python3: use exec() instead of execfile()

src/calibre/debug.py

@@ -248,7 +248,8 @@ def run_script(path, args):
     g = globals()
     g['__name__'] = '__main__'
     g['__file__'] = ef
-    execfile(ef, g)
+    with open(ef, 'rb') as f:
+        exec(compile(f.read(), ef, 'exec'), g)
 
 
 def inspect_mobi(path):

src/calibre/library/catalogs/epub_mobi_builder.py

@@ -4602,7 +4602,9 @@ class CatalogBuilder(object):
         """
 
         templates = {}
-        execfile(P('catalog/section_list_templates.py'), templates)
+        ef = P('catalog/section_list_templates.py')
+        with open(ef, 'rb')) as f:
+            exec(compile(f.read(), ef, 'exec'), templates)
         for name, template in templates.iteritems():
             if name.startswith('by_') and name.endswith('_template'):
                 setattr(self, name, force_unicode(template, 'utf-8'))

src/calibre/utils/ipython.py

@@ -214,7 +214,8 @@ def ipython(user_ns=None):
     c = Config()
     user_conf = os.path.expanduser('~/.ipython/profile_default/ipython_config.py')
     if os.path.exists(user_conf):
-        execfile(user_conf, {'get_config': lambda: c})
+        with open(user_conf, 'rb') as f:
+            exec(compile(f.read(), user_conf, 'exec'), {'get_config': lambda: c})
     c.TerminalInteractiveShell.prompts_class = CustomPrompt
     c.InteractiveShellApp.exec_lines = [
         'from __future__ import division, absolute_import, unicode_literals, print_function',

src/calibre/utils/rapydscript.py

@@ -203,7 +203,8 @@ def compile_srv():
     base = base_dir()
     iconf = os.path.join(base, 'imgsrc', 'srv', 'generate.py')
     g = {'__file__': iconf}
-    execfile(iconf, g)
+    with open(iconf, 'rb') as f:
+        exec(compile(f.read(), iconf, 'exec'), g)
     icons = g['merge']().encode('utf-8')
     with lopen(os.path.join(base, 'resources', 'content-server', 'reset.css'), 'rb') as f:
         reset = f.read()