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from ctypes import c_float
from .base import FormatColumn
class FloatColumn(FormatColumn):
py_types = (float, int)
class Float32Column(FloatColumn):
ch_type = 'Float32'
format = 'f'
def __init__(self, types_check=False, **kwargs):
super(Float32Column, self).__init__(types_check=types_check, **kwargs)
if types_check:
# Chop only bytes that fit current type.
# Cast to -nan or nan if overflows.
def before_write_items(items, nulls_map=None):
null_value = self.null_value
for i, item in enumerate(items):
if nulls_map and nulls_map[i]:
items[i] = null_value
else:
items[i] = c_float(item).value
self.before_write_items = before_write_items
class Float64Column(FloatColumn):
ch_type = 'Float64'
format = 'd'
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