8000 Merge pull request #14558 from WarrenWeckesser/update-doc-code · numpy/numpy@4ff3af3 · GitHub
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Merge pull request #14558 from WarrenWeckesser/update-doc-code
DOC: Fix code that generates the table in the 'Casting Rules' section.
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‎doc/source/reference/ufuncs.rst

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@@ -228,45 +228,47 @@ can generate this table for your system with the code given in the Figure.
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.. admonition:: Figure
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Code segment showing the "can cast safely" table for a 32-bit system.
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Code segment showing the "can cast safely" table for a 64-bit system.
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Generally the output depends on the system; your system might result in
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a different table.
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>>> mark = {False: ' -', True: ' ✓'}
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>>> def print_table(ntypes):
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... print 'X',
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... for char in ntypes: print char,
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... print
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... print('X ' + ' '.join(ntypes))
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... for row in ntypes:
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... print row,
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... print(row, end='')
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... for col in ntypes:
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... print int(np.can_cast(row, col)),
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... print
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... print(mark[np.can_cast(row, col)], end='')
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... print()
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...
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>>> print_table(np.typecodes['All'])
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X ? b h i l q p B H I L Q P e f d g F D G S U V O M m
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? 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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b 0 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0
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h 0 0 1 1 1 1 1 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0
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i 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 0 0
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l 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 0 0
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q 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 0 0
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p 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 0 0
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B 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0
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H 0 0 0 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 0 0
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I 0 0 0 0 1 1 1 0 0 1 1 1 1 0 0 1 1 0 1 1 1 1 1 1 0 0
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L 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 1 1 1 1 1 1 0 0
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Q 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 1 1 1 1 1 1 0 0
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P 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 1 1 1 1 1 1 0 0
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e 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0
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f 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0
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d 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 0 0
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g 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 1 1 1 0 0
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F 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0
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D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0
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G 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0
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S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0
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U 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0
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V 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0
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O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0
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M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
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m 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
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? ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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b - ✓ ✓ ✓ ✓ ✓ ✓ - - - - - - ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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h - - ✓ ✓ ✓ ✓ ✓ - - - - - - - ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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i - - - ✓ ✓ ✓ ✓ - - - - - - - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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l - - - - ✓ ✓ ✓ - - - - - - - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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q - - - - ✓ ✓ ✓ - - - - - - - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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p - - - - ✓ ✓ ✓ - - - - - - - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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B - - ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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H - - - ✓ ✓ ✓ ✓ - ✓ ✓ ✓ ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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I - - - - ✓ ✓ ✓ - - ✓ ✓ ✓ ✓ - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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L - - - - - - - - - - ✓ ✓ ✓ - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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Q - - - - - - - - - - ✓ ✓ ✓ - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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P - - - - - - - - - - ✓ ✓ ✓ - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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e - - - - - - - - - - - - - ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - -
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f - - - - - - - - - - - - - - ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - -
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d - - - - - - - - - - - - - - - ✓ ✓ - ✓ ✓ ✓ ✓ ✓ ✓ - -
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g - - - - - - - - - - - - - - - - ✓ - - ✓ ✓ ✓ ✓ ✓ - -
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F - - - - - - - - - - - - - - - - - ✓ ✓ ✓ ✓ ✓ ✓ ✓ - -
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D - - - - - - - - - - - - - - - - - - ✓ ✓ ✓ ✓ ✓ ✓ - -
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G - - - - - - - - - - - - - - - - - - - ✓ ✓ ✓ ✓ ✓ - -
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S - - - - - - - - - - - - - - - - - - - - ✓ ✓ ✓ ✓ - -
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U - - - - - - - - - - - - - - - - - - - - - ✓ ✓ ✓ - -
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V - - - - - - - - - - - - - - - - - - - - - - ✓ ✓ - -
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O - - - - - - - - - - - - - - - - - - - - - - ✓ ✓ - -
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M - - - - - - - - - - - - - - - - - - - - - - ✓ ✓ ✓ -
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m - - - - - - - - - - - - - - - - - - - - - - ✓ ✓ - ✓
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You should note that, while included in the table for completeness,

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