[Pytables-users] setting default table entries

[Jeff W. <Jef...@no...>]

Consider this script:

from tables import *
class Particle(IsDescription):
     name        = StringCol(16, pos=1)   # 16-character String
     lati        = IntCol(pos=2)        # integer
     longi       = IntCol(pos=3)        # integer
     pressure    = Float32Col(dflt=-999.9,pos=4)    # float 
(single-precision)
     temperature = FloatCol(pos=5)      # double (double-precision)
# Open a file in "w"rite mode
fileh = openFile("table1.h5", mode = "w")
# Create a new group
group = fileh.createGroup(fileh.root, "newgroup")
# Create a new table in newgroup group
table = fileh.createTable(group, 'table', Particle, "A table", Filters(1))
table.flush()
fileh.close()


I would expect that the default value for 'pressure' would be set to 
-999.9.  However, ptdump -v shows

/ (Group) ''
   children := ['newgroup' (Group)]
/newgroup (Group) ''
   children := ['table' (Table)]
/newgroup/table (Table(0L,), shuffle, zlib(1)) 'A table'
   description := {
     "name": Col(dtype='CharType', shape=(16,), dflt=None, pos=0, 
indexed=0),
     "lati": Col(dtype='Int32', shape=1, dflt=None, pos=1, indexed=0),
     "longi": Col(dtype='Int32', shape=1, dflt=None, pos=2, indexed=0),
     "pressure": Col(dtype='Float32', shape=1, dflt=None, pos=3, indexed=0),
     "temperature": Col(dtype='Float64', shape=1, dflt=None, pos=4, 
indexed=0) }
   byteorder := big


Why does it say dflt=None?

-Jeff
-- 
Jeffrey S. Whitaker         Phone  : (303)497-6313
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