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{
"cells": [
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"cell_type": "markdown",
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"source": [
"# tiktoken (OpenAI) Length Function\n",
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"You can also use tiktoken, an open source tokenizer package from OpenAI to estimate tokens used. Will probably be more accurate for their models.\n",
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"\n",
"1. How the text is split: by character passed in\n",
"2. How the chunk size is measured: by `tiktoken` tokenizer"
]
},
{
"cell_type": "code",
"execution_count": 1,
"id": "1ad2d0f2",
"metadata": {},
"outputs": [],
"source": [
"# This is a long document we can split up.\n",
"with open('../../../state_of_the_union.txt') as f:\n",
" state_of_the_union = f.read()\n",
"from langchain.text_splitter import CharacterTextSplitter"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "825f7c0a",
"metadata": {},
"outputs": [],
"source": [
"text_splitter = CharacterTextSplitter.from_tiktoken_encoder(chunk_size=100, chunk_overlap=0)\n",
"texts = text_splitter.split_text(state_of_the_union)"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "ae35d165",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Madam Speaker, Madam Vice President, our First Lady and Second Gentleman. Members of Congress and the Cabinet. Justices of the Supreme Court. My fellow Americans. \n",
"\n",
"Last year COVID-19 kept us apart. This year we are finally together again. \n",
"\n",
"Tonight, we meet as Democrats Republicans and Independents. But most importantly as Americans. \n",
"\n",
"With a duty to one another to the American people to the Constitution.\n"
]
}
],
"source": [
"print(texts[0])"
]
}
],
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