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src/database/login.py

Summary

Maintainability
C
7 hrs
Test Coverage

Function authenticate has a Cognitive Complexity of 32 (exceeds 5 allowed). Consider refactoring.
Open

def authenticate(table, user_ID, password):
    """
    Authenticate login with entered user_ID and password
    Check table to match and return True if correct
    """
Severity: Minor
Found in src/database/login.py - About 4 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

Cyclomatic complexity is too high in function authenticate. (18)
Open

def authenticate(table, user_ID, password):
    """
    Authenticate login with entered user_ID and password
    Check table to match and return True if correct
    """
Severity: Minor
Found in src/database/login.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

Avoid too many return statements within this function.
Open

            return True
Severity: Major
Found in src/database/login.py - About 30 mins to fix

    Avoid too many return statements within this function.
    Open

        return False
    Severity: Major
    Found in src/database/login.py - About 30 mins to fix

      Avoid too many return statements within this function.
      Open

                      return True
      Severity: Major
      Found in src/database/login.py - About 30 mins to fix

        Avoid too many return statements within this function.
        Open

                    return False
        Severity: Major
        Found in src/database/login.py - About 30 mins to fix

          Avoid too many return statements within this function.
          Open

                      return False
          Severity: Major
          Found in src/database/login.py - About 30 mins to fix

            Avoid too many return statements within this function.
            Open

                        return True
            Severity: Major
            Found in src/database/login.py - About 30 mins to fix

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