1 files changed, 26 insertions, 26 deletions
diff --git a/glucometerutils/support/lifescan.py b/glucometerutils/support/lifescan.py
index 4df0b8f..13529ec 100644
--- a/glucometerutils/support/lifescan.py
+++ b/glucometerutils/support/lifescan.py
@@ -10,43 +10,43 @@ from glucometerutils import exceptions
 
 
 class MissingChecksum(exceptions.InvalidResponse):
-  """The response misses the expected 4-digits checksum."""
-  def __init__(self, response):
-    self.message = 'Response is missing checksum: %s' % response
+    """The response misses the expected 4-digits checksum."""
+    def __init__(self, response):
+        self.message = 'Response is missing checksum: %s' % response
 
 
 class InvalidSerialNumber(exceptions.Error):
-  """The serial number is not as expected."""
-  def __init__(self, serial_number):
-    self.message = 'Serial number %s is invalid.' % serial_number
+    """The serial number is not as expected."""
+    def __init__(self, serial_number):
+        self.message = 'Serial number %s is invalid.' % serial_number
 
 
 class MalformedCommand(exceptions.InvalidResponse):
-  def __init__(self, message):
-    exceptions.InvalidResponse.__init__(
-      self, 'Malformed command: %s' % message)
+    def __init__(self, message):
+        exceptions.InvalidResponse.__init__(
+          self, 'Malformed command: %s' % message)
 
 
 def crc_ccitt(data):
-  # type: (bytes) -> int
-  """Calculate the CRC-16-CCITT with LifeScan's common seed.
+    # type: (bytes) -> int
+    """Calculate the CRC-16-CCITT with LifeScan's common seed.
 
-  Args:
-    data: (bytes) the data to calculate the checksum of
+    Args:
+      data: (bytes) the data to calculate the checksum of
 
-  Returns:
-    (int) The 16-bit integer value of the CRC-CCITT calculated.
+    Returns:
+      (int) The 16-bit integer value of the CRC-CCITT calculated.
 
-  This function uses the non-default 0xFFFF seed as used by multiple
-  LifeScan meters.
-  """
-  crc = 0xffff
+    This function uses the non-default 0xFFFF seed as used by multiple
+    LifeScan meters.
+    """
+    crc = 0xffff
 
-  for byte in data:
-    crc = (crc >> 8) & 0xffff | (crc << 8) & 0xffff
-    crc ^= byte
-    crc ^= (crc & 0xff) >> 4
-    crc ^= (((crc << 8) & 0xffff) << 4) & 0xffff
-    crc ^= (crc & 0xff) << 5
+    for byte in data:
+        crc = (crc >> 8) & 0xffff | (crc << 8) & 0xffff
+        crc ^= byte
+        crc ^= (crc & 0xff) >> 4
+        crc ^= (((crc << 8) & 0xffff) << 4) & 0xffff
+        crc ^= (crc & 0xff) << 5
 
-  return (crc & 0xffff)
+    return (crc & 0xffff)