大约有 13,906 项符合查询结果（耗时：0.0253秒） [XML]
How to print number with commas as thousands separators?
...int an integer in Python 2.6.1 with commas as thousands separators. For example, I want to show the number 1234567 as 1,234,567 . How would I go about doing this? I have seen many examples on Google, but I am looking for the simplest practical way.
...
private[this] vs private
...y default? Or should I use it only in some specific cases where I need to explicitly restrict changing field value even for objects of the same class? In other words how should I choose between
...
Explicitly calling return in a function or not
...Simon Urbanek from the R core team (I believe) for recommending a user to explicitly calling return at the end of a function (his comment was deleted though):
...
String comparison in Python: is vs. == [duplicate]
...lt-in Python objects (like
strings, lists, dicts, functions,
etc.), if x is y, then x==y is also
True.
Not always. NaN is a counterexample. But usually, identity (is) implies equality (==). The converse is not true: Two distinct objects can have the same value.
Also, is it generally c...
How do you sort a dictionary by value?
...ten have to sort a dictionary, consisting of keys & values, by value. For example, I have a hash of words and respective frequencies, that I want to order by frequency.
...
Difference between map, applymap and apply methods in Pandas
Can you tell me when to use these vectorization methods with basic examples?
10 Answers
...
Cast to int vs floor
...) = -5
(int)(-4.5) = -4
This being said, there is also a difference in execution time. On my system, I've timed that casting is at least 3 times faster than floor.
I have code that needs the floor operation of a limited range of values, including negative numbers. And it needs to be very effici...
pyplot scatter plot marker size
...it increases it by a factor of 4). To see this consider the following two examples and the output they produce.
# doubling the width of markers
x = [0,2,4,6,8,10]
y = [0]*len(x)
s = [20*4**n for n in range(len(x))]
plt.scatter(x,y,s=s)
plt.show()
gives
Notice how the size increases very quickl...
Get number of digits with JavaScript
...post suggests, I would like to know how many digits var number has. For example: If number = 15; my function should return 2 . Currently, it looks like this:
...