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eight0153/CartPole-NEAT

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neat/genome.py

Summary

Maintainability
A
35 mins
Test Coverage
A
97%

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

            if random.random() < Genome.p_perturb:
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

        if random.random() < Genome.p_add_node:
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

        elif random.random() < Genome.p_add_connection:
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

        gene = random.choice(disabled_genes)
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

        combine_by_average = random.random() < Genome.p_mate_average
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

                    random.random() < Genome.p_perturb:
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

        connection_to_split = random.choice(enabled_connections)
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

        if random.random() < Genome.p_re_enable_connection:
Severity: Info
Found in neat/genome.py by bandit

Standard pseudo-random generators are not suitable for security/cryptographic purposes.
Open

            genes = [gene1 if random.random() < 0.5 else gene2
Severity: Info
Found in neat/genome.py by bandit

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

    def _perturb(self):
        """Add a small positive or negative number to the weights and biases
        in the connection and node genes.
        """
        for node_gene in self.node_genes:
Severity: Minor
Found in neat/genome.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 _perturb has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

    def _perturb(self):
        """Add a small positive or negative number to the weights and biases
        in the connection and node genes.
        """
        for node_gene in self.node_genes:
Severity: Minor
Found in neat/genome.py - About 35 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

Line too long (85 > 79 characters)
Open

            ConnectionGene(connection_to_split.connection.input_id, new_node.node.id)
Severity: Minor
Found in neat/genome.py by pep8

Limit all lines to a maximum of 79 characters.

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.

Line too long (85 > 79 characters)
Open

            ConnectionGene(new_node.node.id, connection_to_split.connection.input_id)
Severity: Minor
Found in neat/genome.py by pep8

Limit all lines to a maximum of 79 characters.

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.

Blank line at end of file
Open

Severity: Minor
Found in neat/genome.py by pep8

Trailing blank lines are superfluous.

Okay: spam(1)
W391: spam(1)\n

However the last line should end with a new line (warning W292).

There are no issues that match your filters.

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