• There are 363 files with units, with 82,002 lines of code.
• 10 very complex files (McCabe index sum 251+; 15,738 lines of code)
• 27 complex files (McCabe index sum 126-250; 18,388 lines of code)
• 58 medium complex files (McCabe index sum 51-125; 21,644 lines of code)
• 59 slightly complex files (McCabe index sum 26-50; 11,055 lines of code)
• 209 simple files (McCabe index sum 1-25; 15,177 lines of code)
• 117 main files have no units (e.g. languages without unit analysis, or files without functions) and are not classified.

The McCabe index of a file grows with its size: per 100 lines tells a large but plain file from a dense one, and most complex unit whether the complexity sits in one unit or is spread over many.

File	# lines	# units	McCabe index (sum)	per 100 lines	most complex unit
argo_workflows.py in metaflow/plugins/argo	3836	225	767	20	119
typing_extensions.py in metaflow/_vendor/v3_6	1505	186	524	35	47
typing_extensions.py in metaflow/_vendor	1935	183	500	26	23
typing_extensions.py in metaflow/_vendor/v3_7	1581	164	433	27	17
emitter.py in metaflow/_vendor/yaml	953	60	380	40	30
core.py in metaflow/client	1142	138	365	32	19
scanner.py in metaflow/_vendor/yaml	878	72	354	40	32
runtime.py in metaflow	1931	69	332	17	44
core.py in metaflow/_vendor/click	1126	106	324	29	25
__init__.py in metaflow/extension_support	851	28	263	31	108
s3.py in metaflow/plugins/datatools/s3	1058	56	222	21	57
step_functions.py in metaflow/plugins/aws/step_functions	967	59	218	23	49
stub_generator.py in metaflow/cmd/develop	1334	29	200	15	53
_transformer.py in metaflow/_vendor/typeguard	953	49	198	21	17
_transformer.py in metaflow/_vendor/v3_7/typeguard	939	50	196	21	17
s3op.py in metaflow/plugins/datatools/s3	1086	31	193	18	56
flowspec.py in metaflow	723	37	191	26	34
kubernetes_jobsets.py in metaflow/plugins/kubernetes	888	62	177	20	24
constructor.py in metaflow/_vendor/yaml	628	51	175	28	18
task_datastore.py in metaflow/datastore	698	51	171	24	17
__init__.py in metaflow/_vendor/importlib_metadata	530	100	166	31	7
__init__.py in metaflow/_vendor/v3_7/importlib_metadata	530	100	166	31	7
__init__.py in metaflow/_vendor/v3_6/importlib_metadata	530	100	166	31	7
conda_environment.py in metaflow/plugins/pypi	444	26	163	37	54
_termui_impl.py in metaflow/_vendor/click	493	35	161	33	17
_compat.py in metaflow/_vendor/click	547	66	159	29	23
decorators.py in metaflow	684	53	155	23	14
graph.py in metaflow	482	19	154	32	27
components.py in metaflow/plugins/cards/card_modules	781	55	151	19	9
types.py in metaflow/_vendor/click	458	48	150	33	20
component_serializer.py in metaflow/plugins/cards	521	51	145	28	20
server.py in metaflow/plugins/env_escape	454	30	145	32	55
kubernetes_job.py in metaflow/plugins/kubernetes	556	31	145	26	34
util.py in metaflow	371	35	139	37	18
lint.py in metaflow	436	28	138	32	21
configure_cmd.py in metaflow/cmd	770	34	130	17	11
airflow_utils.py in metaflow/plugins/airflow	527	41	129	24	21
airflow.py in metaflow/plugins/airflow	621	18	124	20	31
basic.py in metaflow/plugins/cards/card_modules	653	55	122	19	28
argo_workflows_cli.py in metaflow/plugins/argo	1166	25	122	10	21
metadata.py in metaflow/metadata_provider	452	47	122	27	13
kubernetes_decorator.py in metaflow/plugins/kubernetes	473	10	115	24	50
parser.py in metaflow/_vendor/yaml	412	31	111	27	29
specifiers.py in metaflow/_vendor/packaging	322	46	110	34	15
batch_client.py in metaflow/plugins/aws/batch	662	56	108	16	7
serializer.py in metaflow/datastore/artifacts	415	28	106	26	11
parser.py in metaflow/_vendor/click	256	20	102	40	14
convert_to_native_type.py in metaflow/plugins/cards/card_modules	375	37	102	27	14
user_step_decorator.py in metaflow/user_decorators	409	29	101	25	20
task.py in metaflow	793	10	97	12	33

• File complexity is the sum of the McCabe indexes (conditional complexity) of the units (methods, functions...) in a file.
• Files are classified in five categories based on that sum: 1-25 (simple files), 26-50 (slightly complex files), 51-125 (medium complex files), 126-250 (complex files), 251+ (very complex files). The default bands are five times the unit complexity bands, as a file is a group of units.
• Only main code files with units are classified. Files without units (languages without unit analysis, or files without functions) have no complexity to measure and are left out rather than counted as simple.
• A very complex file holds many decisions, which often means it has too many responsibilities: a candidate to split, and a place where changes need more testing.