You may want to create an additional set of problems for your students to provide them additional practice as a preparation of midterm or final exam. You may do it by concatenating existing WeBWorK assignments and assigning them to your students.

To do it, follow these steps.

1. Go to WeBWorK, click on "File manager" tab. Download all source files of interest (.def - files for the assignments in question) to a single folder.

2. Run python script via the terminal

$ python merge_files.py -input_folder=./storage -output_folder=./output -noweight -filename=setAssignment.def

Replace ./storage by a link to the folder that contains all downloaded assignments source files. Output folder (./output) is the folder where the output will be created. If folder does not exist, it will be created. Add the flag ```-noweight`` if you want all problems to have zero points.

Finally, specify the filename. Note that WeBWorK only accepts assignments which start from set and whose extension is .def

3. Upload the new file to the WeBWorK via the "File manager" tool.

4. Go to "Hmwk sets editor" and Import the file.