[Pytables-users] Problem creating tables with PyTables 1.1

[Tim C. <tc...@op...>]

The following code used to work with PyTables 0.9 but now fails with 
PyTables 1.1, and I don't understand why. Can anyone provide some clues?

Tim C

#####################################
import time
import sys
import numarray
import numarray.random_array as ra
from numarray import memmap
from tables import *

nor=100000
#bnor=nor*100
bnor=nor*300

filters = None

# Create a Table
starttime = time.time()
fileh = openFile("array1.h5", mode = "w")
# Get the root group
root = fileh.root
# define table class
class TestTable(IsDescription):
    mycol = FloatCol(pos=1)
# create table
mytable = fileh.createTable(root, 'testtable', TestTable,
                            "Very Big Test table", filters=filters)
rowsinbuf = mytable._v_expectedrows
# load table with data
for i in xrange(0, nor, rowsinbuf):
    mytable.append([numarray.arange(i, i+rowsinbuf, type="Float64")])
fileh.flush()
print "Creating a %s element table and saving in PyTables took %.3f 
seconds" % (nor, time.time() - starttime)
print
fileh.close()
########################################

When run, it gives:

Traceback (most recent call last):
  File "test2.py", line 28, in ?
    mytable.append([numarray.arange(i, i+rowsinbuf, type="Float64")])
  File "/usr/local/lib/python2.4/site-packages/tables/Table.py", line 
1252, in append
    raise ValueError, \
ValueError: rows parameter cannot be converted into a recarray object 
compliant with table '/testtable (Table(0,)) 'Very Big Test table''. The 
error was: <The row structure doesn't match that provided by the format 
specification>