Add headers for exceptions (#713)

Quick fix to use the same logic for functions and exceptions. Closes #712. A known problem with this implementation is that some headings should not be `h3`, but it depends on the page. See #714.
Qiskit · Jan 26, 2024 · 4381020 · 4381020
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diff --git a/docs/api/qiskit/algorithms.md b/docs/api/qiskit/algorithms.md
@@ -193,6 +193,8 @@ Algorithms that compute the fidelity of pairs of quantum states.
 
 ### Exceptions
 
+### AlgorithmError
+
 <span id="qiskit.algorithms.AlgorithmError" />
 
 `qiskit.algorithms.AlgorithmError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/algorithms/exceptions.py "view source code")

diff --git a/docs/api/qiskit/circuit.md b/docs/api/qiskit/circuit.md
@@ -344,6 +344,8 @@ constructed circuit
 
 Almost all circuit functions and methods will raise a [`CircuitError`](#qiskit.circuit.CircuitError "qiskit.circuit.CircuitError") when encountering an error that is particular to usage of Qiskit (as opposed to regular typing or indexing problems, which will typically raise the corresponding standard Python error).
 
+### CircuitError
+
 <span id="qiskit.circuit.CircuitError" />
 
 `qiskit.circuit.CircuitError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/circuit/exceptions.py "view source code")

diff --git a/docs/api/qiskit/dagcircuit.md b/docs/api/qiskit/dagcircuit.md
@@ -32,6 +32,8 @@ python_api_name: qiskit.dagcircuit
 
 ## Exceptions
 
+### DAGCircuitError
+
 <span id="qiskit.dagcircuit.DAGCircuitError" />
 
 `qiskit.dagcircuit.DAGCircuitError(*msg)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/dagcircuit/exceptions.py "view source code")
@@ -40,6 +42,8 @@ Base class for errors raised by the DAGCircuit object.
 
 Set the error message.
 
+### DAGDependencyError
+
 <span id="qiskit.dagcircuit.DAGDependencyError" />
 
 `qiskit.dagcircuit.DAGDependencyError(*msg)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/dagcircuit/exceptions.py "view source code")

diff --git a/docs/api/qiskit/exceptions.md b/docs/api/qiskit/exceptions.md
@@ -20,6 +20,8 @@ python_api_name: qiskit.exceptions
 
 All Qiskit-related errors raised by Qiskit are subclasses of the base:
 
+### QiskitError
+
 <span id="qiskit.exceptions.QiskitError" />
 
 `qiskit.exceptions.QiskitError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/exceptions.py "view source code")
@@ -36,6 +38,8 @@ Many of the Qiskit subpackages define their own more granular error, to help in
 
 Qiskit has several optional features that depend on other packages that are not required for a minimal install. You can read more about those, and ways to check for their presence, in [`qiskit.utils.optionals`](utils#module-qiskit.utils.optionals "qiskit.utils.optionals"). Trying to use a feature that requires an optional extra will raise a particular error, which subclasses both [`QiskitError`](#qiskit.exceptions.QiskitError "qiskit.exceptions.QiskitError") and the Python built-in `ImportError`.
 
+### MissingOptionalLibraryError
+
 <span id="qiskit.exceptions.MissingOptionalLibraryError" />
 
 `qiskit.exceptions.MissingOptionalLibraryError(libname, name, pip_install=None, msg=None)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/exceptions.py "view source code")
@@ -46,6 +50,8 @@ Set the error message. :param libname: Name of missing library :param name: Name
 
 Two more uncommon errors relate to failures in reading user-configuration files, or specifying a filename that cannot be used:
 
+### QiskitUserConfigError
+
 <span id="qiskit.exceptions.QiskitUserConfigError" />
 
 `qiskit.exceptions.QiskitUserConfigError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/exceptions.py "view source code")
@@ -54,6 +60,8 @@ Raised when an error is encountered reading a user config file.
 
 Set the error message.
 
+### InvalidFileError
+
 <span id="qiskit.exceptions.InvalidFileError" />
 
 `qiskit.exceptions.InvalidFileError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/exceptions.py "view source code")

diff --git a/docs/api/qiskit/extensions.md b/docs/api/qiskit/extensions.md
@@ -34,6 +34,8 @@ python_api_name: qiskit.extensions
 
 The additional gates in this module will tend to raise a custom exception when they encounter problems.
 
+### ExtensionError
+
 <span id="qiskit.extensions.ExtensionError" />
 
 `qiskit.extensions.ExtensionError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/extensions/exceptions.py "view source code")

diff --git a/docs/api/qiskit/opflow.md b/docs/api/qiskit/opflow.md
@@ -198,6 +198,8 @@ the double commutator
 
 ## Exceptions
 
+### OpflowError
+
 <span id="qiskit.opflow.OpflowError" />
 
 `qiskit.opflow.OpflowError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/opflow/exceptions.py "view source code")

diff --git a/docs/api/qiskit/passmanager.md b/docs/api/qiskit/passmanager.md
@@ -161,6 +161,8 @@ With the pass manager framework, a developer can flexibly customize the optimiza
 
 ### Exceptions
 
+### PassManagerError
+
 <span id="qiskit.passmanager.PassManagerError" />
 
 `qiskit.passmanager.PassManagerError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/passmanager/exceptions.py "view source code")

diff --git a/docs/api/qiskit/providers.md b/docs/api/qiskit/providers.md
@@ -75,6 +75,8 @@ It’s worth pointing out that Terra’s version support policy doesn’t mean p
 
 ### Exceptions
 
+### QiskitBackendNotFoundError
+
 <span id="qiskit.providers.QiskitBackendNotFoundError" />
 
 `qiskit.providers.QiskitBackendNotFoundError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/providers/exceptions.py "view source code")
@@ -83,6 +85,8 @@ Base class for errors raised while looking for a backend.
 
 Set the error message.
 
+### BackendPropertyError
+
 <span id="qiskit.providers.BackendPropertyError" />
 
 `qiskit.providers.BackendPropertyError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/providers/exceptions.py "view source code")
@@ -91,6 +95,8 @@ Base class for errors raised while looking for a backend property.
 
 Set the error message.
 
+### JobError
+
 <span id="qiskit.providers.JobError" />
 
 `qiskit.providers.JobError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/providers/exceptions.py "view source code")
@@ -99,6 +105,8 @@ Base class for errors raised by Jobs.
 
 Set the error message.
 
+### JobTimeoutError
+
 <span id="qiskit.providers.JobTimeoutError" />
 
 `qiskit.providers.JobTimeoutError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/providers/exceptions.py "view source code")
@@ -107,6 +115,8 @@ Base class for timeout errors raised by jobs.
 
 Set the error message.
 
+### BackendConfigurationError
+
 <span id="qiskit.providers.BackendConfigurationError" />
 
 `qiskit.providers.BackendConfigurationError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/providers/exceptions.py "view source code")

diff --git a/docs/api/qiskit/pulse.md b/docs/api/qiskit/pulse.md
@@ -2897,6 +2897,8 @@ The number of samples for the time to elapse
 
 ## Exceptions
 
+### PulseError
+
 <span id="qiskit.pulse.PulseError" />
 
 `qiskit.pulse.PulseError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/pulse/exceptions.py "view source code")
@@ -2905,6 +2907,8 @@ Errors raised by the pulse module.
 
 Set the error message.
 
+### BackendNotSet
+
 <span id="qiskit.pulse.BackendNotSet" />
 
 `qiskit.pulse.BackendNotSet(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/pulse/exceptions.py "view source code")
@@ -2913,6 +2917,8 @@ Raised if the builder context does not have a backend.
 
 Set the error message.
 
+### NoActiveBuilder
+
 <span id="qiskit.pulse.NoActiveBuilder" />
 
 `qiskit.pulse.NoActiveBuilder(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/pulse/exceptions.py "view source code")
@@ -2921,6 +2927,8 @@ Raised if no builder context is active.
 
 Set the error message.
 
+### UnassignedDurationError
+
 <span id="qiskit.pulse.UnassignedDurationError" />
 
 `qiskit.pulse.UnassignedDurationError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/pulse/exceptions.py "view source code")
@@ -2929,6 +2937,8 @@ Raised if instruction duration is unassigned.
 
 Set the error message.
 
+### UnassignedReferenceError
+
 <span id="qiskit.pulse.UnassignedReferenceError" />
 
 `qiskit.pulse.UnassignedReferenceError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/pulse/exceptions.py "view source code")

diff --git a/docs/api/qiskit/qasm2.md b/docs/api/qiskit/qasm2.md
@@ -170,6 +170,8 @@ An OpenQASM 2 string representing the circuit.
 
 This module defines a generic error type that derives from [`QiskitError`](exceptions#qiskit.exceptions.QiskitError "qiskit.exceptions.QiskitError") that can be used as a catch when you care about failures emitted by the interoperation layer specifically.
 
+### QASM2Error
+
 <span id="qiskit.qasm2.QASM2Error" />
 
 `qiskit.qasm2.QASM2Error(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/qasm2/exceptions.py "view source code")
@@ -180,6 +182,8 @@ Set the error message.
 
 In cases where the lexer or parser fails due to an invalid OpenQASM 2 file, the conversion functions will raise a more specific error with a message explaining what the failure is, and where in the file it occurred.
 
+### QASM2ParseError
+
 <span id="qiskit.qasm2.QASM2ParseError" />
 
 `qiskit.qasm2.QASM2ParseError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/qasm2/exceptions.py "view source code")
@@ -190,6 +194,8 @@ Set the error message.
 
 When the exporters fail to export a circuit, likely because it has structure that cannot be represented by OpenQASM 2.0, they will also emit a custom error.
 
+### QASM2ExportError
+
 <span id="qiskit.qasm2.QASM2ExportError" />
 
 `qiskit.qasm2.QASM2ExportError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/qasm2/exceptions.py "view source code")

diff --git a/docs/api/qiskit/qasm3.md b/docs/api/qiskit/qasm3.md
@@ -113,6 +113,8 @@ Convert the circuit to OpenQASM 3, returning the result as a string.
 
 All of these interfaces will raise [`QASM3ExporterError`](#qiskit.qasm3.QASM3ExporterError "qiskit.qasm3.QASM3ExporterError") on failure.
 
+### QASM3ExporterError
+
 <span id="qiskit.qasm3.QASM3ExporterError" />
 
 `qiskit.qasm3.QASM3ExporterError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/qasm3/exceptions.py "view source code")
@@ -234,6 +236,8 @@ a circuit representation of the OpenQASM 3 program.
 
 Both of these two functions raise [`QASM3ImporterError`](#qiskit.qasm3.QASM3ImporterError "qiskit.qasm3.QASM3ImporterError") on failure.
 
+### QASM3ImporterError
+
 <span id="qiskit.qasm3.QASM3ImporterError" />
 
 `qiskit.qasm3.QASM3ImporterError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/qasm3/exceptions.py "view source code")

diff --git a/docs/api/qiskit/qpy.md b/docs/api/qiskit/qpy.md
@@ -156,6 +156,8 @@ Which will save the qpy serialized circuit to the provided file.
 
 These functions will raise a custom subclass of [`QiskitError`](exceptions#qiskit.exceptions.QiskitError "qiskit.exceptions.QiskitError") if they encounter problems during serialization or deserialization.
 
+### QpyError
+
 <span id="qiskit.qpy.QpyError" />
 
 `qiskit.qpy.QpyError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/qpy/exceptions.py "view source code")

diff --git a/docs/api/qiskit/transpiler.md b/docs/api/qiskit/transpiler.md
@@ -938,6 +938,8 @@ See [https://arxiv.org/abs/2102.01682](https://arxiv.org/abs/2102.01682) for mor
 
 ### Exceptions
 
+### TranspilerError
+
 <span id="qiskit.transpiler.TranspilerError" />
 
 `qiskit.transpiler.TranspilerError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/transpiler/exceptions.py "view source code")
@@ -946,6 +948,8 @@ Exceptions raised during transpilation.
 
 Set the error message.
 
+### TranspilerAccessError
+
 <span id="qiskit.transpiler.TranspilerAccessError" />
 
 `qiskit.transpiler.TranspilerAccessError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/transpiler/exceptions.py "view source code")
@@ -954,6 +958,8 @@ DEPRECATED: Exception of access error in the transpiler passes.
 
 Set the error message.
 
+### CouplingError
+
 <span id="qiskit.transpiler.CouplingError" />
 
 `qiskit.transpiler.CouplingError(*msg)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/transpiler/exceptions.py "view source code")
@@ -962,6 +968,8 @@ Base class for errors raised by the coupling graph object.
 
 Set the error message.
 
+### LayoutError
+
 <span id="qiskit.transpiler.LayoutError" />
 
 `qiskit.transpiler.LayoutError(*msg)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/transpiler/exceptions.py "view source code")

diff --git a/docs/api/qiskit/visualization.md b/docs/api/qiskit/visualization.md
@@ -233,6 +233,8 @@ You can find code examples for each visualization functions on the individual fu
 
 ## Exceptions
 
+### VisualizationError
+
 <span id="qiskit.visualization.VisualizationError" />
 
 `qiskit.visualization.VisualizationError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.45/qiskit/visualization/exceptions.py "view source code")