use __import__ instead of exec

3 files changed, 3 insertions, 3 deletions

diff --git a/graders/lab1.py b/graders/lab1.py
index 66417af..f2c6c42 100755
--- a/graders/lab1.py
+++ b/graders/lab1.py
@@ -16,7 +16,7 @@ sys.path.insert(0, path.expanduser('~/submissions'))
 sys.dont_write_bytecode = True
 
 def run():
-	exec("import %s as submission" % importname)
+	submission = __import__(importname)
 	if submission.test() == 1:
 		return 100
 	else:
diff --git a/graders/lab2.py b/graders/lab2.py
index fa4c056..915afc0 100755
--- a/graders/lab2.py
+++ b/graders/lab2.py
@@ -17,7 +17,7 @@ sys.dont_write_bytecode = True
 
 output = ''
 def run():
-	exec("import %s as submission" % importname)
+	submission = __import__(importname)
 	global output
 	score = 0
 
diff --git a/graders/lab3.py b/graders/lab3.py
index 5d4fdb0..0a3300d 100755
--- a/graders/lab3.py
+++ b/graders/lab3.py
@@ -36,7 +36,7 @@ pizfiles = [('handout.piz', 3950), ('invalid.piz', 1050)]
 output = ''
 score = 0
 def run():
-	exec("import %s as submission" % importname)
+	submission = __import__(importname)
 	global output, score
 
 	pizzas = [