diff --git a/voussoirkit/basenumber.py b/voussoirkit/basenumber.py
index 814087c..d45f4a5 100644
--- a/voussoirkit/basenumber.py
+++ b/voussoirkit/basenumber.py
@@ -19,8 +19,10 @@ def from_base(number, base, alphabet=None):
     if number.count('.') > 1:
         raise ValueError('Too many decimal points')
 
-    mixed_case = any(c in string.ascii_uppercase for c in alphabet) and \
-                 any(c in string.ascii_lowercase for c in alphabet)
+    mixed_case = (
+        any(c in string.ascii_uppercase for c in alphabet) and
+        any(c in string.ascii_lowercase for c in alphabet)
+    )
     if not mixed_case:
         alphabet = alphabet.upper()
         number = number.upper()
@@ -30,7 +32,7 @@ def from_base(number, base, alphabet=None):
     differences = char_set.difference(alpha_set)
     if len(differences) > 0:
         raise ValueError('Unknown characters for base', base, differences)
-    alpha_dict = {character:index for (index, character) in enumerate(alphabet)}
+    alpha_dict = {character: index for (index, character) in enumerate(alphabet)}
 
     try:
         decimal_pos = number.index('.')
@@ -45,7 +47,6 @@ def from_base(number, base, alphabet=None):
         if index < decimal_pos:
             power -= 1
         value = alpha_dict[character] * (base ** power)
-        #print(value)
         result += value
     return result
 
diff --git a/voussoirkit/bytestring.py b/voussoirkit/bytestring.py
index 60c2432..1b6c65d 100644
--- a/voussoirkit/bytestring.py
+++ b/voussoirkit/bytestring.py
@@ -1,10 +1,8 @@
 import re
 import sys
 
-from voussoirkit import clipext
 from voussoirkit import pipeable
 
-
 __VERSION__ = '0.0.1'
 
 BYTE = 1
diff --git a/voussoirkit/downloady.py b/voussoirkit/downloady.py
index b5bbe50..5ec95b3 100644
--- a/voussoirkit/downloady.py
+++ b/voussoirkit/downloady.py
@@ -1,13 +1,9 @@
 import argparse
 import os
-import pyperclip
 import requests
-import sys
-import time
 import urllib
 import warnings
 
-# pip install voussoirkit
 from voussoirkit import bytestring
 from voussoirkit import ratelimiter
 from voussoirkit import clipext
@@ -15,7 +11,7 @@ from voussoirkit import clipext
 warnings.simplefilter('ignore')
 
 HEADERS = {
-'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.152 Safari/537.36'
+    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.152 Safari/537.36'
 }
 
 FILENAME_BADCHARS = '*?"<>|\r\n'
@@ -72,7 +68,6 @@ def download_file(
         timeout=timeout,
         verify_ssl=verify_ssl,
     )
-    #print(plan)
     if plan is None:
         return
 
@@ -291,7 +286,6 @@ class Progress1:
         self.solid_char = '█'
 
     def step(self, bytes_downloaded):
-        #print(self.limiter.balance)
         percent = bytes_downloaded / self.total_bytes
         percent = min(1, percent)
         if self.limiter.limit(1) is False and percent < 1:
@@ -350,7 +344,7 @@ def basename_from_url(url):
     localname = localname.split('?')[0]
     localname = localname.split('/')[-1]
     return localname
-    
+
 def get_permission(prompt='y/n\n>', affirmative=['y', 'yes']):
     permission = input(prompt)
     return permission.lower() in affirmative
diff --git a/voussoirkit/eternalseptember.py b/voussoirkit/eternalseptember.py
index 4322fa5..9b72311 100644
--- a/voussoirkit/eternalseptember.py
+++ b/voussoirkit/eternalseptember.py
@@ -1,5 +1,4 @@
 import datetime
-import time
 
 EPOCH = datetime.datetime(
     year=1993,
diff --git a/voussoirkit/expressionmatch.py b/voussoirkit/expressionmatch.py
index fcebd15..9ee6b17 100644
--- a/voussoirkit/expressionmatch.py
+++ b/voussoirkit/expressionmatch.py
@@ -1,4 +1,3 @@
-import time
 ESCAPE_SEQUENCES = {
     '\\': '\\',
     '"': '"',
@@ -83,7 +82,6 @@ class ExpressionTree:
             if child.token in OPERATORS:
                 childstring = '(%s)' % childstring
             children.append(childstring)
-        #children = [str(child) for child in self.children]
 
         if len(children) == 1:
             return '%s %s' % (self.token, children[0])
@@ -106,12 +104,10 @@ class ExpressionTree:
             current = cls(token=tokens[0])
 
         for token in tokens[1:]:
-            ##print('  '*spaces, 'cur', current, current.token)
             if isinstance(token, list):
                 new = cls.parse(token, spaces=spaces+1)
             else:
                 new = cls(token=token)
-            ##print('  '*spaces, 'new', new)
 
             if 0 == 1:
                 pass
@@ -175,10 +171,7 @@ class ExpressionTree:
                 else:
                     raise Exception('Expected new to be my operand or parent binary.')
 
-            ##print('  '*spaces, 'fin:', current.rootmost(), '\n')
-
         current = current.rootmost()
-        ##print('---', current)
         return current
 
     def _evaluate(self, text, match_function=None):
@@ -187,7 +180,6 @@ class ExpressionTree:
                 match_function = DEFAULT_MATCH_FUNCTION
 
             value = match_function(text, self.token)
-            #print(self.token, value)
             return value
 
         operator_function = OPERATOR_FUNCTIONS[self.token]
@@ -319,7 +311,6 @@ def implied_tokens(tokens):
         if skip_this:
             continue
 
-        #print('tk:', token, 'hu:', has_unary_operator, 'hb:', has_binary_operator, 'ho:', has_operand)
         if isinstance(token, str) and token in OPERATORS:
             this_binary = token in BINARY_OPERATORS
             this_unary = not this_binary
@@ -370,7 +361,6 @@ def order_operations(tokens):
     slice_end = None
     precedence_stack = []
     while index < len(tokens):
-        #time.sleep(0.1)
         token = tokens[index]
         try:
             precedence = PRECEDENCE.index(token)
@@ -382,7 +372,6 @@ def order_operations(tokens):
             continue
         precedence_stack.append(precedence)
 
-
         if token in UNARY_OPERATORS:
             slice_start = index
             slice_end = index + 2
@@ -394,8 +383,6 @@ def order_operations(tokens):
             elif precedence_stack[-2] < precedence_stack[-1]:
                 slice_end = index
 
-        #print(tokens, index, token, precedence_stack, slice_start, slice_end, sep=' || ')
-
         if slice_start is None or slice_end is None:
             index += 1
             continue
@@ -432,7 +419,6 @@ def sublist_tokens(tokens, _from_index=0, depth=0):
     index = _from_index
     while index < len(tokens):
         token = tokens[index]
-        #print(index, token)
         index += 1
         if token is PAREN_OPEN:
             (token, index) = sublist_tokens(tokens, _from_index=index, depth=depth+1)
@@ -466,10 +452,9 @@ def tokenize(expression):
     tokens = []
     for character in expression:
         if in_escape:
-            #character = ESCAPE_SEQUENCES.get(character, '\\'+character)
             in_escape = False
 
-        elif character in  {'(', ')'} and not in_quotes:
+        elif character in {'(', ')'} and not in_quotes:
             if character == '(':
                 sentinel = PAREN_OPEN
                 paren_depth += 1
@@ -509,27 +494,10 @@ def tokenize(expression):
 
 if __name__ == '__main__':
     tests = [
-    #'test you AND(1 OR "harrison ford") AND (where are you) AND pg',
-    #'(you OR "AND ME")',
-    #'(3 XOR 2 OR 4',
-    #'1 NOT OR AND (2 OR (3 OR 4) OR (5 OR 6)))',
-    #'3 OR (5 OR)',
-    #'1 AND(4 OR "5 6")OR \\(test) 2',
-    #'1 2 AND (3 OR 4)',
-    #'AND 2',
-    #'1 AND 2 AND ("3 7" OR 6)AND (4 OR 5)',
-    #'NOT 1 AND NOT (2 OR 3)',
-    #'1 AND 2 AND 3 AND 4',
-    #'NOT 1 AND 2 OR 3 OR (5 AND 6)',
-    #'5 OR 6 AND 7 OR 8',
-    #'1 OR 2 AND 3 AND 4 OR 5 AND 6 OR 7 OR 8 AND 9',
-    #'2 XOR 3 AND 4',
-    #'1 OR (2 OR 3 AND 4)',
-    #'NOT XOR 4 7'
-    '[sci-fi] OR [pg-13]',
-    '([sci-fi] OR [war]) AND [r]',
-    '[r] XOR [sci-fi]',
-    '"mark hamill" "harrison ford"',
+        '[sci-fi] OR [pg-13]',
+        '([sci-fi] OR [war]) AND [r]',
+        '[r] XOR [sci-fi]',
+        '"mark hamill" "harrison ford"',
     ]
     teststrings = {
         'Star Wars': '[harrison ford] [george lucas] [sci-fi] [pg] [carrie fisher] [mark hamill] [space]',
diff --git a/voussoirkit/fusker.py b/voussoirkit/fusker.py
index 7eba573..ebc00b4 100644
--- a/voussoirkit/fusker.py
+++ b/voussoirkit/fusker.py
@@ -14,12 +14,14 @@ class Landmark:
 def barsplit(chars):
     wordlist = []
     wordbuff = []
+
     def flush():
         if not wordbuff:
             return
         word = fusk_join(wordbuff)
         wordlist.append(word)
         wordbuff.clear()
+
     for item in chars:
         if item == '|':
             flush()
diff --git a/voussoirkit/passwordy.py b/voussoirkit/passwordy.py
index 70432c9..aab6b22 100644
--- a/voussoirkit/passwordy.py
+++ b/voussoirkit/passwordy.py
@@ -137,7 +137,7 @@ def urandom_hex(length):
 
 
 def main_password(argv):
-    length  = listget(argv, 0, DEFAULT_LENGTH)
+    length = listget(argv, 0, DEFAULT_LENGTH)
     options = [a.lower() for a in argv[1:]]
 
     if '-' in length:
diff --git a/voussoirkit/pathclass.py b/voussoirkit/pathclass.py
index ad80daa..1a1ebe7 100644
--- a/voussoirkit/pathclass.py
+++ b/voussoirkit/pathclass.py
@@ -312,12 +312,10 @@ def get_path_casing(path):
 
     imaginary_portion = input_path.absolute_path
     imaginary_portion = imaginary_portion[len(cased):]
-    #real_portion = os.path.normcase(cased)
-    #imaginary_portion = imaginary_portion.replace(real_portion, '')
     imaginary_portion = imaginary_portion.lstrip(os.sep)
     cased = os.path.join(cased, imaginary_portion)
     cased = cased.rstrip(os.sep)
-    if not os.sep in cased:
+    if os.sep not in cased:
         cased += os.sep
     return cased
 
@@ -341,7 +339,6 @@ def glob_patternize(piece):
     for character in piece:
         if character not in '![]':
             replacement = '[%s]' % character
-            #print(piece, character, replacement)
             piece = piece.replace(character, replacement, 1)
             break
     return piece
diff --git a/voussoirkit/pipeable.py b/voussoirkit/pipeable.py
index babffb6..1969aab 100644
--- a/voussoirkit/pipeable.py
+++ b/voussoirkit/pipeable.py
@@ -1,4 +1,4 @@
-#import pyperclip moved to stay lazy.
+# import pyperclip moved to stay lazy.
 import sys
 
 builtin_input = input
diff --git a/voussoirkit/spinal.py b/voussoirkit/spinal.py
index f055c50..4470d10 100644
--- a/voussoirkit/spinal.py
+++ b/voussoirkit/spinal.py
@@ -1,4 +1,3 @@
-import collections
 import hashlib
 import logging
 import os
@@ -420,9 +419,12 @@ def copy_file(
     while True:
         try:
             data_chunk = source_handle.read(chunk_size)
-        except PermissionError as e:
-            print(source)
-            raise
+        except PermissionError as exception:
+            if callback_permission_denied is not None:
+                callback_permission_denied(source, exception)
+                return [destination, 0]
+            else:
+                raise
         data_bytes = len(data_chunk)
         if data_bytes == 0:
             break
diff --git a/voussoirkit/sqlhelpers.py b/voussoirkit/sqlhelpers.py
index 7533d20..8a4209e 100644
--- a/voussoirkit/sqlhelpers.py
+++ b/voussoirkit/sqlhelpers.py
@@ -111,7 +111,7 @@ def update_filler(pairs, where_key):
     return (qmarks, bindings)
 
 def hex_byte(byte):
-    if byte not in range (0, 256):
+    if byte not in range(0, 256):
         raise ValueError(byte)
     return hex(byte)[2:].rjust(2, '0')
 
diff --git a/voussoirkit/treeclass.py b/voussoirkit/treeclass.py
index 5af09f2..a8e5465 100644
--- a/voussoirkit/treeclass.py
+++ b/voussoirkit/treeclass.py
@@ -1,5 +1,3 @@
-import os
-
 class ExistingChild(Exception):
     pass