explicitly use python3

1-prepare-to-enter-marks

@@ -10,9 +10,9 @@ fi
 
 ln -sf $1 ___grades-template.txt
 # convert
-./scripts/init-spreadsheet-from-edoz.py $1
-
 echo ""
-echo "File `marks.xls` generated from edoz output. \
-     You can now fill points the points into the spreadsheet."
+echo -e "Generate file marks.xls from edoz output. "
 echo ""
+
+python3 ./scripts/init-spreadsheet-from-edoz.py $1 &&
+    echo "Next: enter the points in marks.xls."

2-generate-stats-and-edoz-upload

@@ -7,12 +7,12 @@ if [[ ! $? -eq 0 ]]; then
 fi
 
 # marks.xls -> marks.csv
-python scripts/xls2csv.py marks.xls marks.csv
+python3 scripts/xls2csv.py marks.xls marks.csv
 
 # generate tex-file
-R < knit.R --save 2> R.log || exit 1
+R --vanilla < knit.R --save 2> R.log || exit 1
 
-python scripts/pandas-script.py && echo "Generated edoz-final.txt for upload."
+python3 scripts/pandas-script.py && echo "Generated edoz-final.txt for upload."
 
 echo "Running pdflatex..."
 pdflatex statistics.tex > tex.log && pdflatex statistics.tex > /dev/null && echo "Successfully created statistics.pdf "