pytables selection enhancements (to close GH #1966) #2261
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1. added __str__ (to do __repr__)
2. row removal in tables is much faster if rows are consecutive
3. added Term class, refactored Selection (this is backdwards compatible)
Term is a concise way of specifying conditions for queries, e.g.
Term(dict(field = 'index', op = '>', value = '20121114'))
Term('index', '20121114')
Term('index', '>', '20121114')
Term('index', ['20121114','20121114'])
Term('index', datetime(2012,11,14))
Term('index>20121114')
updated tests for same
this should close GH pandas-dev#1996
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see #2264 |
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in pandas/io/pytables.py
added str (to do repr)
row removal in tables is much faster if rows are consecutive
added Term class, refactored Selection (this is backdwards compatible)
Term is a concise way of specifying conditions for queries, e.g.
updated tests for same
this should close GH PyTables enhancements for selection #1996
also potentially a starting point to do things like this:
df['df>0']...e.g allowing simple string expressions in criteria (Term is indpendent; I could move to a separete module.... - just a thought)