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How to deal with SettingWithCopyWarning in Pandas?

I just upgraded my Pandas from 0.11 to 0.13.0rc1. Now, the application is popping out many new warnings. One of them like this: ...
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NameError: global name 'unicode' is not defined - in Python 3

... Python 3 renamed the unicode type to str, the old str type has been replaced by bytes. if isinstance(unicode_or_str, str): text = unicode_or_str decoded = False else: text = unicode_or_str.decode(encoding) decoded =...
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map function for objects (instead of arrays)

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Reorder levels of a factor without changing order of values

...f <- data.frame(f = 1:4, g = letters[1:4]) df # f g # 1 1 a # 2 2 b # 3 3 c # 4 4 d levels(df$g) # [1] "a" "b" "c" "d" df$g <- factor(df$g, levels = letters[4:1]) # levels(df$g) # [1] "d" "c" "b" "a" df # f g # 1 1 a # 2 2 b # 3 3 c # 4 4 d ...
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Modulo operator with negative values [duplicate]

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How to do multiple arguments to map function where one remains the same in python?

... One option is a list comprehension: [add(x, 2) for x in [1, 2, 3]] More options: a = [1, 2, 3] import functools map(functools.partial(add, y=2), a) import itertools map(add, a, itertools.repeat(2, len(a))) ...
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Get a random boolean in python?

... 349 Adam's answer is quite fast, but I found that random.getrandbits(1) to be quite a lot faster. ...
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How to check if variable is string with python 2 and 3 compatibility

I'm aware that I can use: isinstance(x, str) in python-3.x but I need to check if something is a string in python-2.x as well. Will isinstance(x, str) work as expected in python-2.x? Or will I need to check the version and use isinstance(x, basestr) ? ...
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How do I detect the Python version at runtime? [duplicate]

I have a Python file which might have to support Python versions < 3.x and >= 3.x. Is there a way to introspect the Python runtime to know the version which it is running (for example, 2.6 or 3.2.x )? ...
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Detect and exclude outliers in Pandas data frame

...ression would do that in one shot. df = pd.DataFrame(np.random.randn(100, 3)) from scipy import stats df[(np.abs(stats.zscore(df)) &lt; 3).all(axis=1)] description: For each column, first it computes the Z-score of each value in the column, relative to the column mean and standard deviation. ...