🔒 Circular import

[bitter verge]

I am implement a virtual file system
encounter circular import problem:

from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from .directory import Directory
    from .archive import Archive

class VFile:
  def __init__(self, data: bytes, parent: Directory | Archive ...):
    ...

class Archive(VFile):
  def _read(self):
    for m in metadata:
      file_data = ...
      FileType = guess_type(file_data)
      self.files.append(FileType(data, self))
    ...

from .util import guess_type
class Directory(VFile):
  def _parse_btree(self):
    FileType = guess_type(data)
    self.files.append(FileType(data, self))
    ...

from .common import VFile
from .archive import Archive
from .directory import Directory

def guess_type(data: bytes) -> type[VFile]:
  if is_archive(data):
    return Archive
  if is_dir(data):
    return Directory
  ... 
  return VFile

how to solve

[bright maple]

@bitter verge

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[hollow thorn]

Use a function-local import for guess_type

in _parse_btree()

[bright maple]

Python help channel closed for inactivity

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