asarray(obj, itemsize=None, unicode=None, order=None)
Versus a regular NumPy array of type :None:None:`str` or :None:None:`unicode`, this class adds the following functionality:
values automatically have whitespace removed from the end when indexed
comparison operators automatically remove whitespace from the end when comparing values
vectorized string operations are provided as methods (e.g.
:None:None:`str.endswith`) and infix operators (e.g.+,*,``%``)
:None:None:`itemsize` is the number of characters per scalar in the resulting array. If :None:None:`itemsize` is None, and :None:None:`obj` is an object array or a Python list, the :None:None:`itemsize` will be automatically determined. If :None:None:`itemsize` is provided and :None:None:`obj` is of type str or unicode, then the :None:None:`obj` string will be chunked into :None:None:`itemsize` pieces.
When true, the resulting chararray
can contain Unicode characters, when false only 8-bit characters. If unicode is None and :None:None:`obj` is one of the following:
a
chararray,an ndarray of type
:None:None:`str`or 'unicode`a Python str or unicode object,
then the unicode setting of the output array will be automatically determined.
Specify the order of the array. If order is 'C' (default), then the array will be in C-contiguous order (last-index varies the fastest). If order is 'F', then the returned array will be in Fortran-contiguous order (first-index varies the fastest).
Convert the input to a chararray
, copying the data only if necessary.
The following pages refer to to this document either explicitly or contain code examples using this.
numpy.chararray
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