Nodes

ggalvangjx

hello there, I am trying to replace text within a node of a markdown document however having some trouble. Is there anything wrong with the code below? the text are just not changed.

sample document:

Plain Text

# A
- text for A

# B
- text for b

code:

Plain Text

from llama_index.core.node_parser import MarkdownNodeParser
parser = MarkdownNodeParser()

for page in document:       
    page_nodes = parser.get_nodes_from_documents([page])
    for node in page_nodes:
        if node.metadata['Header_1'] == 'B':
            node.text = 'New text for B'
        print(node.text) # text is changed
    print(page.text) # text is not changed!

7 comments

LLogan M

page and page_nodes are two separate objects.

You are modifying only the nodes, but that has nothing to do with the page

ggalvangjx

ok so what I did was reconstruct a new page out of all old and new node text

LLogan M

Hmm? I don't think so?

In this code sample you modified the page_nodes for each page, but you did not modify the page

ggalvangjx

haha i meant i already fix my issue by doing what i said in my previous text

ggalvangjx

sorry wasn't being clear

ggalvangjx

Plain Text

reconstructed_nodes_text = ''
for page in document:       
    page_nodes = parser.get_nodes_from_documents([page])
    for node in page_nodes:
        if node.metadata['Header_1'] == 'B':
             reconstructed_nodes_text += '# B' + 'New text for B'
        else:
             reconstructed_nodes_text += '# ' + node.text + '\n\n'

reconstructed_page = Document(text=reconstructed_nodes_text)

LLogan M

Oh great! 😁

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