Currently only tested with Python 3.4.
Example usage as i3 keybindings:
bindsym $mod+Shift+i exec passdmenu.py -P bindsym $mod+Mod1+i exec passdmenu.py -uPt
usage: passdmenu.py [-h] [-c] [-t] [-r] [-u [GET_USER]] [-P] [-s STORE] [-d XDO_DELAY] [-f FILTER] [-B PASS_BIN] [-D DMENU_BIN] [-x XSEL] [-e EXECUTE] A dmenu frontend to pass. All passed arguments not listed below, are passed to dmenu. If you need to pass arguments to dmenu which are in conflict with the options below, place them after --. Requires xclip in default 'copy' mode. optional arguments: -h, --help show this help message and exit -c, --copy Use xclip to copy the username and/or password into the primary/specified xselection(s). This is the default mode. -t, --type Use xdotool to type the username and/or password into the currently active window. -r, --return Presses "Return" after typing. Forces --type. -u [GET_USER], --user [GET_USER] Copy/type the username, possibly search by given python regex pattern that must include a group (the user part). Example pattern: '^user: (.*)' If second line of gpg file is blank or the argument 'filename' is given then gpg filename is used as username. -P, --pw Copy/type the password. Default, use -u -P to copy both username and password. -s STORE, --store STORE The path to the pass password store. Defaults to ~/.password-store -d XDO_DELAY, --delay XDO_DELAY The delay between keystrokes. Defaults to xdotool's default. -f FILTER, --filter FILTER A regular expression to filter pass filenames. -B PASS_BIN, --pass PASS_BIN Defaults to /usr/bin/pass -D DMENU_BIN, --dmenu DMENU_BIN Defaults to /usr/bin/dmenu -x XSEL, --xsel XSEL The X selections into which to copy the username/password. Possible values are comma-separated lists of prefixes of: primary, secondary, clipboard. E.g. -x p,s,c. Defaults to primary. -e EXECUTE, --execute EXECUTE The path to a command to execute. The whole content of the decrypted gpg file from pass is provided to it on standard input. The full password name (within the store) is provided as first parameter. Arguments -s and -f are forwarded as parameters.The command is executed in addition to and after specified -t, -c options are handled.