diff options
Diffstat (limited to 'lib/stwcs/updatewcs/utils.py')
| -rw-r--r-- | lib/stwcs/updatewcs/utils.py | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/lib/stwcs/updatewcs/utils.py b/lib/stwcs/updatewcs/utils.py index 0e7d77b..460ddb3 100644 --- a/lib/stwcs/updatewcs/utils.py +++ b/lib/stwcs/updatewcs/utils.py @@ -4,19 +4,19 @@ import os from stsci.tools import fileutil def diff_angles(a,b): - """ + """ Perform angle subtraction a-b taking into account - small-angle differences across 360degree line. + small-angle differences across 360degree line. """ - + diff = a - b - + if diff > 180.0: diff -= 360.0 if diff < -180.0: diff += 360.0 - + return diff def getBinning(fobj, extver=1): @@ -34,13 +34,13 @@ def extract_rootname(kwvalue,suffix=""): If a non-valid value (any of ['','N/A','NONE','INDEF',None]) is input, simply return a string value of 'NONE' - + This function will also replace any 'suffix' specified with a blank. """ # check to see whether a valid kwvalue has been provided as input if kwvalue.strip() in ['','N/A','NONE','INDEF',None]: return 'NONE' # no valid value, so return 'NONE' - + # for a valid kwvalue, parse out the rootname # strip off any environment variable from input filename, if any are given if '$' in kwvalue: @@ -58,11 +58,11 @@ def extract_rootname(kwvalue,suffix=""): return rootname.strip() def construct_distname(fobj,wcsobj): - """ - This function constructs the value for the keyword 'DISTNAME'. + """ + This function constructs the value for the keyword 'DISTNAME'. It relies on the reference files specified by the keywords 'IDCTAB', - 'NPOLFILE', and 'D2IMFILE'. - + 'NPOLFILE', and 'D2IMFILE'. + The final constructed value will be of the form: <idctab rootname>-<npolfile rootname>-<d2imfile rootname> and have a value of 'NONE' if no reference files are specified. @@ -71,22 +71,22 @@ def construct_distname(fobj,wcsobj): suffix='_idc') if idcname is None and wcsobj.sip is not None: idcname = 'UNKNOWN' - + npolname = build_npolname(fobj) if npolname is None and wcsobj.cpdis1 is not None: npolname = 'UNKNOWN' - + d2imname = build_d2imname(fobj) if d2imname is None and wcsobj.det2im is not None: d2imname = 'UNKNOWN' - + sipname = build_sipname(fobj) distname = build_distname(sipname,npolname,d2imname) return {'DISTNAME':distname,'SIPNAME':sipname} def build_distname(sipname,npolname,d2imname): - """ + """ Core function to build DISTNAME keyword value without the HSTWCS input. """ @@ -137,4 +137,4 @@ def build_d2imname(fobj): d2imfile = 'UNKNOWN' else: d2imfile = 'NOMODEL' - return d2imfile
\ No newline at end of file + return d2imfile |