Reading a block from one dxf file and inserting it into another one keeps failed

[lyc12569]

I tried to read a block from one dxf file and insert it into another dxf file, but for some reason it kept failing. My code is as follows,which is simple. May I ask why it doesn't work?

path = r"D:/Wechatfile/WeChat Files/wxid_gfwt3ta1c2g622/FileStorage/File/2023-11/B.dxf"
doc = ezdxf.readfile(path)
msp = doc.modelspace()
blocks = msp.query('INSERT')
for block in blocks:
    block_name = block.dxf.name
    insertion_point = block.dxf.insert
    if block_name == "BB":
        block_def = doc.blocks[block_name]
        print(f"Block Name: {block_name}")
        print(f"Insertion Point: {insertion_point}")

doc2 = ezdxf.new('R2010')
flag = doc2.blocks.new(name='FLAG')
for entity in block_def:
    flag.add_entity(entity.copy())
msp2 = doc2.modelspace()
msp2.add_blockref('FLAG', (0,0))
doc2.saveas("blockref_tutorial5.dxf")

[mozman]

This doesn't work that way. Copying is much more complicated, because of the required resource management.

This script uses the xref module to import the block BB into a new DXF document:

import ezdxf
from ezdxf import xref

path = r"D:/Wechatfile/WeChat Files/wxid_gfwt3ta1c2g622/FileStorage/File/2023-11/B.dxf"

# Read the file where my blocks live
source_doc = ezdxf.readfile(path)

# Create a new DXF document.
target_doc = ezdxf.new(dxfversion=source_doc.dxfversion, units=source_doc.units)

# Load blocks by the xref module
block_loader = xref.Loader(source_doc, target_doc)

# Load blocks by the xref module
block_loader = xref.Loader(source_doc, target_doc)
for block_name in ["BB"]:
    block = source_doc.blocks.get(block_name)
    block_loader.load_block_layout(block)
    
# execute import process
block_loader.execute()

msp = target_doc.modelspace()
msp.add_blockref('BB', (0,0))
target_doc.saveas("blockref_tutorial5.dxf")

See also docs for:

• xref module
• XREF Tutorial