大约有 47,000 项符合查询结果(耗时:0.0734秒) [XML]
urllib2.HTTPError: HTTP Error 403: Forbidden
...
171
By adding a few more headers I was able to get the data:
import urllib2,cookielib
site= "htt...
Why does Math.round(0.49999999999999994) return 1?
...n Java 6 (and presumably earlier), round(x) is implemented as floor(x+0.5).1 This is a specification bug, for precisely this one pathological case.2 Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999999999994 is exactly 1 in double precision:
static void print(do...
What is :: (double colon) in Python when subscripting sequences?
...
10 Answers
10
Active
...
Why is a round-trip conversion via a string not safe for a double?
...
178
I found the bug.
.NET does the following in clr\src\vm\comnumber.cpp:
DoubleToNumber(value, ...
How to make rounded percentages add up to 100%
...
17 Answers
17
Active
...
how do I insert a column at a specific column index in pandas?
... the beginning
df.insert(loc, column, value)
df = pd.DataFrame({'B': [1, 2, 3], 'C': [4, 5, 6]})
df
Out:
B C
0 1 4
1 2 5
2 3 6
idx = 0
new_col = [7, 8, 9] # can be a list, a Series, an array or a scalar
df.insert(loc=idx, column='A', value=new_col)
df
Out:
A B C
0 7 1 ...
Why do some C# lambda expressions compile to static methods?
...
153
This is most likely because there are no closures, for example:
int age = 25;
Action<strin...
Getting LaTeX into R Plots
...
|
edited Apr 21 '19 at 19:48
Glorfindel
19k1111 gold badges6262 silver badges8585 bronze badges
...
Grid of responsive squares
...
417
You can make responsive grid of squares with verticaly and horizontaly centered content only wi...
C# DateTime to “YYYYMMDDHHMMSS” format
...
17 Answers
17
Active
...