code: def forward_slash_path_conversion(path):
      # For compatibility, we want to enforce output identical to `to_forward_slash_path`.
      # However, there are many paths that os.open etc. will coerce to the same path, and
      # we'd like to keep only one canonical representation (otherwise we can break things
      # by having artifact paths that have distinct keys but identical file paths).
      #
      # For completeness:
      # 1. The empty path '.' or '' is always represented as '.'.
      # 2. A directory is always represented as `.../d`, never as `.../d/` or `.../d/.`.
      # 3. Current directories are folded: `./a/././b` is `a/b`.
      # 4. Empty directories are folded: `a///b` is `a/b`.
      #    4a. Anchors are preserved: `///a` and `/a` are `/a`.
      #    4b. `//a` is `//a`, since '//' is a separate anchor. `///+` is always `/`.
      #        4b(i). `//` is not an anchor on Windows unless it's succeeded by a
      #               directory followed by a single slash.
      #
      # NOTE: there are still paths that collide! In particular, it's not possible in the
      # presence of symlinks to determine whether `a/../b` and `b` are the same path
      # without checking a specific filesystem, so those are still stored as separate
      # paths, but will almost certainly break something if they're used.
      #
      # There are also deeply broken paths (mostly due to cross platform issues) that we
      # aren't attempting to fix or work around and will just break in unpleasant ways.
      canonical = to_forward_slash_path(path)
  
      if re.match(r"//([^/]|$)", canonical):
          anchor, body = "//", canonical[2:]  # The anchor is "//".
          # On Windows, this gets even weirder. The anchor is "/" instead of "//" unless
          # the first non-anchor directory marker is also doubled. We're not trying to
          # replicate this logic.
      elif re.match(r"/+", canonical):
          anchor, body = "/", canonical.lstrip(
              "/"
          )  # The anchor is "/".
      else:
          anchor, body = "", canonical  # There is no anchor.
  
      while re.match(r"\./+", body):
          body = re.sub(r"^\./+", "", body)  # Remove leading "./".
      while re.findall(r"/+\./+", body):
          body = re.sub(r"/+\./+", "/", body)  # Replace "/./" with "/".
      while re.findall(r"/+\.?$", body):
          body = re.sub(
              r"/+\.?$", "", body
          )  # Remove trailing "/." or "/".
      while re.findall(r"//+", body):
          body = re.sub(r"//+", "/", body)  # Replace "//" with "/".
  
      if anchor and body == ".":
          body = ""
      canonical = anchor + body
      if not canonical:
          canonical = "."
  
      return canonical
  
file_path: wandb/tests/pytest_tests/unit_tests/test_lib/test_paths.py
imports: import itertools
  import platform
  import re
  from pathlib import Path, PurePath, PurePosixPath, PureWindowsPath
  import pytest
  from wandb.sdk.lib.paths import LogicalPath
  from wandb.util import to_forward_slash_path
label_desc: Use image node_id 4 for calling a global function with example usage: forward_slash_path_conversion(path) and returns: canonical