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Mapping two integers to one, in a unique and deterministic way
..., here. The limitation of Cantor pairing function (relatively) is that the range of encoded results doesn't always stay within the limits of a 2N bit integer if the inputs are two N bit integers. That is, if my inputs are two 16 bit integers ranging from 0 to 2^16 -1, then there are 2^16 * (2^16 -1)...
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 20: ordinal not in rang
...
In case someone else gets confused by this, I found a strange thing: my terminal uses utf-8, and when I print my utf-8 strings it works nicely. However when I pipe my programs output to a file, it throws a UnicodeEncodeError. In fact, when output is redirected (to a file or a pipe...
Regular expression to find URLs within a string
...ace. \w may not match international symbols (depends on regex engine), the range is needed instead: a-zA-Z0-9\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF.
– Michael Antipin
Aug 29 '17 at 13:34
...
How can I improve my paw detection?
... each paw
rects = [Rectangle((0,0), 1,1, fc='none', ec='red') for i in range(4)]
[ax.add_patch(rect) for rect in rects]
title = ax.set_title('Time 0.0 ms')
# Process and display each frame
for time, frame in infile:
paw_slices = find_paws(frame)
# Hide any rect...
How to print without newline or space?
... parameterless "print" that adds the final newline:
>>> for i in range(10):
... print i,
... else:
... print
...
0 1 2 3 4 5 6 7 8 9
>>>
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How do I do a not equal in Django queryset filtering?
...tains
icontains
in
gt
gte
lt
lte
startswith
istartswith
endswith
iendswith
range
year
month
day
week_day
isnull
search
regex
iregex
I'm sure by combining these with the Q objects as Dave Vogt suggests and using filter() or exclude() as Jason Baker suggests you'll get exactly what you need for just...
Postgresql query between date ranges
...for every single row in the table (a scan) and not using index to find the range of rows that will match (a range-seek).
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How do I use itertools.groupby()?
...ion (see notebook)
Consecutive values over a threshold (see notebook)
Find ranges of numbers in a list or continuous items (see docs)
Find all related longest sequences
Take consecutive sequences that meet a condition (see related post)
Note: Several of the latter examples derive from Víctor Terr...
Print a string as hex bytes?
....hexlify(b"Hello world !!") to get hex string. b":".join(h[i:i+2] for i in range(0, len(h), 2)) to insert ':' after every two hex digits in it.
– jfs
Mar 12 '14 at 1:17
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STL：accumulate与自定义数据类型 - C/C++ - 清泛网 - 专注C/C++及内核技术
...uires(_InputIteratorConcept<_InputIterator>)
__glibcxx_requires_valid_range(__first, __last);
for ( ; __first != __last; ++__first)
__init = __binary_op(__init, *__first);
return __init;
}
第四个参数为 __binary_op ,我们需要重写这个函数对象，后面还...