8000 DOC: Fix code that generates the table in the 'Casting Rules' section. by WarrenWeckesser · Pull Request #14558 · numpy/numpy · GitHub
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DOC: Fix code that generates the table in the 'Casting Rules' section. #14558

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Sep 20, 2019
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DOC: Fix code that generates the table in the 'Casting Rules' section. #14558

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68 changes: 35 additions & 33 deletions doc/source/reference/ufuncs.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -228,45 +228,47 @@ can generate this table for your system with the code given in the Figure.

.. admonition:: Figure

Code segment showing the "can cast safely" table for a 32-bit system.
Code segment showing the "can ca 8000 st safely" table for a 64-bit system.
Generally the output depends on the system; your system might result in
a different table.

>>> mark = {False: ' -', True: ' ✓'}
>>> def print_table(ntypes):
... print 'X',
... for char in ntypes: print char,
... print
... print('X ' + ' '.join(ntypes))
... for row in ntypes:
... print row,
... print(row, end='')
... for col in ntypes:
... print int(np.can_cast(row, col)),
... print
... print(mark[np.can_cast(row, col)], end='')
... print()
...
>>> print_table(np.typecodes['All'])
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Sorry, did this line vanish completely? I had missed that.

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Oops, fixed. I'll stop force-pushing until everything looks right.

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I honestly do not care for this small change. Lets juts get it done :).

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
? 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
? ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ - ✓
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 - - - - - - - - - - - - - - - - - - - - - - ✓ ✓ - ✓


You should note that, while included in the table for completeness,
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