mirror of
https://github.com/hwchase17/langchain.git
synced 2025-07-02 19:34:04 +00:00
Add language detection example (#10540)
### Description Adds language detection examples based on [langdetect](https://github.com/Mimino666/langdetect/tree/master/langdetect) and [fasttext](https://github.com/facebookresearch/fastText/) libraries. These frameworks can be especially useful together with components that require selection of the language (e.g. data-anonymizer) ### Twitter handle @deepsense_ai, @matt_wosinski
This commit is contained in:
Mateusz Wosinski
GitHub
parent
31d5bd84d7
commit
656480feb6
@ -44,7 +44,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"execution_count": 1,
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"metadata": {},
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"outputs": [],
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"source": [
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@ -66,7 +66,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"execution_count": 10,
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"metadata": {},
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"outputs": [
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{
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@ -75,7 +75,7 @@
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"'Me llamo Sofía'"
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]
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},
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"execution_count": 3,
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"execution_count": 10,
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"metadata": {},
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"output_type": "execute_result"
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}
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@ -93,16 +93,16 @@
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"execution_count": 11,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"'Bridget Kirk soy Sally Knight'"
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"'Kari Lopez soy Mary Walker'"
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]
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},
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"execution_count": 4,
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"execution_count": 11,
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"metadata": {},
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"output_type": "execute_result"
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}
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@ -131,7 +131,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 6,
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"execution_count": 2,
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"metadata": {},
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"outputs": [],
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"source": [
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@ -157,15 +157,15 @@
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},
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{
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"cell_type": "code",
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"execution_count": 7,
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Me llamo Michelle Smith\n",
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"Yo soy Rachel Wright\n"
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"Me llamo Christopher Smith\n",
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"Yo soy Joseph Jenkins\n"
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]
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}
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],
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@ -190,14 +190,14 @@
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"execution_count": 14,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"My name is Ronnie Ayala\n"
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"My name is Shawna Bennett\n"
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]
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}
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],
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@ -205,6 +205,218 @@
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"print(anonymizer.anonymize(\"My name is John\"))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Usage with other frameworks\n",
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"\n",
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"### Language detection\n",
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"\n",
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"One of the drawbacks of the presented approach is that we have to pass the **language** of the input text directly. However, there is a remedy for that - *language detection* libraries.\n",
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"\n",
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"We recommend using one of the following frameworks:\n",
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"- fasttext (recommended)\n",
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"- langdetect\n",
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"\n",
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"From our exprience *fasttext* performs a bit better, but you should verify it on your use case."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"# Install necessary packages\n",
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"# ! pip install fasttext langdetect"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### langdetect"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 7,
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"metadata": {},
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"outputs": [],
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"source": [
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"import langdetect\n",
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"from langchain.schema import runnable\n",
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"\n",
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"def detect_language(text: str) -> dict:\n",
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" language = langdetect.detect(text)\n",
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" print(language)\n",
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" return {\"text\": text, \"language\": language}\n",
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"\n",
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"\n",
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"chain = (\n",
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" runnable.RunnableLambda(detect_language)\n",
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" | (lambda x: anonymizer.anonymize(x[\"text\"], language=x[\"language\"]))\n",
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")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 15,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"es\n"
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]
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},
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{
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"data": {
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"text/plain": [
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"'Me llamo Michael Perez III'"
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]
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},
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"execution_count": 15,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"chain.invoke(\"Me llamo Sofía\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 12,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"en\n"
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]
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},
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{
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"data": {
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"text/plain": [
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"'My name is Ronald Bennett'"
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]
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},
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"execution_count": 12,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"chain.invoke(\"My name is John Doe\")"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### fasttext"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"You need to download the fasttext model first from https://dl.fbaipublicfiles.com/fasttext/supervised-models/lid.176.ftz"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 18,
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"metadata": {},
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"outputs": [
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{
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"name": "stderr",
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"output_type": "stream",
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"text": [
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"Warning : `load_model` does not return WordVectorModel or SupervisedModel any more, but a `FastText` object which is very similar.\n"
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]
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}
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],
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"source": [
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"import fasttext\n",
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"\n",
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"model = fasttext.load_model(\"lid.176.ftz\")\n",
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"def detect_language(text: str) -> dict:\n",
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" language = model.predict(text)[0][0].replace('__label__', '')\n",
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" print(language)\n",
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" return {\"text\": text, \"language\": language}\n",
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"\n",
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"chain = (\n",
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" runnable.RunnableLambda(detect_language)\n",
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" | (lambda x: anonymizer.anonymize(x[\"text\"], language=x[\"language\"]))\n",
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")\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 21,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"es\n"
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]
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},
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{
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"data": {
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"text/plain": [
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"'Yo soy Angela Werner'"
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]
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},
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"execution_count": 21,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"chain.invoke(\"Yo soy Sofía\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 20,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"en\n"
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]
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},
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{
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"data": {
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"text/plain": [
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"'My name is Carlos Newton'"
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]
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},
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"execution_count": 20,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"chain.invoke(\"My name is John Doe\")"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"This way you only need to initialize the model with the engines corresponding to the relevant languages, but using the tool is fully automated."
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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@ -485,15 +697,6 @@
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"source": [
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"In many cases, even the larger models from spaCy will not be sufficient - there are already other, more complex and better methods of detecting named entities, based on transformers. You can read more about this [here](https://microsoft.github.io/presidio/analyzer/nlp_engines/transformers/)."
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Future works\n",
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"\n",
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"- **automatic language detection** - instead of passing the language as a parameter in `anonymizer.anonymize`, we could detect the language/s beforehand and then use the corresponding NER model."
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]
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}
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],
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"metadata": {
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@ -512,7 +715,7 @@
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.9.1"
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"version": "3.9.16"
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}
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},
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"nbformat": 4,
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