diff --git a/tclcheck_allfull.py b/tclcheck_allfull.py
index 201712d..10525ba 100644
--- a/tclcheck_allfull.py
+++ b/tclcheck_allfull.py
@@ -11,8 +11,7 @@ from requests.exceptions import RequestException
 
 import tcllib
 import tcllib.argparser
-from tcllib import ansi
-from tcllib import devlist
+from tcllib import ansi, devlist
 from tcllib.devices import DesktopDevice
 
 
diff --git a/tclcheck_allota.py b/tclcheck_allota.py
index 0d8c2b3..20504ab 100644
--- a/tclcheck_allota.py
+++ b/tclcheck_allota.py
@@ -11,8 +11,7 @@ from requests.exceptions import RequestException
 
 import tcllib
 import tcllib.argparser
-from tcllib import ansi
-from tcllib import devlist
+from tcllib import ansi, devlist
 
 
 fc = tcllib.FotaCheck()
diff --git a/tclcheck_findprd.py b/tclcheck_findprd.py
index 02126e3..628bf08 100755
--- a/tclcheck_findprd.py
+++ b/tclcheck_findprd.py
@@ -12,8 +12,7 @@ from requests.exceptions import RequestException, Timeout
 
 import tcllib
 import tcllib.argparser
-from tcllib import ansi
-from tcllib import devlist
+from tcllib import ansi, devlist
 
 
 fc = tcllib.FotaCheck()
diff --git a/tclcheck_findprd2.py b/tclcheck_findprd2.py
index 9844c59..e97f7ad 100644
--- a/tclcheck_findprd2.py
+++ b/tclcheck_findprd2.py
@@ -11,8 +11,7 @@ from requests.exceptions import RequestException, Timeout
 
 import tcllib
 import tcllib.argparser
-from tcllib import ansi
-from tcllib import devlist
+from tcllib import ansi, devlist
 
 
 # Variants to scan for
diff --git a/tcllib/__init__.py b/tcllib/__init__.py
index 631b3e4..60c6ccd 100644
--- a/tcllib/__init__.py
+++ b/tcllib/__init__.py
@@ -9,8 +9,8 @@ import enum
 
 import requests
 
-from . import (dumpmgr, servervote, tclcheck,
-               tclchecksum, tclencheader, tclrequest)
+from . import (dumpmgr, servervote, tclcheck, tclchecksum, tclencheader,
+               tclrequest)
 
 
 def default_enum(enumname, vardict, qualroot="tcllib.FotaCheck"):
diff --git a/tcllib/devices.py b/tcllib/devices.py
index ea34419..6885ce3 100644
--- a/tcllib/devices.py
+++ b/tcllib/devices.py
@@ -3,6 +3,7 @@
 """Pseudo-devices for desktop/mobile requests"""
 
 class Device():
+    """Generic pseudo-device class."""
     CLTP_STATES = {
         "MOBILE": 10,     # only show actual newer versions or HTTP 206
         "DESKTOP": 2010,  # always show latest version for FULL updates
@@ -13,6 +14,7 @@ class Device():
     CKOT_STATES = {"ALL": 1, "AOTA_ONLY": 2, "FOTA_ONLY": 3}
 
     def __init__(self, curef, fwver):
+        """Populate variables."""
         self.curef = curef
         self.imei = ""
         self.osver = "7.1.1"
@@ -27,35 +29,39 @@ class Device():
         self.ua = "tcl"
 
     def is_rooted(self):
-        return (self.rtd == 1)
+        """Get RTD as boolean."""
+        return self.rtd == 1
 
     def set_rooted(self, new_state: bool):
-        if new_state:
-            self.rtd = 1
-        else:
-            self.rtd = 0
+        """Set RTD as integer."""
+        self.rtd = int(new_state)
 
     def set_cltp(self, new_cltp: str):
+        """Set CLTP while handling non-numeric input."""
         # (Numerical CLTPs can be set by direct assigns.)
         # Throws exception when invalid cltp given:
         self.cltp = self.CLTP_STATES[new_cltp]
 
     def set_mode(self, new_mode: str):
+        """Set MODE while handling non-numeric input."""
         # (Numerical MODEs can be set by direct assigns.)
         # Throws exception when invalid mode given:
         self.mode = self.MODE_STATES[new_mode]
 
     def set_chnl(self, new_chnl: str):
+        """Set CHNL while handling non-numeric input."""
         # (Numerical CHNLs can be set by direct assigns.)
         # Throws exception when invalid mode given:
         self.chnl = self.CHNL_STATES[new_chnl]
 
     def set_ckot(self, new_ckot: str):
+        """Set CKOT while handling non-numeric input."""
         # (Numerical CKOTs can be set by direct assigns.)
         # Throws exception when invalid mode given:
         self.ckot = self.CKOT_STATES[new_ckot]
 
 class MobileDevice(Device):
+    """Generic mobile (i.e. OTA) device."""
     def __init__(self, curef="PRD-63117-011", fwver="AAO472"):
         super().__init__(curef, fwver)
         self.imei = "3531510"
@@ -64,6 +70,7 @@ class MobileDevice(Device):
         self.ua = "com.tcl.fota/5.1.0.2.0029.0, Android"
 
 class DesktopDevice(Device):
+    """Generic desktop (i.e. full) device."""
     def __init__(self, curef="PRD-63117-011", fwver="AAA000"):
         super().__init__(curef, fwver)
         self.imei = "543212345000000"
diff --git a/tcllib/tclchecksum.py b/tcllib/tclchecksum.py
index 9030bc9..9b60d78 100644
--- a/tcllib/tclchecksum.py
+++ b/tcllib/tclchecksum.py
@@ -8,8 +8,10 @@
 import json
 
 from defusedxml import ElementTree
+
 from . import credentials
 
+
 class TclChecksumMixin:
     """A mixin component for TCL's checksum API."""
     def do_checksum(self, encslave, address, uri):