在 google colab 机器中安装新数据表版本 1.0.0 时出错

Question

我看到今天刚刚发布了一个新版本的数据表，我正在尝试将它安装在 google 一台 colab 机器上。

!pip install datatable

显示错误如下：

    Collecting datatable
  Using cached https://files.pythonhosted.org/packages/04/0c/bff6497afcf95a3257c4168b95c8acab91c8ef234fe473eaf6689d582da1/datatable-1.0.0.tar.gz
  Getting requirements to build wheel ... done
ERROR: Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/cli/base_command.py", line 153, in _main
    status = self.run(options, args)
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/commands/install.py", line 382, in run
    resolver.resolve(requirement_set)
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/legacy_resolve.py", line 201, in resolve
    self._resolve_one(requirement_set, req)
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/legacy_resolve.py", line 365, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/legacy_resolve.py", line 313, in _get_abstract_dist_for
    req, self.session, self.finder, self.require_hashes
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/operations/prepare.py", line 224, in prepare_linked_requirement
    req, self.req_tracker, finder, self.build_isolation,
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/operations/prepare.py", line 49, in _get_prepared_distribution
    abstract_dist.prepare_distribution_metadata(finder, build_isolation)
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/distributions/source/legacy.py", line 37, in prepare_distribution_metadata
    self._setup_isolation(finder)
  File "/usr/local/lib/python3.7/dist-packages/pip/_internal/distributions/source/legacy.py", line 90, in _setup_isolation
    reqs = backend.get_requires_for_build_wheel()
  File "/usr/local/lib/python3.7/dist-packages/pip/_vendor/pep517/wrappers.py", line 152, in get_requires_for_build_wheel
    'config_settings': config_settings
  File "/usr/local/lib/python3.7/dist-packages/pip/_vendor/pep517/wrappers.py", line 255, in _call_hook
    raise BackendUnavailable(data.get('traceback', ''))
pip._vendor.pep517.wrappers.BackendUnavailable: Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/pip/_vendor/pep517/_in_process.py", line 63, in _build_backend
    obj = import_module(mod_path)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 965, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'ext'

Answer 1

根据 Installation instructions，导致此错误的最可能原因是您环境中的 pip 版本已过时。请升级到 pip 20.3+ 以安装预构建的 manylinux wheel，或者从源代码分发。

Pip 可以通过运行

在 Google Colab 环境中升级

!pip install pip --upgrade

在 google colab 机器中安装新数据表版本 1.0.0 时出错

Error on installing new datatable version 1.0.0 in google colab machine

py-datatable