def call_on_recarr(func, params, recarr, param2arg=None):
"""
Call `func` with `params` over `recarr`.
The `param2arg` function, when specified, is used to get an
argument given a parameter name; otherwise, the parameter itself
is used as an argument. When the argument is a `Column` object,
the proper column from `recarr` is used as its value.
"""
args = []
for param in params:
if param2arg:
arg = param2arg(param)
else:
arg = param
if hasattr(arg, 'pathname'): # looks like a column
arg = getNestedField(recarr, arg.pathname)
# This is needed because the extension doesn't check for
# unaligned arrays anymore. The reason for doing this is that,
# for unaligned arrays, a pure copy() in Python is faster than
# the equivalent in C. I'm not completely sure why.
if not arg.flags.aligned and arg.ndim > 1:
# See the comments in `tables.numexpr.evaluate()` for the
# reasons of copying unaligned, *multidimensional* arrays.
arg = arg.copy()
args.append(arg)
return func(*args)
def call_on_recarr(func, params, recarr, param2arg=None):
"""
Call `func` with `params` over `recarr`.
The `param2arg` function, when specified, is used to get an
argument given a parameter name; otherwise, the parameter itself
is used as an argument. When the argument is a `Column` object,
the proper column from `recarr` is used as its value.
"""
args = []
for param in params:
if param2arg:
arg = param2arg(param)
else:
arg = param
if hasattr(arg, 'pathname'): # looks like a column
arg = getNestedField(recarr, arg.pathname)
args.append(arg)
return func(*args)
