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Resolve "uproot4 integration"

Merged Resolve "uproot4 integration"
58-uproot4-integration-2 into master
Merged Tamas Gal requested to merge 58-uproot4-integration-2 into master
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km3io/offline.py
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import binascii
from collections import namedtuple
import uproot3
import logging
import warnings
import numba as nb
import uproot
import numpy as np
import awkward as ak
from .definitions import mc_header, fitparameters, reconstruction
from .definitions import mc_header
from .tools import cached_property, to_num, unfold_indices
from .rootio import Branch, BranchMapper
MAIN_TREE_NAME = "E"
EXCLUDE_KEYS = ["AAObject", "t", "fBits", "fUniqueID"]
# 110 MB based on the size of the largest basket found so far in km3net
BASKET_CACHE_SIZE = 110 * 1024 ** 2
BASKET_CACHE = uproot3.cache.ThreadSafeArrayCache(BASKET_CACHE_SIZE)
def _nested_mapper(key):
"""Maps a key in the ROOT file to another key (e.g. trks.pos.x -> pos_x)"""
return "_".join(key.split(".")[1:])
EVENTS_MAP = BranchMapper(
name="events",
key="Evt",
extra={"t_sec": "t.fSec", "t_ns": "t.fNanoSec"},
exclude=EXCLUDE_KEYS,
update={
"n_hits": "hits",
"n_mc_hits": "mc_hits",
"n_tracks": "trks",
"n_mc_tracks": "mc_trks",
},
)
SUBBRANCH_MAPS = [
BranchMapper(
name="tracks",
key="trks",
extra={},
exclude=EXCLUDE_KEYS
+ ["trks.usr_data", "trks.usr", "trks.fUniqueID", "trks.fBits"],
attrparser=_nested_mapper,
flat=False,
toawkward=["fitinf", "rec_stages"],
),
BranchMapper(
name="mc_tracks",
key="mc_trks",
exclude=EXCLUDE_KEYS
+ [
"mc_trks.rec_stages",
"mc_trks.fitinf",
"mc_trks.fUniqueID",
"mc_trks.fBits",
],
attrparser=_nested_mapper,
toawkward=["usr", "usr_names"],
flat=False,
),
BranchMapper(
name="hits",
key="hits",
exclude=EXCLUDE_KEYS
+ [
"hits.usr",
"hits.pmt_id",
"hits.origin",
"hits.a",
"hits.pure_a",
"hits.fUniqueID",
"hits.fBits",
],
attrparser=_nested_mapper,
flat=False,
),
BranchMapper(
name="mc_hits",
key="mc_hits",
exclude=EXCLUDE_KEYS
+ [
"mc_hits.usr",
"mc_hits.dom_id",
"mc_hits.channel_id",
"mc_hits.tdc",
"mc_hits.tot",
"mc_hits.trig",
"mc_hits.fUniqueID",
"mc_hits.fBits",
],
attrparser=_nested_mapper,
flat=False,
),
]
class OfflineBranch(Branch):
@cached_property
def usr(self):
return Usr(self._mapper, self._branch, index_chain=self._index_chain)
class Usr:
"""Helper class to access AAObject `usr` stuff (only for events.usr)"""
log = logging.getLogger("offline")
def __init__(self, mapper, branch, index_chain=None):
self._mapper = mapper
self._name = mapper.name
self._index_chain = [] if index_chain is None else index_chain
self._branch = branch
self._usr_names = []
self._usr_idx_lookup = {}
self._usr_key = "usr" if mapper.flat else mapper.key + ".usr"
self._initialise()
def _initialise(self):
try:
self._branch[self._usr_key]
# This will raise a KeyError in old aanet files
# which has a different strucuter and key (usr_data)
# We do not support those (yet)
except (KeyError, IndexError):
print(
"The `usr` fields could not be parsed for the '{}' branch.".format(
self._name
)
)
return
self._usr_names = [
n.decode("utf-8")
for n in self._branch[self._usr_key + "_names"].lazyarray()[0]
]
self._usr_idx_lookup = {
name: index for index, name in enumerate(self._usr_names)
}
class OfflineReader:
"""reader for offline ROOT files"""
data = self._branch[self._usr_key].lazyarray()
event_path = "E/Evt"
item_name = "OfflineEvent"
skip_keys = ["t", "AAObject"]
aliases = {
"t_sec": "t.fSec",
"t_ns": "t.fNanoSec",
"usr": "AAObject/usr",
"usr_names": "AAObject/usr_names",
}
special_branches = {
"hits": {
"id": "hits.id",
"channel_id": "hits.channel_id",
"dom_id": "hits.dom_id",
"t": "hits.t",
"tot": "hits.tot",
"trig": "hits.trig", # non-zero if the hit is a triggered hit
},
"mc_hits": {
"id": "mc_hits.id",
"pmt_id": "mc_hits.pmt_id",
"t": "mc_hits.t", # hit time (MC truth)
"a": "mc_hits.a", # hit amplitude (in p.e.)
"origin": "mc_hits.origin", # track id of the track that created this hit
"pure_t": "mc_hits.pure_t", # photon time before pmt simultion
"pure_a": "mc_hits.pure_a", # amplitude before pmt simution,
"type": "mc_hits.type", # particle type or parametrisation used for hit
},
"trks": {
"id": "trks.id",
"pos_x": "trks.pos.x",
"pos_y": "trks.pos.y",
"pos_z": "trks.pos.z",
"dir_x": "trks.dir.x",
"dir_y": "trks.dir.y",
"dir_z": "trks.dir.z",
"t": "trks.t",
"E": "trks.E",
"len": "trks.len",
"lik": "trks.lik",
"rec_type": "trks.rec_type",
"rec_stages": "trks.rec_stages",
"fitinf": "trks.fitinf",
},
"mc_trks": {
"id": "mc_trks.id",
"pos_x": "mc_trks.pos.x",
"pos_y": "mc_trks.pos.y",
"pos_z": "mc_trks.pos.z",
"dir_x": "mc_trks.dir.x",
"dir_y": "mc_trks.dir.y",
"dir_z": "mc_trks.dir.z",
# "status": "mc_trks.status", # TODO: check this
# "mother_id": "mc_trks.mother_id", # TODO: check this
"type": "mc_trks.type",
"hit_ids": "mc_trks.hit_ids",
"usr": "mc_trks.usr", # TODO: trouble with uproot4
"usr_names": "mc_trks.usr_names", # TODO: trouble with uproot4
},
}
special_aliases = {
"tracks": "trks",
"mc_tracks": "mc_trks",
}
def __init__(self, f, index_chain=None, step_size=2000, keys=None, aliases=None, event_ctor=None):
"""OfflineReader class is an offline ROOT file wrapper
if self._index_chain:
data = unfold_indices(data, self._index_chain)
Parameters
----------
f: str or uproot4.reading.ReadOnlyDirectory (from uproot4.open)
Path to the file of interest or uproot4 filedescriptor.
step_size: int, optional
Number of events to read into the cache when iterating.
Choosing higher numbers may improve the speed but also increases
the memory overhead.
index_chain: list, optional
Keeps track of index chaining.
keys: list or set, optional
Branch keys.
aliases: dict, optional
Branch key aliases.
event_ctor: class or namedtuple, optional
Event constructor.
self._usr_data = data
"""
if isinstance(f, str):
self._fobj = uproot.open(f)
self._filepath = f
elif isinstance(f, uproot.reading.ReadOnlyDirectory):
self._fobj = f
self._filepath = f._file.file_path
else:
raise TypeError("Unsupported file descriptor.")
self._step_size = step_size
self._uuid = self._fobj._file.uuid
self._iterator_index = 0
self._keys = keys
self._event_ctor = event_ctor
self._index_chain = [] if index_chain is None else index_chain
for name in self._usr_names:
setattr(self, name, self[name])
# if aliases is not None:
# self.aliases = aliases
# else:
# # Check for usr-awesomeness backward compatibility crap
# if "E/Evt/AAObject/usr" in self._fobj:
# print("Found usr data")
# if ak.count(f["E/Evt/AAObject/usr"].array()) > 0:
# self.aliases.update(
# {
# "usr": "AAObject/usr",
# "usr_names": "AAObject/usr_names",
# }
# )
if self._keys is None:
self._initialise_keys()
if self._event_ctor is None:
self._event_ctor = namedtuple(
self.item_name,
set(
list(self.keys())
+ list(self.aliases)
+ list(self.special_branches)
+ list(self.special_aliases)
),
)
def __getitem__(self, item):
if self._index_chain:
return unfold_indices(self._usr_data, self._index_chain)[
:, self._usr_idx_lookup[item]
]
else:
return self._usr_data[:, self._usr_idx_lookup[item]]
def _initialise_keys(self):
skip_keys = set(self.skip_keys)
toplevel_keys = set(k.split("/")[0] for k in self._fobj[self.event_path].keys())
keys = (toplevel_keys - skip_keys).union(
list(self.aliases.keys()) + list(self.special_aliases)
)
for key in list(self.special_branches) + list(self.special_aliases):
keys.add("n_" + key)
# self._grouped_branches = {k for k in toplevel_keys - skip_keys if isinstance(self._fobj[self.event_path][k].interpretation, uproot.AsGrouped)}
self._keys = keys
def keys(self):
return self._usr_names
"""Returns all accessible branch keys, without the skipped ones."""
return self._keys
def __str__(self):
entries = []
for name in self.keys():
entries.append("{}: {}".format(name, self[name]))
return "\n".join(entries)
@property
def events(self):
# TODO: deprecate this, since `self` is already the container type
return iter(self)
def _keyfor(self, key):
"""Return the correct key for a given alias/key"""
return self.special_aliases.get(key, key)
def __getattr__(self, attr):
attr = self._keyfor(attr)
# if attr in self.keys() or (attr.startswith("n_") and self._keyfor(attr.split("n_")[1]) in self._grouped_branches):
if attr in self.keys():
return self.__getitem__(attr)
raise AttributeError(
f"'{self.__class__.__name__}' object has no attribute '{attr}'"
)
def __repr__(self):
return "<{}[{}]>".format(self.__class__.__name__, self._name)
def __getitem__(self, key):
# indexing
if isinstance(key, (slice, int, np.int32, np.int64)):
if not isinstance(key, slice):
key = int(key)
return self.__class__(
self._fobj,
index_chain=self._index_chain + [key],
step_size=self._step_size,
aliases=self.aliases,
keys=self.keys(),
event_ctor=self._event_ctor
)
if isinstance(key, str) and key.startswith("n_"): # group counts, for e.g. n_events, n_hits etc.
key = self._keyfor(key.split("n_")[1])
arr = self._fobj[self.event_path][key].array(uproot.AsDtype(">i4"))
return unfold_indices(arr, self._index_chain)
key = self._keyfor(key)
branch = self._fobj[self.event_path]
# These are special branches which are nested, like hits/trks/mc_trks
# We are explicitly grabbing just a predefined set of subbranches
# and also alias them to be backwards compatible (and attribute-accessible)
if key in self.special_branches:
fields = []
# some fields are not always available, like `usr_names`
for to_field, from_field in self.special_branches[key].items():
if from_field in branch[key].keys():
fields.append(to_field)
log.debug(fields)
out = branch[key].arrays(
fields, aliases=self.special_branches[key]
)
else:
out = branch[self.aliases.get(key, key)].array()
class OfflineReader:
"""reader for offline ROOT files"""
return unfold_indices(out, self._index_chain)
def __init__(self, file_path=None):
"""OfflineReader class is an offline ROOT file wrapper
def __iter__(self):
self._iterator_index = 0
self._events = self._event_generator()
return self
Parameters
----------
file_path : path-like object
Path to the file of interest. It can be a str or any python
path-like object that points to the file.
def _event_generator(self):
events = self._fobj[self.event_path]
group_count_keys = set(k for k in self.keys() if k.startswith("n_")) # special keys to make it easy to count subbranch lengths
log.debug("group_count_keys: %s", group_count_keys)
keys = set(
list(
set(self.keys())
- set(self.special_branches.keys())
- set(self.special_aliases)
- group_count_keys
)
+ list(self.aliases.keys())
) # all top-level keys for regular branches
log.debug("keys: %s", keys)
log.debug("aliases: %s", self.aliases)
events_it = events.iterate(
keys, aliases=self.aliases, step_size=self._step_size
)
specials = []
special_keys = (
self.special_branches.keys()
) # dict-key ordering is an implementation detail
log.debug("special_keys: %s", special_keys)
for key in special_keys:
# print(f"adding {key} with keys {self.special_branches[key].keys()} and aliases {self.special_branches[key]}")
specials.append(
events[key].iterate(
self.special_branches[key].keys(),
aliases=self.special_branches[key],
step_size=self._step_size,
)
)
group_counts = {}
for key in group_count_keys:
group_counts[key] = iter(self[key])
log.debug("group_counts: %s", group_counts)
for event_set, *special_sets in zip(events_it, *specials):
for _event, *special_items in zip(event_set, *special_sets):
data = {}
for k in keys:
data[k] = _event[k]
for (k, i) in zip(special_keys, special_items):
data[k] = i
for tokey, fromkey in self.special_aliases.items():
data[tokey] = data[fromkey]
for key in group_counts:
data[key] = next(group_counts[key])
yield self._event_ctor(**data)
def __next__(self):
return next(self._events)
def __len__(self):
if not self._index_chain:
return self._fobj[self.event_path].num_entries
elif isinstance(self._index_chain[-1], (int, np.int32, np.int64)):
if len(self._index_chain) == 1:
return 1
# try:
# return len(self[:])
# except IndexError:
# return 1
return 1
else:
# ignore the usual index magic and access `id` directly
return len(self._fobj[self.event_path]["id"].array(), self._index_chain)
"""
self._fobj = uproot3.open(file_path)
self._filename = file_path
self._tree = self._fobj[MAIN_TREE_NAME]
self._uuid = binascii.hexlify(self._fobj._context.uuid).decode("ascii")
def __actual_len__(self):
"""The raw number of events without any indexing/slicing magic"""
return len(self._fobj[self.event_path]["id"].array())
def __repr__(self):
length = len(self)
actual_length = self.__actual_len__()
return f"{self.__class__.__name__} ({length}{'/' + str(actual_length) if length < actual_length else ''} events)"
@property
def uuid(self):
@@ -200,21 +312,11 @@ class OfflineReader:
def __exit__(self, *args):
self.close()
@cached_property
def events(self):
"""The `E` branch, containing all offline events."""
return OfflineBranch(
self._tree, mapper=EVENTS_MAP, subbranchmaps=SUBBRANCH_MAPS
)
@cached_property
def header(self):
"""The file header"""
if "Head" in self._fobj:
header = {}
for n, x in self._fobj["Head"]._map_3c_string_2c_string_3e_.items():
header[n.decode("utf-8")] = x.decode("utf-8").strip()
return Header(header)
return Header(self._fobj["Head"].tojson()["map<string,string>"])
else:
warnings.warn("Your file header has an unsupported format")