Simple Directory Reader¶
SimpleDirectoryReader 是最常用的数据连接器，它开箱即用。
只需传入一个输入目录或一个文件列表。
它将根据文件扩展名选择最佳的文件读取器。
入门¶
如果您在 Colab 上打开此 Notebook，您可能需要安装 LlamaIndex 🦙。
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已复制！
!pip install llama-index
!pip install llama-index
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fastapi>=0.95.2->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (0.36.3) Requirement already satisfied: filelock in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from huggingface_hub<1.0,>=0.16.4->tokenizers<0.16.0,>=0.15.1->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (3.13.1) Requirement already satisfied: google-auth>=1.0.1 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from kubernetes>=28.1.0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (2.28.0) Requirement already satisfied: websocket-client!=0.40.0,!=0.41.*,!=0.42.*,>=0.32.0 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from 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opentelemetry-instrumentation-asgi==0.43b0->opentelemetry-instrumentation-fastapi>=0.41b0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (3.7.2) Requirement already satisfied: monotonic>=1.5 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from posthog>=2.4.0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (1.6) Requirement already satisfied: httptools>=0.5.0 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from uvicorn[standard]>=0.18.3->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (0.6.1) Requirement already satisfied: python-dotenv>=0.13 in 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/Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from uvicorn[standard]>=0.18.3->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (12.0) Requirement already satisfied: humanfriendly>=9.1 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from coloredlogs->onnxruntime<2.0.0,>=1.17.0->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (10.0) Requirement already satisfied: mpmath>=0.19 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from sympy->onnxruntime<2.0.0,>=1.17.0->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (1.3.0) Requirement already satisfied: cachetools<6.0,>=2.0.0 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from google-auth>=1.0.1->kubernetes>=28.1.0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (5.3.2) Requirement already satisfied: pyasn1-modules>=0.2.1 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from google-auth>=1.0.1->kubernetes>=28.1.0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (0.3.0) Requirement already satisfied: rsa<5,>=3.1.4 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from google-auth>=1.0.1->kubernetes>=28.1.0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (4.9) Requirement already satisfied: zipp>=0.5 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from importlib-metadata<7.0,>=6.0->opentelemetry-api>=1.2.0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (3.17.0) Requirement already satisfied: pyasn1<0.6.0,>=0.4.6 in /Users/sourabhdesai/Library/Caches/pypoetry/virtualenvs/llama-index-cXQhuK8v-py3.11/lib/python3.11/site-packages (from pyasn1-modules>=0.2.1->google-auth>=1.0.1->kubernetes>=28.1.0->chromadb<0.5.0,>=0.4.22->llama-index-vector-stores-chroma<0.2.0,>=0.1.1->llama-index-cli<0.2.0,>=0.1.2->llama-index) (0.5.1) [notice] A new release of pip is available: 23.3.2 -> 24.0 [notice] To update, run: pip install --upgrade pip
下载数据
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!mkdir -p 'data/paul_graham/'
!wget 'https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt' -O 'data/paul_graham/paul_graham_essay1.txt'
!wget 'https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt' -O 'data/paul_graham/paul_graham_essay2.txt'
!wget 'https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt' -O 'data/paul_graham/paul_graham_essay3.txt'
!mkdir -p 'data/paul_graham/' !wget 'https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt' -O 'data/paul_graham/paul_graham_essay1.txt' !wget 'https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt' -O 'data/paul_graham/paul_graham_essay2.txt' !wget 'https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt' -O 'data/paul_graham/paul_graham_essay3.txt'
--2024-03-21 16:03:25-- https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 2606:50c0:8003::154, 2606:50c0:8000::154, 2606:50c0:8001::154, ... Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|2606:50c0:8003::154|:443... connected. HTTP request sent, awaiting response... 404 Not Found 2024-03-21 16:03:25 ERROR 404: Not Found. --2024-03-21 16:03:25-- https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 2606:50c0:8003::154, 2606:50c0:8000::154, 2606:50c0:8001::154, ... Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|2606:50c0:8003::154|:443... connected. HTTP request sent, awaiting response... 404 Not Found 2024-03-21 16:03:25 ERROR 404: Not Found. --2024-03-21 16:03:25-- https://raw.githubusercontent.com/run-llama/llama_index/main/docs/docs/examples/data/paul_graham/paul_graham_essay.txt Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 2606:50c0:8003::154, 2606:50c0:8000::154, 2606:50c0:8001::154, ... Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|2606:50c0:8003::154|:443... connected. HTTP request sent, awaiting response... 404 Not Found 2024-03-21 16:03:25 ERROR 404: Not Found.
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from llama_index.core import SimpleDirectoryReader
from llama_index.core import SimpleDirectoryReader
加载特定文件
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reader = SimpleDirectoryReader(
input_files=["./data/paul_graham/paul_graham_essay1.txt"]
)
reader = SimpleDirectoryReader( input_files=["./data/paul_graham/paul_graham_essay1.txt"] )
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docs = reader.load_data()
print(f"Loaded {len(docs)} docs")
docs = reader.load_data() print(f"已加载 {len(docs)} 个文档")
Loaded 1 docs
从目录加载所有（顶级）文件
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reader = SimpleDirectoryReader(input_dir="./data/paul_graham/")
reader = SimpleDirectoryReader(input_dir="./data/paul_graham/")
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docs = reader.load_data()
print(f"Loaded {len(docs)} docs")
docs = reader.load_data() print(f"已加载 {len(docs)} 个文档")
Loaded 3 docs
从目录加载所有（递归）文件
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!mkdir -p 'data/paul_graham/nested'
!echo "This is a nested file" > 'data/paul_graham/nested/nested_file.md'
!mkdir -p 'data/paul_graham/nested' !echo "This is a nested file" > 'data/paul_graham/nested/nested_file.md'
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# only load markdown files
required_exts = [".md"]
reader = SimpleDirectoryReader(
input_dir="./data",
required_exts=required_exts,
recursive=True,
)
# 只加载 markdown 文件 required_exts = [".md"] reader = SimpleDirectoryReader( input_dir="./data", required_exts=required_exts, recursive=True, )
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docs = reader.load_data()
print(f"Loaded {len(docs)} docs")
docs = reader.load_data() print(f"已加载 {len(docs)} 个文档")
Loaded 1 docs
创建一个迭代器来加载文件并在加载时处理它们
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reader = SimpleDirectoryReader(
input_dir="./data",
recursive=True,
)
all_docs = []
for docs in reader.iter_data():
for doc in docs:
# do something with the doc
doc.text = doc.text.upper()
all_docs.append(doc)
print(len(all_docs))
reader = SimpleDirectoryReader( input_dir="./data", recursive=True, ) all_docs = [] for docs in reader.iter_data(): for doc in docs: # 对文档进行一些处理 doc.text = doc.text.upper() all_docs.append(doc) print(len(all_docs))
4
通过 aload_data 可用异步执行
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已复制！
import nest_asyncio
nest_asyncio.apply()
reader = SimpleDirectoryReader(
input_dir="./data",
recursive=True,
)
all_docs = await reader.aload_data()
print(len(all_docs))
import nest_asyncio nest_asyncio.apply() reader = SimpleDirectoryReader( input_dir="./data", recursive=True, ) all_docs = await reader.aload_data() print(len(all_docs))
4
完整配置¶
这是可以传递给 SimpleDirectoryReader 的完整参数列表
class SimpleDirectoryReader(BaseReader):
"""Simple directory reader.
Load files from file directory.
Automatically select the best file reader given file extensions.
Args:
input_dir (str): Path to the directory.
input_files (List): List of file paths to read
(Optional; overrides input_dir, exclude)
exclude (List): glob of python file paths to exclude (Optional)
exclude_hidden (bool): Whether to exclude hidden files (dotfiles).
exclude_empty (bool): Whether to exclude empty files (Optional).
encoding (str): Encoding of the files.
Default is utf-8.
errors (str): how encoding and decoding errors are to be handled,
see https://docs.pythonlang.cn/3/library/functions.html#open
recursive (bool): Whether to recursively search in subdirectories.
False by default.
filename_as_id (bool): Whether to use the filename as the document id.
False by default.
required_exts (Optional[List[str]]): List of required extensions.
Default is None.
file_extractor (Optional[Dict[str, BaseReader]]): A mapping of file
extension to a BaseReader class that specifies how to convert that file
to text. If not specified, use default from DEFAULT_FILE_READER_CLS.
num_files_limit (Optional[int]): Maximum number of files to read.
Default is None.
file_metadata (Optional[Callable[str, Dict]]): A function that takes
in a filename and returns a Dict of metadata for the Document.
Default is None.
fs (Optional[fsspec.AbstractFileSystem]): File system to use. Defaults
to using the local file system. Can be changed to use any remote file system
exposed via the fsspec interface.
"""
