Formatting: Format all python code with black.

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BUG=b:233893248
TEST=CQ

Change-Id: I66591d7a738d241aed3290138c0f68065ab10a6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3879174
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
diff --git a/scripts/sysmon/loop.py b/scripts/sysmon/loop.py
index 9301fc6..ab46344 100644
--- a/scripts/sysmon/loop.py
+++ b/scripts/sysmon/loop.py
@@ -14,37 +14,37 @@
 
 
 class SleepLoop(object):
-  """Sleep loop."""
+    """Sleep loop."""
 
-  def __init__(self, callback, interval=60):
-    """Initialize instance.
+    def __init__(self, callback, interval=60):
+        """Initialize instance.
 
-    Args:
-      callback: Function to call on each loop.
-      interval: Time between loops in seconds.
-    """
-    self._callback = callback
-    self._interval = interval
+        Args:
+          callback: Function to call on each loop.
+          interval: Time between loops in seconds.
+        """
+        self._callback = callback
+        self._interval = interval
 
-  def loop_once(self):
-    """Do actions for a single loop."""
-    try:
-      self._callback()
-    except Exception:
-      logger.exception(u'Error during loop.')
+    def loop_once(self):
+        """Do actions for a single loop."""
+        try:
+            self._callback()
+        except Exception:
+            logger.exception("Error during loop.")
 
-  def loop_forever(self):
-    while True:
-      self.loop_once()
-      _force_sleep(self._interval)
+    def loop_forever(self):
+        while True:
+            self.loop_once()
+            _force_sleep(self._interval)
 
 
 def _force_sleep(secs):
-  """Force sleep for at least the given number of seconds."""
-  now = time.time()
-  finished_time = now + secs
-  while now < finished_time:
-    remaining = finished_time - now
-    logger.debug(u'Sleeping for %d, %d remaining', secs, remaining)
-    time.sleep(remaining)
+    """Force sleep for at least the given number of seconds."""
     now = time.time()
+    finished_time = now + secs
+    while now < finished_time:
+        remaining = finished_time - now
+        logger.debug("Sleeping for %d, %d remaining", secs, remaining)
+        time.sleep(remaining)
+        now = time.time()