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src/qutip_qip/circuit/circuit.py

Summary

Maintainability
D
2 days
Test Coverage

Function adjacent_gates has a Cognitive Complexity of 41 (exceeds 20 allowed). Consider refactoring.
Open

    def adjacent_gates(self):
        """
        Method to resolve two qubit gates with non-adjacent control/s or
        target/s in terms of gates with adjacent interactions.
Severity: Minor
Found in src/qutip_qip/circuit/circuit.py - About 3 hrs to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function resolve_gates has a Cognitive Complexity of 39 (exceeds 20 allowed). Consider refactoring.
Open

    def resolve_gates(self, basis=["CNOT", "RX", "RY", "RZ"]):
        """
        Unitary matrix calculator for N qubits returning the individual
        steps as unitary matrices operating from left to right in the specified
        basis.
Severity: Minor
Found in src/qutip_qip/circuit/circuit.py - About 3 hrs to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function remove_gate_or_measurement has a Cognitive Complexity of 29 (exceeds 20 allowed). Consider refactoring.
Open

    def remove_gate_or_measurement(
        self, index=None, end=None, name=None, remove="first"
    ):
        """
        Remove a gate from a specific index or between two indexes or the
Severity: Minor
Found in src/qutip_qip/circuit/circuit.py - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Avoid deeply nested control flow statements.
Open

                        if end == gate.controls[0]:
                            temp.gates.append(
                                Gate(gate.name, targets=[i], controls=[i + 1])
                            )
                        else:
Severity: Major
Found in src/qutip_qip/circuit/circuit.py - About 45 mins to fix

    Avoid deeply nested control flow statements.
    Open

                            if end == gate.controls[0]:
                            temp.gates.append(
                                Gate(
                                    gate.name,
                                    targets=[i + 1],
    Severity: Major
    Found in src/qutip_qip/circuit/circuit.py - About 45 mins to fix

      Similar blocks of code found in 3 locations. Consider refactoring.
      Open

                      elif gate.name == "RY" and "RY" not in basis_1q:
                    qc_temp.gates.append(
                        Gate(
                            "RZ",
                            gate.targets,
      Severity: Major
      Found in src/qutip_qip/circuit/circuit.py and 2 other locations - About 2 hrs to fix
      src/qutip_qip/circuit/circuit.py on lines 622..645
      src/qutip_qip/circuit/circuit.py on lines 678..701

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 82.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 3 locations. Consider refactoring.
      Open

                      elif gate.name == "RZ" and "RZ" not in basis_1q:
                    qc_temp.gates.append(
                        Gate(
                            "RX",
                            gate.targets,
      Severity: Major
      Found in src/qutip_qip/circuit/circuit.py and 2 other locations - About 2 hrs to fix
      src/qutip_qip/circuit/circuit.py on lines 622..645
      src/qutip_qip/circuit/circuit.py on lines 650..673

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 82.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 3 locations. Consider refactoring.
      Open

                      if gate.name == "RX" and "RX" not in basis_1q:
                    qc_temp.gates.append(
                        Gate(
                            "RY",
                            gate.targets,
      Severity: Major
      Found in src/qutip_qip/circuit/circuit.py and 2 other locations - About 2 hrs to fix
      src/qutip_qip/circuit/circuit.py on lines 650..673
      src/qutip_qip/circuit/circuit.py on lines 678..701

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 82.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 2 locations. Consider refactoring.
      Open

                          elif (
                        start + end - i - i == 2 and (end - start + 1) % 2 == 1
                    ):
                        # Apply a swap between i and its adjacent gate, then
                        # the required gate if and then another swap if control
      Severity: Major
      Found in src/qutip_qip/circuit/circuit.py and 1 other location - About 1 hr to fix
      src/qutip_qip/circuit/circuit.py on lines 809..823

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 81.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 2 locations. Consider refactoring.
      Open

                          elif (start + end - i - i) == 2 and (
                        end - start + 1
                    ) % 2 == 1:
                        temp.gates.append(Gate("SWAP", targets=[i, i + 1]))
                        temp.gates.append(
      Severity: Major
      Found in src/qutip_qip/circuit/circuit.py and 1 other location - About 1 hr to fix
      src/qutip_qip/circuit/circuit.py on lines 764..797

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 81.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

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