__qiskit_version__ deprecation

qiskit/tools/jupyter/version_table.py

@@ -14,6 +14,7 @@
 """A module for monitoring backends."""
 
 import time
+from sys import modules
 from IPython.display import HTML, display
 from IPython.core.magic import line_magic, Magics, magics_class
 import qiskit
@@ -33,19 +34,27 @@ def qiskit_version_table(self, line="", cell=None):
         """
         html = "<h3>Version Information</h3>"
         html += "<table>"
-        html += "<tr><th>Qiskit Software</th><th>Version</th></tr>"
+        html += "<tr><th>Software</th><th>Version</th></tr>"
 
-        packages = []
-        qver = qiskit.__qiskit_version__
+        packages = {}
 
-        for pkg in qver:
-            if qver[pkg]:
-                packages.append((f"<code>{pkg}</code>", qver[pkg]))
+        from importlib.metadata import metadata, PackageNotFoundError
 
-        for name, version in packages:
-            html += f"<tr><td>{name}</td><td>{version}</td></tr>"
+        try:
+            packages["qiskit"] = metadata("qiskit")["Version"]
+        except PackageNotFoundError:
+            packages["qiskit"] = None
+
+        packages["qiskit-terra"] = qiskit.__version__
+
+        qiskit_modules = {module.split(".")[0] for module in modules.keys() if "qiskit" in module}
+        for qiskit_module in qiskit_modules:
+            packages[qiskit_module] = getattr(modules[qiskit_module], "__version__", None)
+
+        for name, version in packages.items():
+            html += f"<tr><td><code>{name}</code></td><td>{version}</td></tr>"
 
-        html += "<tr><th>System information</th></tr>"
+        html += "<tr><th colspan='2'>System information</th></tr>"
 
         local_hw_info = local_hardware_info()
         sys_info = [

qiskit/version.py

@@ -12,12 +12,14 @@
 
 # pylint: disable=no-name-in-module,broad-except,cyclic-import
 
-"""Contains the terra version."""
+"""Contains Qiskit (terra) version."""
 
 import os
 import subprocess
 from collections.abc import Mapping
 
+import warnings
+
 ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
 
 
@@ -86,16 +88,21 @@ def get_version_info():
 
 
 class QiskitVersion(Mapping):
-    """A lazy loading wrapper to get qiskit versions."""
+    """DEPRECATED in 0.25.0 use qiskit.__version__"""
 
     __slots__ = ["_version_dict", "_loaded"]
 
     def __init__(self):
+        warnings.warn(
+            "qiskit.__qiskit_version__ is deprecated since "
+            "Qiskit Terra 0.25.0, and will be removed 3 months or more later. "
+            "Instead, you should use qiskit.__version__. The other packages listed in "
+            "former qiskit.__qiskit_version__ have their own __version__ module level dunder, "
+            "as standard in PEP 8.",
+            category=DeprecationWarning,
+        )
         self._version_dict = {
             "qiskit-terra": __version__,
-            "qiskit-aer": None,
-            "qiskit-ignis": None,
-            "qiskit-ibmq-provider": None,
             "qiskit": None,
         }
         self._loaded = False

releasenotes/notes/qiskit_version-956916f7b8d7bbb9.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    The magic ``%qiskit_version_table`` from ``qiskit.tools.jupyter`` now includes all
+    imported modules with ``'qiskit`` in their name.
+deprecations:
+  - |
+    The dictionary ``qiskit.__qiskit_version__`` is deprecated, as Qiskit is define with a single package (``qiskit-terra``).
+    In the future, ``qiskit.__version__`` will be the single point to query the Qiskit release, as a standard string.