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Vagrant error : Failed to mount folders in Linux guest
I have some issues with Vagrant shared folders, my base system is Ubuntu 13.10 desktop.
21 Answers
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pandas read_csv and filter columns with usecols
...mport StringIO
csv = r"""dummy,date,loc,x
bar,20090101,a,1
bar,20090102,a,3
bar,20090103,a,5
bar,20090101,b,1
bar,20090102,b,3
bar,20090103,b,5"""
df = pd.read_csv(StringIO(csv),
header=0,
index_col=["date", "loc"],
usecols=["date", "loc", "x"],
parse_dates=["date"...
Rename specific column(s) in pandas
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385
data.rename(columns={'gdp':'log(gdp)'}, inplace=True)
The rename show that it accepts a dict...
How do I shuffle an array in Swift?
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635
This answer details how to shuffle with a fast and uniform algorithm (Fisher-Yates) in Swift 4....
Accessing class variables from a list comprehension in the class definition
...the class definition? The following works in Python 2 but fails in Python 3:
5 Answers
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How do I parse a string with a decimal point to a double?
I want to parse a string like "3.5" to a double. However,
18 Answers
18
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Cartesian product of x and y array points into single array of 2D points
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13 Answers
13
Active
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Should all Python classes extend object?
... new-style classes.
Finally, old-style classes have disappeared in Python 3, and inheritance from object has become implicit. So, always prefer new style classes unless you need backward compat with old software.
share
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Iterating over dictionaries using 'for' loops
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13 Answers
13
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How to JSON serialize sets?
...owing that it can handle lists, dicts, and sets:
>>> data = [1,2,3, set(['knights', 'who', 'say', 'ni']), {'key':'value'}, Decimal('3.14')]
>>> j = dumps(data, cls=PythonObjectEncoder)
>>> loads(j, object_hook=as_python_object)
[1, 2, 3, set(['knights', 'say', 'who', 'n...