File `graph.py` has 488 lines of code (exceeds 250 allowed). Consider refactoring.
Open

#
#  graph.py
#
#  Copyright (c) 2016-2023 Junpei Kawamoto
#

Found in fraud_eagle/graph.py - About 7 hrs to fix

Function `psi` has a Cognitive Complexity of 24 (exceeds 5 allowed). Consider refactoring.
Open

def psi(u_label: UserLabel, p_label: ProductLabel, r_label: ReviewLabel, epsilon: float) -> float:
    """Likelihood of a pair of user and product.

    The likelihood is dependent on the review of the user gives the product.
    The review is one of {+, -}. We defined constant representing "+" and "-",

Found in fraud_eagle/likelihood.py - About 3 hrs to fix

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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"

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 update. (10)
Open

    def update(self) -> float:
        """Update reviewers' anomalous scores and products' summaries.

        For each user :math:`u`, update messages to every product :math:`p`
        the user reviews. The message function :math:`m_{u\\rightarrow p}`

Found in fraud_eagle/graph.py by radon

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Exclude checks
- Disable engine
- Disable check

Cyclomatic Complexity

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 `update` has a Cognitive Complexity of 18 (exceeds 5 allowed). Consider refactoring.
Open

    def update(self) -> float:
        """Update reviewers' anomalous scores and products' summaries.

        For each user :math:`u`, update messages to every product :math:`p`
        the user reviews. The message function :math:`m_{u\\rightarrow p}`

Found in fraud_eagle/graph.py - About 2 hrs to fix

Read up
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Cognitive Complexity

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"

There are still many devices around that are limited to 80 character
lines; plus, limiting windows to 80 characters makes it possible to
have several windows side-by-side.  The default wrapping on such
devices looks ugly.  Therefore, please limit all lines to a maximum
of 79 characters. For flowing long blocks of text (docstrings or
comments), limiting the length to 72 characters is recommended.

Reports error E501.