LiberTEM/LiberTEM

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src/libertem/executor/dask.py

Summary

Maintainability
C
1 day
Test Coverage

File dask.py has 608 lines of code (exceeds 400 allowed). Consider refactoring.
Open

import contextlib
from copy import deepcopy
import functools
import logging
import signal
Severity: Major
Found in src/libertem/executor/dask.py - About 7 hrs to fix

    Cyclomatic complexity is too high in function cluster_spec. (12)
    Open

    def cluster_spec(
        cpus: Union[int, Iterable[int]],
        cudas: Union[int, Iterable[int]],
        has_cupy: bool,
        name: str = 'default',
    Severity: Minor
    Found in src/libertem/executor/dask.py by radon

    Cyclomatic Complexity

    Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

    Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

    Construct Effect on CC Reasoning
    if +1 An if statement is a single decision.
    elif +1 The elif statement adds another decision.
    else +0 The else statement does not cause a new decision. The decision is at the if.
    for +1 There is a decision at the start of the loop.
    while +1 There is a decision at the while statement.
    except +1 Each except branch adds a new conditional path of execution.
    finally +0 The finally block is unconditionally executed.
    with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
    assert +1 The assert statement internally roughly equals a conditional statement.
    Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
    Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

    Source: http://radon.readthedocs.org/en/latest/intro.html

    Cyclomatic complexity is too high in method make_local. (11)
    Open

        @classmethod
        def make_local(cls, spec: Optional[dict] = None, cluster_kwargs: Optional[dict] = None,
                client_kwargs: Optional[dict] = None, preload: Optional[Tuple[str]] = None):
            """
            Spin up a local dask cluster
    Severity: Minor
    Found in src/libertem/executor/dask.py by radon

    Cyclomatic Complexity

    Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

    Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

    Construct Effect on CC Reasoning
    if +1 An if statement is a single decision.
    elif +1 The elif statement adds another decision.
    else +0 The else statement does not cause a new decision. The decision is at the if.
    for +1 There is a decision at the start of the loop.
    while +1 There is a decision at the while statement.
    except +1 Each except branch adds a new conditional path of execution.
    finally +0 The finally block is unconditionally executed.
    with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
    assert +1 The assert statement internally roughly equals a conditional statement.
    Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
    Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

    Source: http://radon.readthedocs.org/en/latest/intro.html

    Cyclomatic complexity is too high in method run_tasks. (9)
    Open

        def run_tasks(
            self,
            tasks: Iterable[TaskProtocol],
            params_handle: Any,
            cancel_id: Any,
    Severity: Minor
    Found in src/libertem/executor/dask.py by radon

    Cyclomatic Complexity

    Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

    Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

    Construct Effect on CC Reasoning
    if +1 An if statement is a single decision.
    elif +1 The elif statement adds another decision.
    else +0 The else statement does not cause a new decision. The decision is at the if.
    for +1 There is a decision at the start of the loop.
    while +1 There is a decision at the while statement.
    except +1 Each except branch adds a new conditional path of execution.
    finally +0 The finally block is unconditionally executed.
    with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
    assert +1 The assert statement internally roughly equals a conditional statement.
    Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
    Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

    Source: http://radon.readthedocs.org/en/latest/intro.html

    Cyclomatic complexity is too high in method get_resource_details. (7)
    Open

        def get_resource_details(self):
            workers = self.get_available_workers()
            details = {}
    
            for worker in workers:
    Severity: Minor
    Found in src/libertem/executor/dask.py by radon

    Cyclomatic Complexity

    Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

    Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

    Construct Effect on CC Reasoning
    if +1 An if statement is a single decision.
    elif +1 The elif statement adds another decision.
    else +0 The else statement does not cause a new decision. The decision is at the if.
    for +1 There is a decision at the start of the loop.
    while +1 There is a decision at the while statement.
    except +1 Each except branch adds a new conditional path of execution.
    finally +0 The finally block is unconditionally executed.
    with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
    assert +1 The assert statement internally roughly equals a conditional statement.
    Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
    Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

    Source: http://radon.readthedocs.org/en/latest/intro.html

    Cyclomatic complexity is too high in method run_each_partition. (6)
    Open

        def run_each_partition(self, partitions, fn, all_nodes=False):
            """
            Run `fn` for all partitions. Yields results in order of completion.
    
            Parameters
    Severity: Minor
    Found in src/libertem/executor/dask.py by radon

    Cyclomatic Complexity

    Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

    Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

    Construct Effect on CC Reasoning
    if +1 An if statement is a single decision.
    elif +1 The elif statement adds another decision.
    else +0 The else statement does not cause a new decision. The decision is at the if.
    for +1 There is a decision at the start of the loop.
    while +1 There is a decision at the while statement.
    except +1 Each except branch adds a new conditional path of execution.
    finally +0 The finally block is unconditionally executed.
    with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
    assert +1 The assert statement internally roughly equals a conditional statement.
    Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
    Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

    Source: http://radon.readthedocs.org/en/latest/intro.html

    Function run_each_partition has a Cognitive Complexity of 13 (exceeds 5 allowed). Consider refactoring.
    Open

        def run_each_partition(self, partitions, fn, all_nodes=False):
            """
            Run `fn` for all partitions. Yields results in order of completion.
    
            Parameters
    Severity: Minor
    Found in src/libertem/executor/dask.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

    Function get_resource_details has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
    Open

        def get_resource_details(self):
            workers = self.get_available_workers()
            details = {}
    
            for worker in workers:
    Severity: Minor
    Found in src/libertem/executor/dask.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

    Function run_tasks has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.
    Open

        def run_tasks(
            self,
            tasks: Iterable[TaskProtocol],
            params_handle: Any,
            cancel_id: Any,
    Severity: Minor
    Found in src/libertem/executor/dask.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

    Function make_local has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
    Open

        def make_local(cls, spec: Optional[dict] = None, cluster_kwargs: Optional[dict] = None,
                client_kwargs: Optional[dict] = None, preload: Optional[Tuple[str]] = None):
            """
            Spin up a local dask cluster
    
    
    Severity: Minor
    Found in src/libertem/executor/dask.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

    Function _validate_resources has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
    Open

        def _validate_resources(self, workers, resources):
            # This is set in the constructor of DaskJobExecutor
            if self.lt_resources:
                if not self._resources_available(workers, resources):
                    raise RuntimeError("Requested resources not available in cluster:", resources)
    Severity: Minor
    Found in src/libertem/executor/dask.py - About 25 mins 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 "cli_worker" has 8 parameters, which is greater than the 7 authorized.
    Open

            scheduler, local_directory, cpus, cudas, has_cupy, name, log_level, preload: Tuple[str]):
    Severity: Major
    Found in src/libertem/executor/dask.py by sonar-python

    A long parameter list can indicate that a new structure should be created to wrap the numerous parameters or that the function is doing too many things.

    Noncompliant Code Example

    With a maximum number of 4 parameters:

    def do_something(param1, param2, param3, param4, param5):
        ...
    

    Compliant Solution

    def do_something(param1, param2, param3, param4):
        ...
    

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