def average_complexity(blocks):
'''Compute the average Cyclomatic complexity from the given blocks.
Blocks must be either :class:`~radon.visitors.Function` or
:class:`~radon.visitors.Class`. If the block list is empty, then 0 is
returned.
'''
size = len(blocks)
if size == 0:
return 0
return sum((GET_COMPLEXITY(block) for block in blocks), .0) / len(blocks)
'''This module contains all high-level helpers function that allow to work with
Cyclomatic Complexity
'''
import math
from flake8_polyfill import options
from radon.visitors import GET_COMPLEXITY, ComplexityVisitor, code2ast
# sorted_block ordering functions
SCORE = lambda block: -GET_COMPLEXITY(block)
LINES = lambda block: block.lineno
ALPHA = lambda block: block.name
def cc_rank(cc):
r'''Rank the complexity score from A to F, where A stands for the simplest
and best score and F the most complex and worst one:
============= =====================================================
1 - 5 A (low risk - simple block)
6 - 10 B (low risk - well structured and stable block)
11 - 20 C (moderate risk - slightly complex block)
21 - 30 D (more than moderate risk - more complex block)
31 - 40 E (high risk - complex block, alarming)
41+ F (very high risk - error-prone, unstable block)
============= =====================================================
Here *block* is used in place of function, method or class.
The formula used to convert the score into an index is the following: