code: def solve(self, id_, packages, python, platform):
      prefix = self.micromamba.path_to_environment(id_)
      if prefix is None:
          msg = "Unable to locate a Micromamba managed virtual environment\n"
          msg += "for id {id}".format(id=id_)
          raise PipException(msg)
  
      with tempfile.TemporaryDirectory() as tmp_dir:
          report = "{tmp_dir}/report.json".format(tmp_dir=tmp_dir)
          implementations, platforms, abis = zip(
              *[
                  (tag.interpreter, tag.platform, tag.abi)
                  for tag in pip_tags(python, platform)
              ]
          )
          custom_index_url, extra_index_urls = self.indices(prefix)
          cmd = [
              "install",
              "--dry-run",
              "--only-binary=:all:",  # only wheels
              "--upgrade-strategy=only-if-needed",
              "--target=%s" % tmp_dir,
              "--report=%s" % report,
              "--progress-bar=off",
              "--quiet",
              *(
                  ["--index-url", custom_index_url]
                  if custom_index_url
                  else []
              ),
              *(
                  chain.from_iterable(
                      product(
                          ["--extra-index-url"], set(extra_index_urls)
                      )
                  )
              ),
              *(chain.from_iterable(product(["--abi"], set(abis)))),
              *(
                  chain.from_iterable(
                      product(["--platform"], set(platforms))
                  )
              ),
              # *(chain.from_iterable(product(["--implementations"], set(implementations)))),
          ]
          for package, version in packages.items():
              if version.startswith(("<", ">", "!", "~", "@")):
                  cmd.append(f"{package}{version}")
              elif not version:
                  cmd.append(f"{package}{version}")
              else:
                  cmd.append(f"{package}=={version}")
          self._call(prefix, cmd)
  
          def _format(dl_info):
              res = {k: v for k, v in dl_info.items() if k in ["url"]}
              # If source url is not a wheel, we need to build the target.
              res["require_build"] = not res["url"].endswith(".whl")
  
              # Reconstruct the VCS url and pin to current commit_id
              # so using @branch as a version acts as expected.
              vcs_info = dl_info.get("vcs_info")
              if vcs_info:
                  res["url"] = "{vcs}+{url}@{commit_id}".format(
                      **vcs_info, **res
                  )
                  # used to deduplicate the storage location in case wheel does not
                  # build with enough unique identifiers.
                  res["hash"] = vcs_info["commit_id"]
              return res
  
          with open(report, mode="r", encoding="utf-8") as f:
              return [
                  _format(item["download_info"])
                  for item in json.load(f)["install"]
              ]
  
imports: import json
  import os
  import re
  import shutil
  import subprocess
  import tempfile
  from concurrent.futures import ThreadPoolExecutor
  from itertools import chain, product
  from urllib.parse import unquote
  from metaflow.exception import MetaflowException
  from metaflow.util import which
  from .micromamba import Micromamba
  from .utils import pip_tags, wheel_tags
label_desc: Use image node_id 2 for calling the Pip obj's underlying member method code with example usage: obj.solve(id_, packages, python, platform) and returns: res, unknown