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* Make python code a proper module * Reorganize CMake config for shared libraries * Refactor library and dict generation in cmake config * Add basic version of python bindings for working with Frames
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@@ -61,3 +61,4 @@ spack* | |
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| # Populated by cmake before build | ||
| /include/podio/podioVersion.h | ||
| /python/podio/__init__.py | ||
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| @@ -1,137 +1,6 @@ | ||
| """Python EventStore for reading files with podio generated datamodels""" | ||
| """Legacy import wrapper for EventStore.""" | ||
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| import warnings | ||
| warnings.warn("You are using the legacy EventStore import. Switch to 'from podio import EventStore'", FutureWarning) | ||
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| from ROOT import gSystem | ||
| gSystem.Load("libpodioPythonStore") # noqa: E402 | ||
| from ROOT import podio # noqa: E402 # pylint: disable=wrong-import-position | ||
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| def size(self): | ||
| """Override size function that can be attached as __len__ method to | ||
| collections""" | ||
| return self.size() | ||
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| def getitem(self, key): | ||
| """Override getitem function that can be attached as __getitem__ method to | ||
| collections (see below why this is necessary sometimes)""" | ||
| return self.at(key) | ||
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| class EventStore: | ||
| '''Interface to events in an podio root file. | ||
| Example of use: | ||
| events = EventStore(["example.root", "example1.root"]) | ||
| for iev, store in islice(enumerate(events), 0, 2): | ||
| particles = store.get("GenParticle"); | ||
| for i, p in islice(enumerate(particles), 0, 5): | ||
| print "particle ", i, p.ID(), p.P4().Pt | ||
| ''' | ||
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| def __init__(self, filenames): | ||
| '''Create an event list from the podio root file. | ||
| Parameters: | ||
| filenames: list of root files | ||
| you can of course provide a list containing a single | ||
| root file. you could use the glob module to get all | ||
| files matching a wildcard pattern. | ||
| ''' | ||
| if isinstance(filenames, str): | ||
| filenames = (filenames,) | ||
| self.files = filenames | ||
| self.stores = [] | ||
| self.current_store = None | ||
| for fname in self.files: | ||
| store = podio.PythonEventStore(fname) | ||
| if store.isZombie(): | ||
| raise ValueError(fname + ' does not exist.') | ||
| store.name = fname | ||
| if self.current_store is None: | ||
| self.current_store = store | ||
| self.stores.append((store.getEntries(), store)) | ||
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| def __str__(self): | ||
| result = "Content:" | ||
| for item in self.current_store.getCollectionNames(): | ||
| result += f"\n\t{item}" | ||
| return result | ||
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| def get(self, name): | ||
| '''Returns a collection. | ||
| Parameters: | ||
| name: name of the collection in the podio root file. | ||
| ''' | ||
| coll = self.current_store.get(name) | ||
| # adding length function | ||
| coll.__len__ = size | ||
| # enabling the use of [] notation on the collection | ||
| # cppyy defines the __getitem__ method if the underlying c++ class has an operator[] | ||
| # method. For some reason they do not conform to the usual signature and only | ||
| # pass one argument to the function they call. Here we simply check if we have to | ||
| # define the __getitem__ for the collection. | ||
| if not hasattr(coll, '__getitem__'): | ||
| coll.__getitem__ = getitem | ||
| return coll | ||
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| def collections(self): | ||
| """Return list of all collection names.""" | ||
| return [str(c) for c in self.current_store.getCollectionNames()] | ||
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| def metadata(self): | ||
| """Get the metadata of the current event as GenericParameters""" | ||
| return self.current_store.getEventMetaData() | ||
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| def isValid(self): | ||
| """Check if the EventStore is in a valid state""" | ||
| return self.current_store is not None and self.current_store.isValid() | ||
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| # def __getattr__(self, name): | ||
| # '''missing attributes are taken from self.current_store''' | ||
| # if name != 'current_store': | ||
| # return getattr(self.current_store, name) | ||
| # else: | ||
| # return None | ||
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| def current_filename(self): | ||
| '''Returns the name of the current file.''' | ||
| if self.current_store is None: | ||
| return None | ||
| return self.current_store.fname | ||
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| def __enter__(self): | ||
| return self | ||
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| def __exit__(self, exception_type, exception_val, trace): | ||
| for store in self.stores: | ||
| store[1].close() | ||
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| def __iter__(self): | ||
| '''iterate on events in the tree. | ||
| ''' | ||
| for _, store in self.stores: | ||
| self.current_store = store | ||
| for _ in range(store.getEntries()): | ||
| yield store | ||
| store.endOfEvent() | ||
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| def __getitem__(self, evnum): | ||
| '''Get event number evnum''' | ||
| current_store = None | ||
| rel_evnum = evnum | ||
| for nev, store in self.stores: | ||
| if rel_evnum < nev: | ||
| current_store = store | ||
| break | ||
| rel_evnum -= nev | ||
| if current_store is None: | ||
| raise ValueError('event number too large: ' + str(evnum)) | ||
| self.current_store = current_store | ||
| self.current_store.goToEvent(rel_evnum) | ||
| return self | ||
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| def __len__(self): | ||
| '''Returns the total number of events in all files.''' | ||
| nevts_all_files = 0 | ||
| for nev, _ in self.stores: | ||
| nevts_all_files += nev | ||
| return nevts_all_files | ||
| from podio import EventStore # noqa: F401 # pylint: disable=wrong-import-position, unused-import |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1 @@ | ||
| __version__ = '@podio_VERSION@' |
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