Unable to find installation candidates for pyqt5

[jasperjonker]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Raspberry pi - Raspbian 10
• Poetry version: 1.1.5
• Link of a Gist with the contents of your pyproject.toml file: pyproject.toml

Issue

I'm getting issues updating my current poetry setup. When running poetry update -vvv:

.
.
   1: Version solving took 31.418 seconds.
   1: Tried 1 solutions.

Writing lock file

Finding the necessary packages for the current system

Package operations: 1 install, 23 updates, 0 removals

  • Updating cryptography (3.4.6 -> 3.4.7): Downloading... 100%
  • Updating cryptography (3.4.6 -> 3.4.7): Installing...
  • Updating cryptography (3.4.6 -> 3.4.7)
  • Installing pyqt5-qt5 (5.15.2): Pending...
  • Installing pyqt5-qt5 (5.15.2): Failed

  RuntimeError

  Unable to find installation candidates for pyqt5-qt5 (5.15.2)

  at ~/.poetry/lib/poetry/installation/chooser.py:72 in choose_for
       68│ 
       69│             links.append(link)
       70│ 
       71│         if not links:
    →  72│             raise RuntimeError(
       73│                 "Unable to find installation candidates for {}".format(package)
       74│             )
       75│ 
       76│         # Get the best link

  • Updating sqlalchemy (1.4.2 -> 1.4.3): Downloading... 100%
  • Updating sqlalchemy (1.4.2 -> 1.4.3): Installing...
  • Updating sqlalchemy (1.4.2 -> 1.4.3)

Does this mean there is no pyqt5 version available that the other packages support? As I have no problem installing pyqt5==5.15.2 using pip.

[BruceZhang1993]

I have a problem related with this issue. poetry cannot find wheel package for PyQt5, instead, it tries to build from source

[abn]

Based on the original report, and looking at https://pypi.org/project/PyQt5-Qt5/#files the behavior is expected.

This is because,

1. The package does not seem to publish sdists.
2. There exists no arm (raspberry pi) compatible wheel available for the package in question.
3. The pip command is using pyqt5 and not pyqt5-qt5. The former has sdists available (https://pypi.org/project/PyQt5/#files), and would be used to build from source since no arm wheel exist.

[jasperjonker]

Thank you for your comment @abn. However, I have specified pyqt5 in my pyproject.toml, not pyqt5-qt5. Why does it search for pyqt5-qt5 in the first place?

[npielawski]

I have the same issue, did you find any solution @jasperjonker?

[jasperjonker]

Unfortunately the wheels provided by PyQt5 is only for a few platforms (only x86 on mac, linux & windows). It works for me on arm (raspberry pi) specifying PyQt5 = "=5.15.2" in pyproject.toml. The source files are included there, so it'll compile it from source (note that installing it will take a long time).

If that doesn't work, download the source code and compile it yourself.

[dimbleby]

if a project provides neither a source distribution nor a binary distribution suitable for your platform, there is nothing that poetry can do about this.

this can be closed

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.