[Numpy-discussion] "can cast safely" table

Pierre Haessig pierre.haessig@crans....
Thu Jun 21 07:50:12 CDT 2012


Hi,

While getting through the ufunc documentation,
(http://docs.scipy.org/numpy/docs/numpy-docs/reference/ufuncs.rst/)
I took the liberty to change one line in the code segment which
generates the "can cast safely" table. I wanted to increase the
readability if the table by increasing its contrast. To this end, I
replaced the character '0' by '-'. (I copy pasted the result below). Now
two questions :

1) One thing is that some of you may not like this change and I'm fine
with that because this was just for fun !
2) A slightly more important thing is to double check that the table
content is unchanged. Indeed, the table caption says it was generated on
a 32 bits machine while my computer is running a 64 bits Linux. I
believe that the table I generated was the same, but please make sure I
didn't mess up something.

Best,
Pierre

Quick preview of the change :

the "can cast safely" table before :

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

the "can cast safely" table after :

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 - 1 1 1 1 1 1 - - - - - - 1 1 1 1 1 1 1 1 1 1 1 - -
h - - 1 1 1 1 1 - - - - - - - 1 1 1 1 1 1 1 1 1 1 - -
i - - - 1 1 1 1 - - - - - - - - 1 1 - 1 1 1 1 1 1 - -
l - - - - 1 1 1 - - - - - - - - 1 1 - 1 1 1 1 1 1 - -
q - - - - 1 1 1 - - - - - - - - 1 1 - 1 1 1 1 1 1 - -
p - - - - 1 1 1 - - - - - - - - 1 1 - 1 1 1 1 1 1 - -
B - - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 - -
H - - - 1 1 1 1 - 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - -
I - - - - 1 1 1 - - 1 1 1 1 - - 1 1 - 1 1 1 1 1 1 - -
L - - - - - - - - - - 1 1 1 - - 1 1 - 1 1 1 1 1 1 - -
Q - - - - - - - - - - 1 1 1 - - 1 1 - 1 1 1 1 1 1 - -
P - - - - - - - - - - 1 1 1 - - 1 1 - 1 1 1 1 1 1 - -
e - - - - - - - - - - - - - 1 1 1 1 1 1 1 1 1 1 1 - -
f - - - - - - - - - - - - - - 1 1 1 1 1 1 1 1 1 1 - -
d - - - - - - - - - - - - - - - 1 1 - 1 1 1 1 1 1 - -
g - - - - - - - - - - - - - - - - 1 - - 1 1 1 1 1 - -
F - - - - - - - - - - - - - - - - - 1 1 1 1 1 1 1 - -
D - - - - - - - - - - - - - - - - - - 1 1 1 1 1 1 - -
G - - - - - - - - - - - - - - - - - - - 1 1 1 1 1 - -
S - - - - - - - - - - - - - - - - - - - - 1 1 1 1 - -
U - - - - - - - - - - - - - - - - - - - - - 1 1 1 - -
V - - - - - - - - - - - - - - - - - - - - - - 1 1 - -
O - - - - - - - - - - - - - - - - - - - - - - 1 1 - -
M - - - - - - - - - - - - - - - - - - - - - - - - 1 -
m - - - - - - - - - - - - - - - - - - - - - - - - - 1



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