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Add mode keyword argument to FlatEphysReader class #34

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Merged
rossant merged 1 commit into from
Feb 16, 2022
Merged

Add mode keyword argument to FlatEphysReader class #34

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9 changes: 5 additions & 4 deletions phylib/io/traces.py
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Original file line number Diff line number Diff line change
Expand Up @@ -152,15 +152,15 @@ def _apply_op(op, arg, arr):
return f(arg) if arg is not None else f()


def _memmap_flat(path, dtype=None, n_channels=None, offset=0):
def _memmap_flat(path, dtype=None, n_channels=None, offset=0, mode='r+'):
path = Path(path)
# Find the number of samples.
assert n_channels > 0
fsize = path.stat().st_size
item_size = np.dtype(dtype).itemsize
n_samples = (fsize - offset) // (item_size * n_channels)
shape = (n_samples, n_channels)
return np.memmap(path, dtype=dtype, offset=offset, shape=shape)
return np.memmap(path, dtype=dtype, offset=offset, shape=shape, mode=mode)


#------------------------------------------------------------------------------
Expand Down Expand Up @@ -303,7 +303,8 @@ def iter_chunks(self, cache=True):


class FlatEphysReader(BaseEphysReader):
def __init__(self, paths, sample_rate=None, dtype=None, offset=0, n_channels=None, **kwargs):
def __init__(self, paths, sample_rate=None, dtype=None, offset=0, n_channels=None, mode='r+',
**kwargs):
super(FlatEphysReader, self).__init__()
if isinstance(paths, (str, Path)):
paths = [paths]
Expand All @@ -312,7 +313,7 @@ def __init__(self, paths, sample_rate=None, dtype=None, offset=0, n_channels=Non
self.name = paths[0].stem
self.dir_path = paths[0].parent
self._mmaps = [
_memmap_flat(path, dtype=dtype, n_channels=n_channels, offset=offset)
_memmap_flat(path, dtype=dtype, n_channels=n_channels, offset=offset, mode=mode)
for path in paths]

self.sample_rate = sample_rate
Expand Down