diff --git a/11/11.py b/11/11.py
index e7b9b8e..6f90aee 100755
--- a/11/11.py
+++ b/11/11.py
@@ -30,6 +30,7 @@ def check_flash(grid, f):
 
 
 def flash(grid, x, y, f):
+    # pylint: disable=R0912
     grid[y][x] = 0
     f += 1
     if y > 0:   # upper neighbours
diff --git a/11/11_2.py b/11/11_2.py
index 10606fb..a6249a9 100755
--- a/11/11_2.py
+++ b/11/11_2.py
@@ -30,6 +30,7 @@ def check_flash(grid, f):
 
 
 def flash(grid, x, y, f):
+    # pylint: disable=R0912
     grid[y][x] = 0
     f += 1
     if y > 0:   # upper neighbours
diff --git a/14/14.py b/14/14.py
index 3a29e82..96edb18 100755
--- a/14/14.py
+++ b/14/14.py
@@ -15,6 +15,7 @@ def parse_file(file):
 
 def step_poly(poly_str, ruleset):
     new_p = []
+    p = None
     for i, p in enumerate(poly_str):
         if i + 1 == len(poly_str):
             break
diff --git a/14/14_2.py b/14/14_2.py
index 2a5eb1f..4ef9f1e 100755
--- a/14/14_2.py
+++ b/14/14_2.py
@@ -53,13 +53,13 @@ for s in range(40):
 
 print(f'poly count: {poly_count}')
 
-elements = set([k for key in poly_count.keys() for k in (key[0], key[1])])
+elements = ([k for key, value in poly_count.items() for k in (key[0], key[1])])
 print(f'elements: {elements}')
 elem_count = dict.fromkeys(elements, 0)
 
-for polymer in poly_count.keys():
-    elem_count[polymer[0]] += poly_count[polymer]
-    elem_count[polymer[1]] += poly_count[polymer]
+for polymer, count in poly_count.items():
+    elem_count[polymer[0]] += count
+    elem_count[polymer[1]] += count
 
 # remove double count, and fix first and last element
 elem_count[first_last[0]] += 1
diff --git a/14/14_2_bad.py b/14/14_2_bad.py
index e5e12b8..eb15461 100755
--- a/14/14_2_bad.py
+++ b/14/14_2_bad.py
@@ -15,6 +15,7 @@ def parse_file(file):
 
 def step_poly(poly_str, ruleset):
     new_p = []
+    p = None
     l_poly = len(poly_str)
     for i, p in enumerate(poly_str):
         if i + 1 == l_poly:
diff --git a/9/9.py b/9/9.py
index eac8960..afa3872 100755
--- a/9/9.py
+++ b/9/9.py
@@ -21,6 +21,7 @@ def print_hmap(hmap):
 
 
 def find_lowpoints(hmap):
+    # pylint: disable=R0912
     lpoints = []
 
     # first line
diff --git a/9/9_2.py b/9/9_2.py
index 782cb27..488f15f 100755
--- a/9/9_2.py
+++ b/9/9_2.py
@@ -14,6 +14,7 @@ def parse_file(file):
 
 
 def find_lowpoints(hmap):
+    # pylint: disable=R0912
     lpoints = []
 
     # first line