can you share the code about how to sample the support set?

[ToneLi]

No description provided.

[thuan00]

hi, i've implemented the sampling method in the paper for personal purpose
hope its helpful for u too

import random

def sample_ner_data_struct_shot(samples, count_fn, k=1, random_state=None):
    """ sample or select a subset of samples with k
        using the sampling method from https://arxiv.org/abs/2010.02405
    Args:
        samples: list
        count_fn: input a sample, return a dict of {entity_type: count}
        k: number of entity instances for each entity type
    Returns:
        indices of the selected samples
        entity count of the selected samples
    """
    # count entities
    count = {} # total count
    samples_count = [] # count for each sample
    for sample in samples:
        sample_count = count_fn(sample)
        samples_count.append(sample_count)
        for e_type, e_count in sample_count.items():
            count[e_type] = count.get(e_type, 0) + e_count

    # sort by entity count, iterate from the infrequent entity to the frequent and sample
    entity_types = sorted(count.keys(), key=lambda k: count[k])
    selected_ids = set()
    selected_count = {k:0 for k in entity_types}
    random.seed(random_state)
    for entity_type in entity_types:
        while selected_count[entity_type] < k:
            samples_with_e = [i for i in range(len(samples)) if entity_type in samples_count[i] and i not in selected_ids]
            sample_id = random.choice(samples_with_e)
            selected_ids.add(sample_id)
            # update selected_count
            for e_type, e_count in samples_count[sample_id].items():
                selected_count[e_type] += e_count

    return list(selected_ids), selected_count



from collections import Counter

def count_entity_(sample):
    return Counter([slot['label'] for slot in sample['slots']])