def Refresh(self):
"""
Reload the spectrum from disk
"""
try:
os.path.exists(self.filename)
except OSError:
hdtv.ui.warning("File %s not found, keeping previous data" %
self.filename)
return
# call to SpecReader to get the hist
try:
hist = SpecReader.GetSpectrum(self.filename, self.fmt)
except SpecReaderError as msg:
hdtv.ui.warning(
"Failed to load spectrum: %s (file: %s), keeping previous data"
% (msg, self.filename))
return
self.hist = hist
def __init__(self, fname, fmt=None, color=hdtv.color.default, cal=None):
"""
Read a spectrum from file
"""
# check if file exists
try:
os.path.exists(fname)
except OSError:
hdtv.ui.error("File %s not found" % fname)
raise
# call to SpecReader to get the hist
try:
hist = SpecReader.GetSpectrum(fname, fmt)
except SpecReaderError as msg:
hdtv.ui.error(str(msg))
raise
self.fmt = fmt
self.filename = fname
Histogram.__init__(self, hist, color, cal)
self.typeStr = "spectrum, read from file"