大约有 46,000 项符合查询结果（耗时：0.0510秒） [XML]
Creating a zero-filled pandas data frame
...
140
You can try this:
d = pd.DataFrame(0, index=np.arange(len(data)), columns=feature_list)
...
Why is early return slower than else?
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+100
This is a pure guess, and I haven't figured out an easy way to check whether it is right, but I have a theory for you.
I tried your ...
Create space at the beginning of a UITextField
...t 4.2
class TextField: UITextField {
let padding = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
override open func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.inset(by: padding)
}
override open func placeholderRect(forBounds bounds: CGRect) ->...
Adding an arbitrary line to a matplotlib plot in ipython notebook
...as np
import matplotlib.pyplot as plt
np.random.seed(5)
x = np.arange(1, 101)
y = 20 + 3 * x + np.random.normal(0, 60, 100)
plt.plot(x, y, "o")
# draw vertical line from (70,100) to (70, 250)
plt.plot([70, 70], [100, 250], 'k-', lw=2)
# draw diagonal line from (70, 90) to (90, 200)
plt.plot([70,...
How to generate keyboard events in Python?
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+50
It can be done using ctypes:
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=T...
What does it mean when an HTTP request returns status code 0?
...r any other type of HTTP network request, fail with an HTTP status code of 0?
15 Answers
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CSS background opacity with rgba not working in IE 8
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Daniel Mendel
8,35111 gold badge2020 silver badges3737 bronze badges
answered Oct 20 '10 at 7:44
MatTheCatMatTheCat
...
Use find command but exclude files in two directories
... it happy.
– peelman
Nov 12 '13 at 20:08
3
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How do Python's any and all functions work?
...or example,
>>> multiples_of_6 = (not (i % 6) for i in range(1, 10))
>>> any(multiples_of_6)
True
>>> list(multiples_of_6)
[False, False, False]
Here, (not (i % 6) for i in range(1, 10)) is a generator expression which returns True if the current number within 1 and 9 i...
Breaking out of a nested loop
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209
Well, goto, but that is ugly, and not always possible. You can also place the loops into a meth...