Use dict.fromkeys where possible

Author: QuLogic

galleries/examples/showcase/stock_prices.py

@@ -42,7 +42,7 @@
                  'ADBE', 'GSPC', 'IXIC']
 
 # Manually adjust the label positions vertically (units are points = 1/72 inch)
-y_offsets = {k: 0 for k in stocks_ticker}
+y_offsets = dict.fromkeys(stocks_ticker, 0)
 y_offsets['IBM'] = 5
 y_offsets['AAPL'] = -5
 y_offsets['AMZN'] = -6

lib/matplotlib/axes/_base.py

@@ -646,7 +646,7 @@ def __init__(self, fig,
         self._aspect = 'auto'
         self._adjustable = 'box'
         self._anchor = 'C'
-        self._stale_viewlims = {name: False for name in self._axis_names}
+        self._stale_viewlims = dict.fromkeys(self._axis_names, False)
         self._forward_navigation_events = forward_navigation_events
         self._sharex = sharex
         self._sharey = sharey