diff --git a/application/conf.py b/application/conf.py
index 9fb013c..4628672 100644
--- a/application/conf.py
+++ b/application/conf.py
@@ -12,4 +12,4 @@
 HEADERS = {
     "User-Agent": "Mozilla/5.0 (Windows NT 6.1; rv:52.0) Gecko/20100101 Firefox/52.0",
     "Accept-Language": "en-US,en;q=0.5",
-}
\ No newline at end of file
+}
diff --git a/application/defaults.py b/application/defaults.py
index 400a438..db8a6a6 100644
--- a/application/defaults.py
+++ b/application/defaults.py
@@ -3,4 +3,4 @@
 
 THREADS = 1
 TIMEOUT = 5
-DELAY = 1
\ No newline at end of file
+DELAY = 1
diff --git a/application/helpers.py b/application/helpers.py
index c269dfc..e7313fa 100644
--- a/application/helpers.py
+++ b/application/helpers.py
@@ -12,4 +12,4 @@ def readTextFile(filePath):
     return ts.readAll()
 
 def writeTextFile(filePath, fileContents):
-    pass
\ No newline at end of file
+    pass
diff --git a/application/utils.py b/application/utils.py
index 04500cc..2302e71 100644
--- a/application/utils.py
+++ b/application/utils.py
@@ -1,14 +1,14 @@
 # -*- coding: UTF-8 -*-
 #!/usr/bin/env python
 
-from time import sleep
-from urllib.parse import urljoin, urlparse
+#from time import sleep
+from urllib.parse import urlparse
 
 from lxml import etree
 import requests
 
-from .conf import HEADERS
-from .defaults import TIMEOUT
+from application.conf import HEADERS
+from application.defaults import TIMEOUT
 
 def check_alexa(url, timeout=TIMEOUT):
     rank = None
@@ -34,9 +34,48 @@ def check_alexa(url, timeout=TIMEOUT):
     return rank, status, msg
 
 def extract_domain(url):
+    """
+    Extracts domain from url
+
+    Parameters
+    ----------
+    url : str
+        Full url address
+
+    Returns
+    -------
+    str
+        Url domain
+
+    Examples
+    --------
+    >>> extract_domain("https://www.python.org/about/")
+    'www.python.org'
+    """
     return urlparse(url).netloc
 
 def split_list(li, n):
+    """
+    Split list into n lists
+
+    Parameters
+    ----------
+    li : list
+        List to split
+
+    n : int
+        Split count
+
+    Returns
+    -------
+    list
+        List of n lists
+
+    Examples
+    --------
+    >>> split_list([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 3)
+    [[1, 2, 3, 4], [5, 6, 7], [8, 9, 10]]
+    """
     k, m = divmod(len(li), n)
 
-    return (li[i * k + min(i, m):(i + 1) * k + min(i + 1, m)] for i in range(n))
\ No newline at end of file
+    return [li[i * k + min(i, m):(i + 1) * k + min(i + 1, m)] for i in range(n)]
\ No newline at end of file
diff --git a/application/version.py b/application/version.py
index 768b4ae..3adca41 100644
--- a/application/version.py
+++ b/application/version.py
@@ -1,4 +1,4 @@
 # -*- coding: UTF-8 -*-
 # !/usr/bin/env python
 
-__version__ = "0.5.12.1"
\ No newline at end of file
+__version__ = "0.5.12.1"
diff --git a/main.py b/main.py
index 42b3bd1..39b1cfe 100644
--- a/main.py
+++ b/main.py
@@ -1,10 +1,9 @@
 # -*- coding: UTF-8 -*-
 # !/usr/bin/env python
 
-import os
 import sys
 
-from PyQt5 import uic, QtWidgets
+from PyQt5 import QtWidgets
 
 from application.mainwindow import MainWindow
 from application.conf import __author__, __title__
@@ -18,4 +17,4 @@
     app.setStyleSheet("QStatusBar::item { border: 0px solid black };")
     mainWindow = MainWindow()
     mainWindow.show()
-    app.exec_()
\ No newline at end of file
+    app.exec_()