[taping] add typing hint for BaseSite._locked_pages

Change-Id: I07cce2ead8eb282384cb5dbac996443566641c3e
---
M pywikibot/throttle.py
M pywikibot/site/_basesite.py
2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/pywikibot/site/_basesite.py b/pywikibot/site/_basesite.py
index ea47b94..57a8eab 100644
--- a/pywikibot/site/_basesite.py
+++ b/pywikibot/site/_basesite.py
@@ -11,7 +11,7 @@
 from warnings import warn
 
 import pywikibot
-from pywikibot.backports import List, Pattern
+from pywikibot.backports import List, Pattern, Set
 from pywikibot.exceptions import (
     Error,
     FamilyMaintenanceWarning,
@@ -95,7 +95,7 @@
 
         # following are for use with lock_page and unlock_page methods
         self._pagemutex = threading.Condition()
-        self._locked_pages = set()
+        self._locked_pages: Set[str] = set()
 
     @property
     @cached
diff --git a/pywikibot/throttle.py b/pywikibot/throttle.py
index bb427f0..825bfa3 100644
--- a/pywikibot/throttle.py
+++ b/pywikibot/throttle.py
@@ -65,13 +65,13 @@
         self.mindelay = mindelay or config.minthrottle
         self.maxdelay = maxdelay or config.maxthrottle
         self.writedelay = writedelay or config.put_throttle
-        self.last_read = 0
-        self.last_write = 0
+        self.last_read = 0.0
+        self.last_write = 0.0
         self.next_multiplicity = 1.0
 
         self.retry_after = 0  # set by http.request
         self.delay = 0
-        self.checktime = 0
+        self.checktime = 0.0
         self.modules = Counter()
 
         self.checkMultiplicity()

