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How can I obtain the element-wise logical NOT of a pandas Series?
...8]:
0 False
1 False
2 True
3 False
dtype: bool
Using Python2.7, NumPy 1.8.0, Pandas 0.13.1:
In [119]: s = pd.Series([True, True, False, True]*10000)
In [10]: %timeit np.invert(s)
10000 loops, best of 3: 91.8 µs per loop
In [11]: %timeit ~s
10000 loops, best of 3: 73.5 µs per lo...
How to pretty-print a numpy.array without scientific notation and with given precision?
...mpy/reference/generated/numpy.set_printoptions.html
http://docs.python.org/2.7/library/stdtypes.html#string-formatting
'''
# http://stackoverflow.com/questions/2891790/pretty-printing-of-numpy-array
#...............................................................................
from __future__ i...
Specifying and saving a figure with exact size in pixels
...efig('figure.png', dpi=1)
I am using the last PIP versions of the Python 2.7 libraries in Linux Mint 13.
Hope that helps!
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multiprocessing: sharing a large read-only object between processes?
...if code run in a child process tries to access a global variable... in the 2.7 docs refers to Python running under Windows.
– user1071847
Oct 23 '17 at 18:42
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What blocks Ruby, Python to get Javascript V8 speed? [closed]
...d. But these exist in Python most commonly in the PyPy project - a CPython 2.7 (and soon to be 3.0+) compatible JIT. And there are loads of evented server libraries like Tornado for example. Real world tests exist between PyPy running Tornado vs Node.js and the performance differences are slight.
...
PHP shell_exec() vs exec()
...elen:1000 \n RX bytes:13151177627 (13.1 GB) TX bytes:2779457335 (2.7 GB)\n"...
> exec('ifconfig')
string(0) ""
Note that use of the backtick operator is identical to shell_exec().
Update: I really should explain that last one. Looking at this answer years later even I don't know why ...
Accessing dict keys like an attribute?
... inherited and another one in __dict__
Causes a memory leak in Python < 2.7.4 / Python3 < 3.2.3
Pylint goes bananas with E1123(unexpected-keyword-arg) and E1103(maybe-no-member)
For the uninitiated it seems like pure magic.
A short explanation on how this works
All python objects internally ...
Is python's sorted() function guaranteed to be stable?
...hen by salary grade).
This part of the documentation was added to Python 2.7 and Python 3.4(+) so any compliant implementation of that language version should have a stable sorted.
Note that for CPython the list.sort has been stable since Python 2.3
Tim Peters rewrote his list.sort() imple...
Difference between method and function in Scala
...
Scala will expand that, assuming m type is (List[Int])AnyRef into (Scala 2.7):
val f = new AnyRef with Function1[List[Int], AnyRef] {
def apply(x$1: List[Int]) = this.m(x$1)
}
On Scala 2.8, it actually uses an AbstractFunction1 class to reduce class sizes.
Notice that one can't convert the o...
Is 0 a decimal literal or an octal literal?
... word "token" is defined syntactically by the C (N1570 6.4) and C++ (C++11 2.7 [lex.token]) standards. 0x does not qualify. (At least in C, it is a preprocessing number (N1570 6.4.8) if it's not part of a hexadecimal constant, but that's not a token.)
– Keith Thompson
...