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The current version of h5py works fine with vlen data, but older versions did not support it.

vlen data

Here is an example of how one might work with vlen data. An example of vlen data is the EvrData. During each event, the EvrData includes fifoCodes - this is a variable length list. Each element in the list has three parts, timestampHigh, timestampLow and eventCode. Let's write an example that takes the EvrData and flattens it out into a table, where each entry in the table is 0 or 1 depending on whether or not that eventCode fired.

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