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1c919fc 6b569cb 1c919fc 6b569cb 1c919fc 6b569cb 1c919fc 6b569cb 1c919fc 6b569cb 1c919fc 6b569cb 1c919fc 6b569cb 1c919fc | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 | import os
import re
from typing import List
import PyPDF2
class TextFileLoader:
def __init__(self, path: str, encoding: str = "utf-8"):
self.documents = []
self.path = path
self.encoding = encoding
def load(self):
if os.path.isdir(self.path):
self.load_directory()
else:
self.load_file()
def load_file(self):
with open(self.path, "r", encoding=self.encoding) as f:
self.documents.append(f.read())
def load_directory(self):
for root, _, files in os.walk(self.path):
for file in files:
if file.endswith(".txt"):
with open(
os.path.join(root, file), "r", encoding=self.encoding
) as f:
self.documents.append(f.read())
def load_documents(self):
self.load()
return self.documents
class CharacterTextSplitter:
def __init__(
self,
chunk_size: int = 1000,
chunk_overlap: int = 200,
):
assert (
chunk_size > chunk_overlap
), "Chunk size must be greater than chunk overlap"
self.chunk_size = chunk_size
self.chunk_overlap = chunk_overlap
def split(self, text: str) -> List[str]:
chunks = []
for i in range(0, len(text), self.chunk_size - self.chunk_overlap):
chunks.append(text[i : i + self.chunk_size])
return chunks
def split_texts(self, texts: List[str]) -> List[str]:
chunks = []
for text in texts:
chunks.extend(self.split(text))
return chunks
class PDFLoader:
def __init__(self, path: str):
self.documents = []
self.path = path
print(f"PDFLoader initialized with path: {self.path}")
def load(self):
print(f"Loading PDF from path: {self.path}")
print(f"Path exists: {os.path.exists(self.path)}")
print(f"Is file: {os.path.isfile(self.path)}")
print(f"Is directory: {os.path.isdir(self.path)}")
print(f"File permissions: {oct(os.stat(self.path).st_mode)[-3:]}")
try:
# Try to open the file first to verify access
with open(self.path, 'rb') as test_file:
pass
# If we can open it, proceed with loading
if os.path.isdir(self.path):
self.load_directory()
else:
self.load_file()
except IOError as e:
raise ValueError(f"Cannot access file at '{self.path}': {str(e)}")
except Exception as e:
raise ValueError(f"Error processing file at '{self.path}': {str(e)}")
def load_file(self):
with open(self.path, 'rb') as file:
# Create PDF reader object
pdf_reader = PyPDF2.PdfReader(file)
# Extract text from each page separately
self.documents = [] # Clear existing documents
for page_num, page in enumerate(pdf_reader.pages):
page_text = page.extract_text() or "" # Handle None returns
if page_text.strip(): # Only add non-empty pages
self.documents.append(page_text)
else:
print(f"Warning: Page {page_num + 1} is empty in {os.path.basename(self.path)}")
print(f"Loaded {len(self.documents)} pages from {os.path.basename(self.path)}")
def load_directory(self):
self.documents = [] # Clear existing documents
for root, _, files in os.walk(self.path):
for file in files:
if file.lower().endswith('.pdf'):
file_path = os.path.join(root, file)
try:
with open(file_path, 'rb') as f:
pdf_reader = PyPDF2.PdfReader(f)
# Extract text from each page separately
for page_num, page in enumerate(pdf_reader.pages):
page_text = page.extract_text() or ""
if page_text.strip():
self.documents.append(page_text)
else:
print(f"Warning: Page {page_num + 1} is empty in {file}")
except Exception as e:
print(f"Error processing {file}: {str(e)}")
def load_documents(self):
if not self.documents: # Only load if not already loaded
self.load()
return self.documents
if __name__ == "__main__":
loader = TextFileLoader("data/KingLear.txt")
loader.load()
splitter = CharacterTextSplitter()
chunks = splitter.split_texts(loader.documents)
print(len(chunks))
print(chunks[0])
print("--------")
print(chunks[1])
print("--------")
print(chunks[-2])
print("--------")
print(chunks[-1])
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