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

• Cognitive Complexity docs
• Cognitive Complexity: A new way of measuring understandability

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:

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

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

• Cognitive Complexity docs
• Cognitive Complexity: A new way of measuring understandability

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:

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

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

• Cognitive Complexity docs
• Cognitive Complexity: A new way of measuring understandability

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:

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

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:

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

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

• Cognitive Complexity docs
• Cognitive Complexity: A new way of measuring understandability

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

• Cognitive Complexity docs
• Cognitive Complexity: A new way of measuring understandability

Cognitive Complexity is a measure of how hard the control flow of a function is to understand. Functions with high Cognitive Complexity will be difficult to maintain.

See

• Cognitive Complexity

Cognitive Complexity is a measure of how hard the control flow of a function is to understand. Functions with high Cognitive Complexity will be difficult to maintain.

See

• Cognitive Complexity

Cognitive Complexity is a measure of how hard the control flow of a function is to understand. Functions with high Cognitive Complexity will be difficult to maintain.

See

• Cognitive Complexity

Used when a function or method has too many local variables.

Used when a function or method has too many statements. You should then split it in smaller functions / methods.

Used when class has too many instance attributes, try to reduce this to get a simpler (and so easier to use) class.

Used when a function or a method has too many nested blocks. This makes the code less understandable and maintainable.

Used when a function or method has too many local variables.

Used when a function or method has too many branches, making it hard to follow.

Used when a function or method has too many statements. You should then split it in smaller functions / methods.

Used in order to highlight an unnecessary block of code following an if containing a break statement. As such, it will warn when it encounters an else following a chain of ifs, all of them containing a break statement.

Used when a function or method has too many branches, making it hard to follow.

Used when a function or method has too many statements. You should then split it in smaller functions / methods.

Used when a function or a method has too many nested blocks. This makes the code less understandable and maintainable.

Used in order to highlight an unnecessary block of code following an if containing a return statement. As such, it will warn when it encounters an else following a chain of ifs, all of them containing a return statement.

Merging collapsible if statements increases the code's readability.

Noncompliant Code Example

if condition1:
    if condition2:
        # ...

Compliant Solution

if condition1 and condition2:
    # ...

Used when a class defines a method which is hidden by an instance attribute from an ancestor class or set by some client code.

Used when pylint has been unable to import a module.

Used when a string is used as a statement (which of course has no effect). This is a particular case of W0104 with its own message so you can easily disable it if you're using those strings as documentation, instead of comments.

Used when an instance attribute is defined outside the init method.

Used when an instance attribute is defined outside the init method.

TODO self, src: Union[str, TCounter[str]], tar: Union[str, TCounter[str]] ^ |

Used when a single item in parentheses follows an if, for, or other keyword.

TODO not (row_covered[row]) ^ |

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

TODO self, ^ |

TODO tokenizer: Optional[_Tokenizer] = None, ^ |

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

TODO intersection_type: str = 'crisp', ^ |

TODO src: str, tar: str ^ |

Used when Pylint detects that len(sequence) is being used without explicit comparison inside a condition to determine if a sequence is empty. Instead of coercing the length to a boolean, either rely on the fact that empty sequences are false or compare the length against a scalar.

TODO 'normalizer' in self.params ^ |

TODO np.count_nonzero(starred[row, :]) == 0 ^ |

Used when Pylint detects that len(sequence) is being used without explicit comparison inside a condition to determine if a sequence is empty. Instead of coercing the length to a boolean, either rely on the fact that empty sequences are false or compare the length against a scalar.

Emitted when code that iterates with range and len is encountered. Such code can be simplified by using the enumerate builtin.

TODO **kwargs: Any ^ |

Used when Pylint detects that len(sequence) is being used without explicit comparison inside a condition to determine if a sequence is empty. Instead of coercing the length to a boolean, either rely on the fact that empty sequences are false or compare the length against a scalar.

Used when a single item in parentheses follows an if, for, or other keyword.

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

Used when a single item in parentheses follows an if, for, or other keyword.

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

Used when Pylint detects that len(sequence) is being used without explicit comparison inside a condition to determine if a sequence is empty. Instead of coercing the length to a boolean, either rely on the fact that empty sequences are false or compare the length against a scalar.

TODO self.params['alphabet'], Counter ^ |

Used when Pylint detects that len(sequence) is being used without explicit comparison inside a condition to determine if a sequence is empty. Instead of coercing the length to a boolean, either rely on the fact that empty sequences are false or compare the length against a scalar.

Emitted when code that iterates with range and len is encountered. Such code can be simplified by using the enumerate builtin.

TODO rowcovered[row] | colcovered[col] ^ |

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

TODO and self.params['normalizer'] in self.normdict ^ |

TODO and np.count_nonzero(starred[:, col]) == 0 ^ |

Used when a single item in parentheses follows an if, for, or other keyword.

Used when the name doesn't conform to naming rules associated to its type (constant, variable, class...).

Used when Pylint detects that len(sequence) is being used without explicit comparison inside a condition to determine if a sequence is empty. Instead of coercing the length to a boolean, either rely on the fact that empty sequences are false or compare the length against a scalar.

Emitted when code that iterates with range and len is encountered. Such code can be simplified by using the enumerate builtin.

TODO and arr[row, col] < h_val ^ |

TODO self.params['tokenizer'], (QGrams, QSkipgrams) ^ |

Used when Pylint detects that len(sequence) is being used without explicit comparison inside a condition to determine if a sequence is empty. Instead of coercing the length to a boolean, either rely on the fact that empty sequences are false or compare the length against a scalar.