usage: download_reference_from_Vizier.py [-h] [--config [CONFIG]] --output
                                             [OUTPUT] [--plot]
                                             [--catalog {gaiadr2,gaiadr2_G,psdr1_r,psdr1,smssdr1.1_r,smssdr1.1,vhsdr4}]
                                             [--min_ra [MIN_RA]]
                                             [--max_ra [MAX_RA]]
                                             [--min_dec [MIN_DEC]]
                                             [--max_dec [MAX_DEC]]
                                             [--center_ra [CENTER_RA]]
                                             [--width_ra [WIDTH_RA]]
                                             [--center_dec [CENTER_DEC]]
                                             [--width_dec [WIDTH_DEC]] [--filter]
                                             [--exbox_min_ra [EXBOX_MIN_RA]]
                                             [--exbox_max_ra [EXBOX_MAX_RA]]
                                             [--exbox_min_dec [EXBOX_MIN_DEC]]
                                             [--exbox_max_dec [EXBOX_MAX_DEC]]
                                             [--stitch STITCH]
                                             [--server {cds,cadc,cam,cfa}]
                                             [--verbose]
     download_reference_from_Vizier.py: error: the following arguments are required: --output
  

>>from PyVI import image_db
>>from PyVI import curses_interface
>>infn="list.txt"
>>outfn="log.txt"
>>dir_images="./Images/"
>>db = image_db(infn, outfn, dir_images)
>>db_inf = curses_interface(db, infn)

PyVI.py [list filename] [log filename] -d [the directory name of image files]
                Example) PyVI.py sel.list log.list -d ./Gallery
                -d : directory name is optional

>>from PyVI import image_db
>>from PyVI import curses_interface
>>infn="list.txt"
>>outfn="log.txt"
>>dir_images="./Images/"
>>dir_texts="./Texts/"
>>db = image_db(infn, outfn, dir_images, dir_texts)
>>db_inf = curses_interface(db, infn)

PyVI.py [list filename] [log filename] -i [the directory name of image files] -t [the directory name of text files]
                Example) PyVI.py sel.list log.list -i ./Gallery -t ./Texts
                -i and -t : optional

>>from PyVI import image_db
>>from PyVI import curses_interface
>>infn="list.txt"
>>outfn="log.txt"
>>dir_images="./Images/"
>>dir_texts="./Texts/"
>>db = image_db(infn, outfn, dir_images, dir_texts)
>>use_fits = 1 # if you want to use FITS images
>>import ds9
>>db_inf = curses_interface(db, infn)

PyVI.py [list filename] [log filename] -f -i [the directory name of image files] -t [the directory name of text files]
                Example) PyVI.py sel.list log.list -f -i ./Gallery -t ./Extra_text
                -f : if your image files are FITS files, use this option. PyVI will use the DS9 FITS viewer. You need to open the DS9 with -xpa option. 
                     If the DS9 viewer is not available for PyVI, PyVI tries to open it.
                -i and -t : the directory names are optional
                if the directory names are not given, the current working directory is a default directory.

>>from PyVI import image_db
>>from PyVI import curses_interface
>>infn="list.txt"
>>outfn="log.txt"
>>dir_images="./Images/"
>>dir_texts="./Texts/"
>>db = image_db(infn, outfn, dir_images, dir_texts)
>>use_fits = 1 # if you want to use FITS images with DS9.
>>use_fits = 2 # if you want to use FITS images with Aladin.
>>use_fits = 3 # if you want to use FITS images with both DS9 and Aladin.
>>import sampy
>>db_inf = curses_interface(db, infn)

PyVI.py [list filename] [log filename] --ds9 --aladin --image_dir [the directory name of image files] --text_dir [the directory name of text files]
		Example) PyVI.py sel.list log.list --ds9 --image_dir ./Gallery --text_dir ./Extra_text
		--ds9 : PyVI will use the DS9 as an image viewer which supports FITS files. You must check the DS9 first whether it is available with the SAMP.
		--aladin : PyVI will use the Aladin as an image viewer which supports FITS and other file formats such as JPEG and PNG. You must check the Aladin first whether it is available with the SAMP. If both --ds9 and --aladin options are selected, both viewers are used in the PyVI.
		--image_dir and --text_dir : the directory names are optional
		if the directory names are not given, the current working directory is a default directory.

>>from PyVI import image_db
>>from PyVI import curses_interface
>>infn="list.txt"
>>outfn="log.txt"
>>dir_images="./Images/"
>>dir_texts="./Texts/"
>>db = image_db(infn, outfn, dir_images, dir_texts)
>>use_fits = 1 # if you want to use FITS images with DS9.
>>use_fits = 2 # if you want to use FITS images with Aladin.
>>use_fits = 3 # if you want to use FITS images with both DS9 and Aladin.
>>import sampy
>>db_inf = curses_interface(db, infn)

PyVI.py [list filename] [log filename] --ds9 --aladin --image_dir [the directory name of image files] --text_dir [the directory name of text files]
		Example) PyVI.py sel.list log.list --ds9 --image_dir ./Gallery --text_dir ./Extra_text
		--ds9 : PyVI will use the DS9 as an image viewer which supports FITS files. You must check the DS9 first whether it is available with the SAMP.
		--aladin : PyVI will use the Aladin as an image viewer which supports FITS and other file formats such as JPEG and PNG. You must check the Aladin first whether it is available with the SAMP. If both --ds9 and --aladin options are selected, both viewers are used in the PyVI.
		--general : PyVI will use a general FITS image viewer including JSky, DS9, and Aladin. You must check the viewer first whether it is available with the SAMP. However, do not use --general with either --ds9 or --aladin together. This option is specially for FITS viwer showing only a single frame. Therefore, this option is appropriate for tools like JSky.
		--spec : PyVI will use a spectrum viewer (e.g. SPLAT-VO, VOSpec). You must check the viewer first whether it is available with the SAMP.
		--image_dir, --text_dir, --spec_dir : the directory names are optional
		if the directory names are not given, the current working directory is a default directory.