# create a list of strings
my_list = ["file1.tptprj", "file2.tptprj", "file3", "file4.tptprj"]
# iterate through the list
for item in my_list:
# check if the item has an extension
if "." in item:
# check if the extension is ".tptprj"
if item.endswith(".tptprj"):
# print "matrix"
print("source")
else:
# print "source"
print("matrix")
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