uproot.WritableFile
Defined in uproot.writing.writable on line 197.
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- class uproot.writing.writable.WritableFile(sink, cascading, initial_directory_bytes, uuid_function)
- Parameters:
- sink (uproot.sink.file.FileSink) – The physical layer for file-writing. 
- cascading (uproot.writing._cascade.CascadingFile) – The low-level file object. 
- initial_directory_bytes (int) – Number of bytes to allocate for new directories, so that TKeys can be added to them without immediately needing to rewrite the block. 
- uuid_function (zero-argument callable returning a - uuid.UUID) – Function to create the file’s UUID and/or any directory’s UUID.
 
 - Handle to a writable ROOT file, usually created by uproot.create, uproot.recreate, or uproot.update and accessed through a uproot.WritableDirectory. 
sink
- WritableFile.sink
- Returns a uproot.sink.file.FileSink, the physical layer for writing (and sometimes reading) data. 
initial_directory_bytes
- WritableFile.initial_directory_bytes
- Number of bytes to allocate for new directories, so that TKeys can be added to them without immediately needing to rewrite the block. 
uuid_function
- WritableFile.uuid_function
- The function used to create the file’s UUID and/or any directory’s UUID. 
root_directory
- WritableFile.root_directory
- The root (first) directory in the file as a uproot.WritableDirectory. 
update_streamers
- WritableFile.update_streamers(streamers)
- Overwrite the TStreamerInfo in this file with a new list of uproot.streamers.Model_TStreamerInfo or uproot.writable._cascade.RawStreamerInfo. 
close
- WritableFile.close()
- Explicitly close the file. - (Files can also be closed with the Python - withstatement, as context managers.)- After closing, objects cannot be read from or written to the file. 
closed
file_path
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.file_path
- Filesystem path of the open file, or None if using a file-like object. 
options
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.options
- The options passed to uproot.create, uproot.recreate, or uproot.update when opening this file. 
root_version
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.root_version
- Version of ROOT used to write the file as a string. - See root_version_tuple and fVersion. 
root_version_tuple
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.root_version_tuple
- Version of ROOT used to write teh file as a tuple. - See root_version and fVersion. 
is_64bit
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.is_64bit
- True if the file has 8-byte pointers in its header; False if the pointers are 4-byte. 
compression
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.compression
- Compression algorithm and level (uproot.compression.Compression or None) for new objects added to the file. - This property can be changed, which allows you to write different objects with different compression settings. - See also fCompress. 
hex_uuid
Inherited from uproot.reading.CommonFileMethods.
uuid
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.uuid
- The unique identifier (UUID) of the ROOT file expressed as a Python - uuid.UUIDobject.
fVersion
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fVersion
- Raw version information for the ROOT file; this number is used to derive root_version, root_version_tuple, and is_64bit. 
fBEGIN
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fBEGIN
- The seek point (int) for the first data record, past the TFile header. - Usually 100. 
fEND
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fEND
- The seek point (int) to the last free word at the end of the ROOT file. 
fSeekFree
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fSeekFree
- The seek point (int) to the - TFreedata, for managing empty spaces in a ROOT file (filesystem-like fragmentation).
fNbytesFree
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fNbytesFree
- The number of bytes in the - TFreedata, for managing empty spaces in a ROOT file (filesystem-like fragmentation).
nfree
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.nfree
- The number of objects in the - TFreedata, for managing empty spaces in a ROOT file (filesystem-like fragmentation).
fNbytesName
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fNbytesName
- The number of bytes in the filename ( - TNamed) that is embedded in the ROOT file.
fUnits
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fUnits
- Number of bytes in the serialization of file seek points, which can either be 4 or 8. 
fCompress
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fCompress
- Compression algorithm and level (as an integer code) for new objects added to the file. - This property can be changed, which allows you to write different objects with different compression settings. - See also compression. 
fSeekInfo
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fSeekInfo
- The seek point (int) to the - TStreamerInfodata, where TStreamerInfo records are located.
fNbytesInfo
Inherited from uproot.reading.CommonFileMethods.
- WritableFile.fNbytesInfo
- The number of bytes in the - TStreamerInfodata, where TStreamerInfo records are located.
fUUID
Inherited from uproot.reading.CommonFileMethods.