micropip.install with deps=False seems to always fail

[bmaranville]

I am trying to pre-install dependencies with specific pinning before using micropip.install(..., deps=False) but it seems to fail every time.

I am using micropip with version = 0.8.0 (the version currently loaded in a new jupyterlite session)

To reproduce: in a jupyterlite window, ( https://jupyter.org/try-jupyter/lab/ ) do this:

import micropip
await micropip.install("snowballstemmer", deps=False)

Result:

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
Cell In[1], line 2
      1 import micropip
----> 2 await micropip.install("snowballstemmer", deps=False)

File /lib/python3.12/site-packages/micropip/package_manager.py:133, in PackageManager.install(self, requirements, keep_going, deps, credentials, pre, index_urls, verbose)
    130 if index_urls is None:
    131     index_urls = self.index_urls
--> 133 return await install(
    134     requirements,
    135     index_urls,
    136     keep_going,
    137     deps,
    138     credentials,
    139     pre,
    140     verbose=verbose,
    141 )

File /lib/python3.12/site-packages/micropip/install.py:92, in install(requirements, index_urls, keep_going, deps, credentials, pre, verbose)
     87 for wheel in transaction.wheels:
     88     # detect whether the wheel metadata is from PyPI or from custom location
     89     # wheel metadata from PyPI has SHA256 checksum digest.
     90     wheel_promises.append(wheel.install(wheel_base))
---> 92 await asyncio.gather(*wheel_promises)
     94 packages = [
     95     f"{pkg.name}-{pkg.version}" for pkg in transaction.pyodide_packages
     96 ] + [f"{pkg.name}-{pkg.version}" for pkg in transaction.wheels]
     98 if packages:

File /lib/python3.12/site-packages/micropip/wheelinfo.py:126, in WheelInfo.install(self, target)
    115 """
    116 Install the wheel to the target directory.
    117 
   (...)
    123     4. The wheel's metadata is set.
    124 """
    125 if not self._data:
--> 126     raise RuntimeError(
    127         "Micropip internal error: attempted to install wheel before downloading it?"
    128     )
    129 _validate_sha256_checksum(self._data, self.sha256)
    130 self._extract(target)

RuntimeError: Micropip internal error: attempted to install wheel before downloading it?

[agriyakhetarpal]

Hi @bmaranville, this issue has been fixed with #187 and will be available as a part of micropip 0.9.0 with Pyodide 0.28, which is being planned here: pyodide/pyodide#5495. I'll mark it as a duplicate of #157, #180, and #221. Thank you for reporting!