RecursiveCharacterTextSplitter in LangChain - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a RecursiveCharacterTextSplitter with a chunk size of 100.

LangChain

from langchain.text_splitter import RecursiveCharacterTextSplitter
splitter = RecursiveCharacterTextSplitter(chunk_size=[1])

Drag options to blanks, or click blank then click option'

A100

B200

C50

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Using a chunk size too small or too large for the example.

Forgetting to import RecursiveCharacterTextSplitter.

The chunk_size parameter sets the maximum size of each text chunk. Here, 100 is the correct size.

2fill in blank

medium

Complete the code to split the text variable using the splitter.

LangChain

texts = splitter.[1](text)

Drag options to blanks, or click blank then click option'

Ajoin

Bsplit_text

Cmerge

Dcombine

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods that do not exist on the splitter object.

Confusing splitting with joining or merging.

The method split_text is used to split the input text into chunks.

3fill in blank

hard

Fix the error in the code by completing the parameter to set the chunk overlap to 20.

LangChain

splitter = RecursiveCharacterTextSplitter(chunk_size=100, chunk_overlap=[1])

Drag options to blanks, or click blank then click option'

A30

B10

C20

D40

Attempts:

3 left

💡 Hint

Common Mistakes

Setting overlap larger than chunk size.

Using invalid parameter names.

The chunk_overlap parameter controls how many characters overlap between chunks. Setting it to 20 means each chunk shares 20 characters with the next.

4fill in blank

hard

Fill both blanks to create a splitter with chunk size 150 and chunk overlap 30.

LangChain

splitter = RecursiveCharacterTextSplitter(chunk_size=[1], chunk_overlap=[2])

Drag options to blanks, or click blank then click option'

A150

B100

C30

D20

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping chunk size and overlap values.

Using values that are too close or equal.

Use 150 for chunk_size and 30 for chunk_overlap to control chunking behavior.

5fill in blank

hard

Fill all three blanks to create a splitter with chunk size 120, chunk overlap 15, and separators set to newline and space.

LangChain

splitter = RecursiveCharacterTextSplitter(chunk_size=[1], chunk_overlap=[2], separators=[3])

Drag options to blanks, or click blank then click option'

A100

B15

C["\n", " "]

D120

Attempts:

3 left

💡 Hint

Common Mistakes

Using separators as a string instead of a list.

Mixing up chunk size and overlap values.

Set chunk_size to 120, chunk_overlap to 15, and separators to a list containing newline and space characters for splitting.

Practice

1. What is the main purpose of the RecursiveCharacterTextSplitter in langchain?

easy

A. To split long text into smaller chunks using multiple separators while keeping context.

B. To merge multiple texts into one large string.

C. To translate text into different languages.

D. To encrypt text for secure storage.

Solution

1. Step 1: Understand the function of RecursiveCharacterTextSplitter

   This tool is designed to break down long text into smaller pieces using various separators like paragraphs, sentences, or characters.

2. Step 2: Recognize the benefit of overlapping chunks

   It keeps some overlap between chunks to maintain context, which helps language models understand the text better.

3. Final Answer:

   To split long text into smaller chunks using multiple separators while keeping context. -> Option A

4. Quick Check:

   Splitting text with context = A [OK]

Hint: Remember: It splits text into chunks with overlap [OK]

Common Mistakes:

• Thinking it merges text instead of splitting
• Confusing it with translation or encryption tools
• Ignoring the overlap feature

2. Which of the following is the correct way to create a RecursiveCharacterTextSplitter with a chunk size of 100 and chunk overlap of 20?

easy

A. RecursiveCharacterTextSplitter(chunkSize=100, chunkOverlap=20)

B. RecursiveCharacterTextSplitter(size=100, overlap=20)

C. RecursiveCharacterTextSplitter(chunk=100, overlap=20)

D. RecursiveCharacterTextSplitter(chunk_size=100, chunk_overlap=20)

Solution

1. Step 1: Recall the parameter names for RecursiveCharacterTextSplitter

   The correct parameters are chunk_size and chunk_overlap to set chunk length and overlap.

2. Step 2: Match the correct syntax

   RecursiveCharacterTextSplitter(chunk_size=100, chunk_overlap=20) uses the exact parameter names and values correctly.

3. Final Answer:

   RecursiveCharacterTextSplitter(chunk_size=100, chunk_overlap=20) -> Option D

4. Quick Check:

   Correct parameter names = D [OK]

Hint: Use exact parameter names: chunk_size and chunk_overlap [OK]

Common Mistakes:

• Using incorrect parameter names like size or chunkSize
• Mixing camelCase and snake_case
• Omitting required parameters

3. Given the following code snippet, what will be the length of the first chunk if the text is "Hello world! This is a test." and chunk_size=12, chunk_overlap=4?

splitter = RecursiveCharacterTextSplitter(chunk_size=12, chunk_overlap=4)
chunks = splitter.split_text("Hello world! This is a test.")
print(len(chunks[0]))

medium

A. 12

B. 16

C. 8

D. 20

Solution

1. Step 1: Understand chunk size and overlap effect

   The chunk size is 12, so each chunk will be at most 12 characters long. Overlap affects next chunks, not the first chunk length.

2. Step 2: Determine first chunk length

   The first chunk will be exactly 12 characters long, as it starts from the beginning and takes up to chunk_size.

3. Final Answer:

   12 -> Option A

4. Quick Check:

   First chunk length = chunk_size = 12 [OK]

Hint: First chunk length equals chunk_size, overlap affects next chunks [OK]

Common Mistakes:

• Adding overlap to first chunk length
• Assuming first chunk is shorter than chunk_size
• Confusing chunk size with total text length

4. What is the error in the following code snippet using RecursiveCharacterTextSplitter?

splitter = RecursiveCharacterTextSplitter(chunk_size=50, chunk_overlap=60)
chunks = splitter.split_text("Some long text here...")

medium

A. Missing import statement for RecursiveCharacterTextSplitter

B. split_text method does not exist

C. chunk_overlap cannot be larger than chunk_size

D. chunk_size must be a string, not an integer

Solution

1. Step 1: Check parameter constraints

   chunk_overlap must be less than or equal to chunk_size to avoid logical errors in splitting.

2. Step 2: Identify the error in given values

   chunk_overlap=60 is greater than chunk_size=50, which is invalid and will cause an error.

3. Final Answer:

   chunk_overlap cannot be larger than chunk_size -> Option C

4. Quick Check:

   Overlap ≤ chunk size rule = B [OK]

Hint: Overlap must never exceed chunk size [OK]

Common Mistakes:

• Ignoring parameter value relationships
• Assuming method names are incorrect without checking
• Confusing data types for parameters

5. You want to split a large document into chunks of 200 characters with 50 characters overlapping, prioritizing splitting first by paragraphs, then sentences, then words. Which setup of RecursiveCharacterTextSplitter correctly achieves this?

hard

A. RecursiveCharacterTextSplitter(chunk_size=200, chunk_overlap=50, separators=[" ", ". ", "\n\n"])

B. RecursiveCharacterTextSplitter(chunk_size=200, chunk_overlap=50, separators=["\n\n", ". ", " "])

C. RecursiveCharacterTextSplitter(chunk_size=200, chunk_overlap=50, separators=[". ", "\n\n", " "])

D. RecursiveCharacterTextSplitter(chunk_size=200, chunk_overlap=50, separators=[" ", "\n\n", ". "])

Solution

1. Step 1: Understand separator priority order

   The splitter tries separators in order; to prioritize paragraphs, then sentences, then words, the list must start with paragraph separator "\n\n", then sentence ". ", then space " ".

2. Step 2: Match the correct separators list

   RecursiveCharacterTextSplitter(chunk_size=200, chunk_overlap=50, separators=["\n\n", ". ", " "]) correctly lists separators in the desired priority order.

3. Final Answer:

   RecursiveCharacterTextSplitter(chunk_size=200, chunk_overlap=50, separators=["\n\n", ". ", " "]) -> Option B

4. Quick Check:

   Separator order matches priority = A [OK]

Hint: List separators from largest to smallest text unit [OK]

Common Mistakes:

• Reversing separator order
• Using wrong separator strings
• Ignoring overlap or chunk size settings