8000 chararray.rstrip inconsistency (Trac #1200) · Issue #1798 · numpy/numpy · GitHub
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thouis opened this issue Oct 19, 2012 · 2 comments
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chararray.rstrip inconsistency (Trac #1200) #1798

thouis opened this issue Oct 19, 2012 · 2 comments
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00 - Bug component: numpy._core

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@thouis
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thouis commented Oct 19, 2012

Original ticket http://projects.scipy.org/numpy/ticket/1200 on 2009-08-19 by trac user dgoldsmith, assigned to unknown.

c = np.array([' aA '], dtype='S6').view(np.chararray); c
chararray([' aA'],
dtype='|S6')
len(c[0]) # is 'A' the trailing character...
4
c.rstrip('A') # ...or not?
chararray([' aA'],
dtype='|S6')

Note:

len(c.base[0]); c.base[0]
6
' aA '

Consequent hypothesis: rstrip is operating on c.base, not c.

len(c.base[0]); c.base[0]
6
' aA '
@thouis
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thouis commented Oct 19, 2012

@mdboom wrote on 2009-10-12

This inconsistency is the unfortunate cost of backward compatibility with numarray.

As of SVN r1714, there is a refactoring of the chararray functionality, and the vectorized string operations are available as free functions, negating the need for the chararray class. This should be the way forward for new code.

This bug should probably be marked as "won't fix"

@thouis
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thouis commented Oct 19, 2012

@charris wrote on 2010-04-24

I'm going to follow mdroe's recommendation and close this ticket as "won't fix".

@thouis thouis closed this as completed Oct 19, 2012
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