File dcheck.py-fix-crash-in-Qt4-version-check.patch of Package hplip

From ea881d92ac3a55d946514a0d8fef260bb2af2173 Mon Sep 17 00:00:00 2001
From: Martin Wilck <mwilck@suse.com>
Date: Sat, 9 Jan 2021 01:21:08 +0100
Subject: [PATCH 12/33] dcheck.py: fix crash in Qt4 version check

On openSUSE, the "PyQt4" module may be available with no submodules.
I.e. "import PyQt4" succeeds, wheras "from PyQt4 import QtCore" fails.
We don't want to make hplip depend on python3-qt4, as all tools use Qt5.

This leads to the following python backtrace in hp-doctor:

Traceback (most recent call last):
  File "/usr/bin/hp-doctor", line 297, in <module>
    num_errors, num_warns = dep.validate(DEPENDENCY_RUN_AND_COMPILE_TIME, False)
  File "/usr/share/hplip/check.py", line 368, in validate
    self.core.dependencies[dep])
  File "/usr/share/hplip/check.py", line 210, in __update_deps_info
    installed_ver = self.core.version_func[deps_info[6]]()
  File "/usr/share/hplip/installer/dcheck.py", line 304, in get_pyQt4_version
    from PyQt4 import QtCore
ImportError: cannot import name 'QtCore'

Fix it.
---
 installer/dcheck.py | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/installer/dcheck.py b/installer/dcheck.py
index 2d1c413..6dd7d51 100644
--- a/installer/dcheck.py
+++ b/installer/dcheck.py
@@ -300,8 +300,12 @@ def get_pyQt4_version():
     except ImportError:
         ver='-'
     else:
-        from PyQt4 import QtCore
-        ver = QtCore.PYQT_VERSION_STR
+        try:
+            from PyQt4 import QtCore
+        except ImportError:
+            pass
+        else:
+            ver = QtCore.PYQT_VERSION_STR
     return ver
 
 
@@ -314,8 +318,12 @@ def get_pyQt5_version():
     except ImportError:
         ver='-'
     else:
-        from PyQt5 import QtCore
-        ver = QtCore.PYQT_VERSION_STR
+        try:
+            from PyQt5 import QtCore
+        except ImportError:
+            pass
+        else:
+            ver = QtCore.PYQT_VERSION_STR
     return ver
 
 def get_reportlab_version():
-- 
2.52.0