This program creates a password card as a pdf file generated with pdflatex. Each column beyond the first one corresponds to a different service for which a password is needed. The user must remember only a single master password and can use it to retrieve the password for each service: each letter of the master password in the first column corresponds to one symbol in the column of the desired service.
Each card is created from a user selectable seed. Any number n of services can be set by the user: for each letter of the alphabet a set of n randomly chosen symbols will be assigned.
The final result can be dumped to the standard output (print_card method) or to a pdf file (export_card method).
Finally, the method get_pass_word takes the master password and the desired service as inputs and gives the corresponding password as a result.