Pulled the code which deals with input into a separate module. Changes to the HSTWCS module are related to using it with headerlets, as well as with observations from other telescopes.

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@11958 fe389314-cf27-0410-b35b-8c050e845b92

1 files changed, 59 insertions, 0 deletions

diff --git a/wcsutil/getinput.py b/wcsutil/getinput.py
new file mode 100644
index 0000000..22ed492
--- /dev/null
+++ b/wcsutil/getinput.py
@@ -0,0 +1,59 @@
+import pyfits
+from pytools import irafglob, fileutil, parseinput
+
+def parseSingleInput(f=None, ext=None):
+    if isinstance(f, str):
+        # create an HSTWCS object from a filename
+        if ext != None:
+            filename = f
+            if isinstance(ext,tuple):
+                if ext[0] == '':
+                    extnum = ext[1] # handle ext=('',1)
+                else:
+                    extnum = ext
+            else:
+                extnum = int(ext)
+        elif ext == None:
+            filename, ext = fileutil.parseFilename(f)
+            ext = fileutil.parseExtn(ext)
+            if ext[0] == '':
+                extnum = int(ext[1]) #handle ext=('',extnum)
+            else:
+                extnum = ext
+        phdu = pyfits.open(filename)
+        hdr0 = pyfits.getheader(filename)
+        try:
+            ehdr = pyfits.getheader(filename, ext=extnum)
+        except (IndexError,KeyError):
+            print 'Unable to get extension.', extnum
+            raise
+
+    elif isinstance(f, pyfits.HDUList):
+        phdu = f
+        if ext == None:
+            extnum = 0
+        else:
+            extnum = ext
+        ehdr = f[extnum].header
+        hdr0 = f[0].header
+        filename = hdr0.get('FILENAME', "")
+
+    return filename, hdr0, ehdr, phdu
+
+
+def parseMultipleInput(input):
+    if isinstance(input, str):
+        if input[0] == '@':
+            # input is an @ file
+            filelist = irafglob.irafglob(input)
+        else:
+            try:
+                filelist, output = parseinput.parseinput(input)
+            except IOError: raise
+    elif isinstance(input, list):
+        if isinstance(input[0], wcsutil.HSTWCS):
+            # a list of HSTWCS objects
+            return input
+        else:
+            filelist = input[:]
+    return filelist
\ No newline at end of file