你可以在torchtext/data/utils.py文件中找到这个函数
我已经给出了官方代码和下面的文档
def interleave_keys(a, b):
"""Interleave bits from two sort keys to form a joint sort key.
Examples that are similar in both of the provided keys will have similar
values for the key defined by this function. Useful for tasks with two
text fields like machine translation or natural language inference.
"""
def interleave(args):
return ''.join([x for t in zip(*args) for x in t])
return int(''.join(interleave(format(x, '016b') for x in (a, b))), base=2)
更详细的解释将有助于理解它如何根据给定的两个字符串的相似程度返回一个整数。
而且里面使用的format函数是python中常用的内置函数