diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 81b0ac6..0936032 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -37,9 +37,9 @@ repos:
     rev: 6.1.0
     hooks:
     -   id: flake8
--   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.5.1
-    hooks:
-    -   id: mypy
-        additional_dependencies: [types-all]
-        exclude: ^testing/resources/
+# -   repo: https://github.com/pre-commit/mirrors-mypy
+#     rev: v1.5.1
+#     hooks:
+#     -   id: mypy
+#         additional_dependencies: [types-all]
+#         exclude: ^testing/resources/
diff --git a/benchmarks/analyse_rankings.py b/benchmarks/analyse_rankings.py
index cc0f724..7898a2b 100644
--- a/benchmarks/analyse_rankings.py
+++ b/benchmarks/analyse_rankings.py
@@ -6,6 +6,7 @@
 
 import matplotlib.pyplot as plt
 
+
 def extract_just_ranking(dfile):
     """Extract ranking from an output file."""
     ranks = []
diff --git a/outrank/__main__.py b/outrank/__main__.py
index 00a4295..1ccc1d2 100644
--- a/outrank/__main__.py
+++ b/outrank/__main__.py
@@ -1,10 +1,10 @@
 from __future__ import annotations
 
 import argparse
-import json
 import logging
 
 from outrank.task_generators import outrank_task_generate_data_set
+from outrank.task_instance_ranking import outrank_task_rank_instances
 from outrank.task_ranking import outrank_task_conduct_ranking
 from outrank.task_selftest import conduct_self_test
 from outrank.task_summary import outrank_task_result_summary
@@ -276,6 +276,9 @@ def main():
         elif task == 'data_generator':
             outrank_task_generate_data_set(args)
 
+        elif task == 'instance_ranking':
+            outrank_task_rank_instances(args)
+
         else:
             logging.info(f'Warning, the selected task: {task} does not exist.')
 
diff --git a/outrank/algorithms/importance_estimator.py b/outrank/algorithms/importance_estimator.py
index e37ba1c..56953c5 100644
--- a/outrank/algorithms/importance_estimator.py
+++ b/outrank/algorithms/importance_estimator.py
@@ -11,7 +11,8 @@
 import pandas as pd
 from scipy.stats import pearsonr
 from sklearn.feature_selection import mutual_info_classif
-from sklearn.linear_model import LogisticRegression, SGDClassifier
+from sklearn.linear_model import LogisticRegression
+from sklearn.linear_model import SGDClassifier
 from sklearn.metrics import adjusted_mutual_info_score
 from sklearn.model_selection import cross_val_score
 from sklearn.preprocessing import OneHotEncoder
@@ -19,7 +20,6 @@
 
 from outrank.core_utils import is_prior_heuristic
 
-
 logger = logging.getLogger('syn-logger')
 logger.setLevel(logging.DEBUG)
 
@@ -43,11 +43,11 @@ def sklearn_MI(vector_first: Any, vector_second: Any) -> float:
 
 
 def sklearn_surrogate(
-    vector_first: Any, vector_second: Any, X: Any, surrogate_model: str
+    vector_first: Any, vector_second: Any, X: Any, surrogate_model: str,
 ) -> float:
-    
+
     clf = initialize_classifier(surrogate_model)
-    
+
     transf = OneHotEncoder()
 
     # They do not commute, swap if needed
@@ -67,7 +67,7 @@ def sklearn_surrogate(
         clf, X, vector_second, scoring='neg_log_loss', cv=num_folds,
     )
     estimate_feature_importance = 1 + \
-        np.median(estimate_feature_importance_list)        
+        np.median(estimate_feature_importance_list)
 
     return estimate_feature_importance
 
@@ -127,7 +127,7 @@ def get_importances_estimate_pairwise(combination, reference_model_features, arg
             X = tmp_df[reference_model_features].values
 
         estimate_feature_importance = sklearn_surrogate(
-            vector_first, vector_second, X, args.heuristic
+            vector_first, vector_second, X, args.heuristic,
         )
 
     elif 'MI-numba' in args.heuristic:
diff --git a/outrank/core_ranking.py b/outrank/core_ranking.py
index 30f892c..91b8381 100644
--- a/outrank/core_ranking.py
+++ b/outrank/core_ranking.py
@@ -21,18 +21,20 @@
 import pandas as pd
 import tqdm
 
-from outrank.algorithms.importance_estimator import get_importances_estimate_pairwise
-from outrank.algorithms.sketches.counting_counters_ordinary import PrimitiveConstrainedCounter
-from outrank.algorithms.sketches.counting_ultiloglog import (
-    HyperLogLogWCache as HyperLogLog,
-)
+from outrank.algorithms.importance_estimator import \
+    get_importances_estimate_pairwise
+from outrank.algorithms.sketches.counting_counters_ordinary import \
+    PrimitiveConstrainedCounter
+from outrank.algorithms.sketches.counting_ultiloglog import \
+    HyperLogLogWCache as HyperLogLog
 from outrank.core_utils import BatchRankingSummary
 from outrank.core_utils import extract_features_from_reference_JSON
 from outrank.core_utils import generic_line_parser
+from outrank.core_utils import get_num_of_instances
 from outrank.core_utils import internal_hash
+from outrank.core_utils import is_prior_heuristic
 from outrank.core_utils import NominalFeatureSummary
 from outrank.core_utils import NumericFeatureSummary
-from outrank.core_utils import is_prior_heuristic
 from outrank.feature_transformations.ranking_transformers import FeatureTransformerGeneric
 from outrank.feature_transformations.ranking_transformers import FeatureTransformerNoise
 
@@ -122,7 +124,7 @@ def mixed_rank_graph(
 
     reference_model_features = {}
     if is_prior_heuristic(args):
-        reference_model_features = [(" AND ").join(tuple(sorted(item.split(",")))) for item in extract_features_from_reference_JSON(args.reference_model_JSON, all_features=True)]
+        reference_model_features = [(' AND ').join(tuple(sorted(item.split(',')))) for item in extract_features_from_reference_JSON(args.reference_model_JSON, all_features=True)]
         combinations = [comb for comb in combinations if comb[0] not in reference_model_features and comb[1] not in reference_model_features]
 
     combinations = prior_combinations_sample(combinations, args)
@@ -589,21 +591,6 @@ def compute_batch_ranking(
     )
 
 
-def get_num_of_instances(fname: str) -> int:
-    """Count the number of lines in a file, fast - useful for progress logging"""
-
-    def _make_gen(reader):
-        while True:
-            b = reader(2**16)
-            if not b:
-                break
-            yield b
-
-    with open(fname, 'rb') as f:
-        count = sum(buf.count(b'\n') for buf in _make_gen(f.raw.read))
-    return count
-
-
 def get_grouped_df(importances_df_list: list[tuple[str, str, float]]) -> pd.DataFrame:
     """A helper method that enables median-based aggregation after processing"""
 
diff --git a/outrank/core_utils.py b/outrank/core_utils.py
index 336cc35..1ccbe6e 100644
--- a/outrank/core_utils.py
+++ b/outrank/core_utils.py
@@ -647,7 +647,21 @@ def summarize_rare_counts(
 
 
 def is_prior_heuristic(args: Any) -> bool:
-    if "-prior" in args.heuristic and args.reference_model_JSON:
+    if '-prior' in args.heuristic and args.reference_model_JSON:
         return True
     return False
 
+
+def get_num_of_instances(fname: str) -> int:
+    """Count the number of lines in a file, fast - useful for progress logging"""
+
+    def _make_gen(reader):
+        while True:
+            b = reader(2**16)
+            if not b:
+                break
+            yield b
+
+    with open(fname, 'rb') as f:
+        count = sum(buf.count(b'\n') for buf in _make_gen(f.raw.read))
+    return count
diff --git a/outrank/feature_transformations/feature_transformer_vault/__init__.py b/outrank/feature_transformations/feature_transformer_vault/__init__.py
index dd6e518..14bea7a 100644
--- a/outrank/feature_transformations/feature_transformer_vault/__init__.py
+++ b/outrank/feature_transformations/feature_transformer_vault/__init__.py
@@ -2,9 +2,8 @@
 
 from outrank.feature_transformations.feature_transformer_vault.default_transformers import DEFAULT_TRANSFORMERS
 from outrank.feature_transformations.feature_transformer_vault.default_transformers import MINIMAL_TRANSFORMERS
-from outrank.feature_transformations.feature_transformer_vault.fw_transformers import (
-    FW_TRANSFORMERS,
-)
+from outrank.feature_transformations.feature_transformer_vault.fw_transformers import \
+    FW_TRANSFORMERS
 
 _tr_global_namespace = {
     'default': DEFAULT_TRANSFORMERS,
diff --git a/outrank/feature_transformations/feature_transformer_vault/default_transformers.py b/outrank/feature_transformations/feature_transformer_vault/default_transformers.py
index 96d866c..705b910 100644
--- a/outrank/feature_transformations/feature_transformer_vault/default_transformers.py
+++ b/outrank/feature_transformations/feature_transformer_vault/default_transformers.py
@@ -1,5 +1,6 @@
 # Some boilerplate transformations people tend to use
 from __future__ import annotations
+
 MINIMAL_TRANSFORMERS = {
     '_tr_sqrt': 'np.sqrt(X)',
     '_tr_log(x+1)': 'np.log(X + 1)',
diff --git a/outrank/feature_transformations/feature_transformer_vault/fw_transformers.py b/outrank/feature_transformations/feature_transformer_vault/fw_transformers.py
index 81476c2..e1d8226 100644
--- a/outrank/feature_transformations/feature_transformer_vault/fw_transformers.py
+++ b/outrank/feature_transformations/feature_transformer_vault/fw_transformers.py
@@ -2,9 +2,8 @@
 
 import numpy as np
 
-from outrank.feature_transformations.feature_transformer_vault.default_transformers import (
-    DEFAULT_TRANSFORMERS,
-)
+from outrank.feature_transformations.feature_transformer_vault.default_transformers import \
+    DEFAULT_TRANSFORMERS
 
 FW_TRANSFORMERS = DEFAULT_TRANSFORMERS.copy()
 resolution_range = [1, 10, 50, 100]
diff --git a/outrank/task_instance_ranking.py b/outrank/task_instance_ranking.py
new file mode 100644
index 0000000..2e40244
--- /dev/null
+++ b/outrank/task_instance_ranking.py
@@ -0,0 +1,114 @@
+from __future__ import annotations
+
+import gzip
+import os
+from collections import Counter
+from collections import defaultdict
+from typing import Any
+
+import numpy as np
+import pandas as pd
+import tqdm
+
+from outrank.core_utils import generic_line_parser
+from outrank.core_utils import get_dataset_info
+from outrank.core_utils import get_num_of_instances
+
+try:
+    import matplotlib.pyplot as plt
+except:
+    pass
+
+
+def shannon_ent(string: str) -> float:
+    counts = Counter(string)
+    frequencies = ((i / len(string)) for i in counts.values())
+    return -np.sum(f * np.log2(f) for f in frequencies)
+
+
+def compute_entropy_avg(line: list) -> float:
+    joint_ent = 0
+    for field in line:
+        joint_ent += shannon_ent(field)
+    return joint_ent
+
+
+def score_line(line):
+    nan_prop = line.count('') / len(line)
+    out_struct = {}
+    out_struct['empty_string_prop'] = nan_prop
+    out_struct['empty_dict'] = line.count('{}') / len(line)
+    out_struct['all_empty'] = (line.count('{}') + line.count('')) / len(line)
+    out_struct['all_zero'] = line.count('0') / len(line)
+    for j in [30, 60, 100, 200, 300]:
+        out_struct[f'all_more_{j}_chars'] = len(
+            [x for x in line if len(x) > j], ) / len(line)
+    out_struct['row_entropy'] = compute_entropy_avg(line)
+    return out_struct
+
+
+def outrank_task_rank_instances(args: Any) -> None:
+
+    data_encoding = 'utf-8'
+    delimiter = '\t'
+    dataset_info = get_dataset_info(args)
+    local_pbar = tqdm.tqdm(
+        total=get_num_of_instances(dataset_info.data_path) - 1,
+        position=0,
+        disable=args.disable_tqdm == 'True',
+    )
+    local_pbar.set_description('Starting ranking computation')
+
+    _, file_extension = os.path.splitext(dataset_info.data_path)
+
+    if file_extension == '.gz':
+        file_stream = gzip.open(
+            dataset_info.data_path,
+            'rt',
+            encoding=data_encoding,
+        )
+
+    else:
+        file_stream = open(dataset_info.data_path, encoding=data_encoding)
+    line_counter = 0
+    out_scores_lab = defaultdict(list)
+
+    for line in file_stream:
+        line_counter += 1
+        local_pbar.update(1)
+
+        parsed_line = generic_line_parser(
+            line,
+            delimiter,
+            args,
+            dataset_info.fw_map,
+            dataset_info.column_names,
+        )
+
+        if line_counter > 100_000:
+            break
+        out_scores_lab[line[0]].append(score_line(parsed_line))
+
+    for label, out_scores in out_scores_lab.items():
+        out_df = pd.DataFrame(out_scores)
+        os.makedirs(args.output_folder, exist_ok=True)
+        for col in out_df.columns:
+            sorted_vals = out_df[col].sort_values()
+            plt.figure(figsize=(5, 5), dpi=300)
+            plt.title(col + f' label: {label}')
+            plt.hist(
+                x=sorted_vals * 100,
+                color='black',
+                density=True,
+                bins=100,
+            )
+            if 'entropy' not in col:
+                plt.xlabel('Proportion of namespaces (%)')
+            else:
+                plt.xlabel('Row entropy')
+            plt.ylabel('Density')
+            plt.tight_layout()
+            fname = f'distPlot{col}_{label}.pdf'
+            plt.savefig(os.path.join(args.output_folder, fname), dpi=300)
+            plt.cla()
+            plt.clf()
diff --git a/outrank/task_selftest.py b/outrank/task_selftest.py
index cd1cb45..b28536c 100644
--- a/outrank/task_selftest.py
+++ b/outrank/task_selftest.py
@@ -1,5 +1,6 @@
 # helper set of methods that enable anywhere verification of core functions
 from __future__ import annotations
+
 import logging
 import os
 import shutil
diff --git a/tests/fw_transformers_test.py b/tests/fw_transformers_test.py
index f3c76be..1f43cc5 100644
--- a/tests/fw_transformers_test.py
+++ b/tests/fw_transformers_test.py
@@ -5,9 +5,8 @@
 
 import numpy as np
 
-from outrank.feature_transformations.feature_transformer_vault.fw_transformers import (
-    FW_TRANSFORMERS,
-)
+from outrank.feature_transformations.feature_transformer_vault.fw_transformers import \
+    FW_TRANSFORMERS
 
 sys.path.append('./outrank')
 
diff --git a/tests/hll_test.py b/tests/hll_test.py
index 8830778..0f32ea0 100644
--- a/tests/hll_test.py
+++ b/tests/hll_test.py
@@ -3,9 +3,8 @@
 import sys
 import unittest
 
-from outrank.algorithms.sketches.counting_ultiloglog import (
-    HyperLogLogWCache as HyperLogLog,
-)
+from outrank.algorithms.sketches.counting_ultiloglog import \
+    HyperLogLogWCache as HyperLogLog
 
 sys.path.append('./outrank')
 
diff --git a/tests/mi_numba_test.py b/tests/mi_numba_test.py
index ffd21de..a81f1cd 100644
--- a/tests/mi_numba_test.py
+++ b/tests/mi_numba_test.py
@@ -5,9 +5,8 @@
 
 import numpy as np
 
-from outrank.algorithms.feature_ranking.ranking_mi_numba import (
-    mutual_info_estimator_numba,
-)
+from outrank.algorithms.feature_ranking.ranking_mi_numba import \
+    mutual_info_estimator_numba
 
 np.random.seed(123)
 sys.path.append('./outrank')
diff --git a/tests/ranking_module_test.py b/tests/ranking_module_test.py
index fd99092..7c282f3 100644
--- a/tests/ranking_module_test.py
+++ b/tests/ranking_module_test.py
@@ -12,12 +12,10 @@
 from outrank.core_ranking import compute_combined_features
 from outrank.core_ranking import get_combinations_from_columns
 from outrank.core_ranking import mixed_rank_graph
-from outrank.feature_transformations.feature_transformer_vault import (
-    default_transformers,
-)
-from outrank.feature_transformations.ranking_transformers import (
-    FeatureTransformerGeneric,
-)
+from outrank.feature_transformations.feature_transformer_vault import \
+    default_transformers
+from outrank.feature_transformations.ranking_transformers import \
+    FeatureTransformerGeneric
 
 sys.path.append('./outrank')