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How to sort objects by multiple keys in Python?
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72
This answer works for any kind of column in the dictionary -- the negated column need not be a n...
Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence
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12 Answers
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How to get the process ID to kill a nohup process?
...u could do something like this in the script:
nohup my_command > my.log 2>&1 &
echo $! > save_pid.txt
This will run my_command saving all output into my.log (in a script, $! represents the PID of the last process executed). The 2 is the file descriptor for standard error (stderr) a...
decorators in the python standard lib (@deprecated specifically)
... category=DeprecationWarning,
stacklevel=2)
warnings.simplefilter('default', DeprecationWarning) # reset filter
return func(*args, **kwargs)
return new_func
# Examples
@deprecated
def some_old_function(x, y):
return x + y
class SomeClass:...
Modifying a subset of rows in a pandas dataframe
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248
Use .loc for label based indexing:
df.loc[df.A==0, 'B'] = np.nan
The df.A==0 expression cre...
How to export all collections in MongoDB?
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26 Answers
26
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How can I read command line parameters from an R script?
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210
Dirk's answer here is everything you need. Here's a minimal reproducible example.
I made two ...
Maven check for updated dependencies in repository
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287
The Maven Versions plugin and its display-dependency-updates mojo are what you're looking for:...
iOS multiline label in Interface builder
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answered Jul 2 '11 at 14:27
akashivskyyakashivskyy
39k1414 gold badges101101 silver badges113113 bronze badges
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How to discover number of *logical* cores on Mac OS X?
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812
You can do this using the sysctl utility:
sysctl -n hw.ncpu
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