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GetType() can lie?
...dFoo foo = new BadFoo();
Console.WriteLine("n1 and n2 are the same type: {0}",
Object.ReferenceEquals(n1.GetType(), foo.GetType()));
// output:
// n1 and n2 are the same type: True
so, yikes, you've successfully lied, right?
Well, yes and no... Consider that using this as an e...
How to check if there exists a process with a given pid in Python?
...
Sending signal 0 to a pid will raise an OSError exception if the pid is not running, and do nothing otherwise.
import os
def check_pid(pid):
""" Check For the existence of a unix pid. """
try:
os.kill(pid, 0)
e...
Python `if x is not None` or `if not x is None`?
...
1029
There's no performance difference, as they compile to the same bytecode:
Python 2.6.2 (r262:7...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
...
2130
Real, User and Sys process time statistics
One of these things is not like the other. Real ref...
Autoreload of modules in IPython [duplicate]
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edited Aug 21 '19 at 15:20
rfho_bdss
13111 silver badge1515 bronze badges
answered May 6 '12 at 17:37
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Why were pandas merges in python faster than data.table merges in R in 2012?
...
120
It looks like Wes may have discovered a known issue in data.table when the number of unique stri...
How can one see content of stack with GDB?
...
70
Use:
bt - backtrace: show stack functions and args
info frame - show stack start/end/args/loca...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
... and I want to add two new columns to a dataframe df with n columns (n > 0).
These new columns result from the application of a function to one of the columns in the dataframe.
...
How do I profile memory usage in Python?
...ex Count % Size % Cumulative % Kind (class / dict of class)
0 25773 53 1612820 49 1612820 49 str
1 11699 24 483960 15 2096780 64 tuple
2 174 0 241584 7 2338364 72 dict of module
3 3478 7 222592 7 2560956 78 types.CodeType
4 3...
Margin while printing html page
...iour, the user must select 'Print preview' and then set the print size to 100% (default is Shrink To Fit).
A better option for full control on printed margins is to use the @page directive to set the paper margin, which will affect the margin on paper outside the html body element, which is normal...