_bytes_context_feature(
    "feature_bytes_format", FEATURE_BYTES_FORMAT_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_sample_rate", FEATURE_SAMPLE_RATE_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_channels", FEATURE_NUM_CHANNELS_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_samples", FEATURE_NUM_SAMPLES_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_packet_rate", FEATURE_PACKET_RATE_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_audio_sample_rate", FEATURE_AUDIO_SAMPLE_RATE_KEY,
    module_dict=globals())
msu.create_float_list_feature_list(
    "feature_floats", FEATURE_FLOATS_KEY, module_dict=globals())

msu.create_int_list_context_feature(
    "feature_dimensions", FEATURE_DIMENSIONS_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_rate", FEATURE_RATE_KEY, module_dict=globals())
msu.create_bytes_context_feature(
    "feature_bytes_format", FEATURE_BYTES_FORMAT_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_sample_rate", FEATURE_SAMPLE_RATE_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_channels", FEATURE_NUM_CHANNELS_KEY, module_dict=globals())
msu.create_int_context_feature(
    "feature_num_samples", FEATURE_NUM_SAMPLES_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_packet_rate", FEATURE_PACKET_RATE_KEY, module_dict=globals())
msu.create_float_context_feature(
    "feature_audio_sample_rate", FEATURE_AUDIO_SAMPLE_RATE_KEY,
    module_dict=globals())
msu.create_float_list_feature_list(
    "feature_floats", FEATURE_FLOATS_KEY, module_dict=globals())
msu.create_bytes_list_feature_list(
    "feature_bytes", FEATURE_BYTES_KEY, module_dict=globals())
msu.create_int_list_feature_list(
    "feature_ints", FEATURE_INTS_KEY, module_dict=globals())
msu.create_int_feature_list(
    "feature_timestamp", FEATURE_TIMESTAMP_KEY, module_dict=globals())
msu.create_int_list_feature_list(
    "feature_duration", FEATURE_DURATION_KEY, module_dict=globals())
msu.create_float_list_feature_list(
    "feature_confidence", FEATURE_CONFIDENCE_KEY, module_dict=globals())