# -*- coding: utf-8 -*-
"""
Created on Tue Mar 15 12:49:39 2016
@author: Zahari Kassabov
"""
import collections
import inspect
import numpy as np
[docs]def bins(arr):
"""Return bins corresponding to unique values of ``arr`` sorted by value.
.. code-block:: python
bins([-3, 5, -3, -3, 0, 1,1,0])
array([0, 3, 0, 0, 1, 2, 2, 1])
"""
arr = np.atleast_1d(arr)
return np.unique(arr, return_inverse=True)[1]
[docs]def new_labels(k1label, k2lebel, k3label):
def closure(f):
f.new_labels = k1label, k2lebel, k3label
return f
return closure
[docs]def label(label):
def closure(f):
f.label = label
return f
return closure
[docs]def get_subclasses(obj, base):
"""Return the classes in ``obj`` that are subclasses of ``base``"""
predicate = lambda x: inspect.isclass(x) and issubclass(x, base)
return collections.OrderedDict(inspect.getmembers(obj, predicate))
[docs]def apply_to_all_columns(df, func):
"""Apply a function to all columns of a dataframe at the saem time.
The parameter names are the names of the column and the values are arrays
containing the each column's values."""
params = dict((col, df[col].values) for col in df.columns)
return func(**params)