21 """A helper class to create the dataset for the tutorial below."""
24 "df036_missingBranches_py_file_1.root",
25 "df036_missingBranches_py_file_2.root",
26 "df036_missingBranches_py_file_3.root"
28 treenames = [
"tree_1",
"tree_2",
"tree_3"]
32 with ROOT.TFile(self.filenames[0],
"RECREATE")
as f:
33 t =
ROOT.TTree(self.treenames[0], self.treenames[0])
39 for i
in range(1, self.nentries + 1):
46 with ROOT.TFile(self.filenames[1],
"RECREATE")
as f:
47 t =
ROOT.TTree(self.treenames[1], self.treenames[1])
51 for i
in range(1, self.nentries + 1):
57 with ROOT.TFile(self.filenames[2],
"RECREATE")
as f:
58 t =
ROOT.TTree(self.treenames[2], self.treenames[2])
62 for i
in range(1, self.nentries + 1):
69 """Enable using the class as a context manager."""
74 Enable using the class as a context manager. At the end of the context,
75 remove the files created.
77 for filename
in self.filenames:
81def df036_missingBranches(dataset: DatasetContext):
97 .DefaultValueFor(
"y", default_value)
98 .Display(columnList=(
"x",
"y"), nRows=15)
105 .FilterAvailable(
"x")
106 .Display(columnList=(
"x",
"y"), nRows=15)
112 print(
"Example 1: provide a default value for all missing branches")
114 print(
"Example 2: provide a default value for branch y, but skip events where branch x is missing")
116 print(
"Example 3: only keep events where branch y is missing and display values for branch x")
120if __name__ ==
"__main__":
122 df036_missingBranches(dataset)
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
ROOT's RDataFrame offers a modern, high-level interface for analysis of data stored in TTree ,...