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def rolling_window(array, window=(0,), asteps=None, wsteps=None, axes=None, toend=True):
    """Create a view of `array` which for every point gives the n-dimensional
    neighbourhood of size window. New dimensions are added at the end of
    `array` or after the corresponding original dimension.
    
    Parameters
    ----------
    array : array_like
        Array to which the rolling window is applied.
    window : int or tuple

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# This is free and unencumbered software released into the public domain.
# See UNLICENSE.

import numpy as np
import numpy.core.arrayprint as arrayprint
import contextlib

#
# cc-wiki
# http://stackoverflow.com/questions/2891790/pretty-printing-of-numpy-array

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import networkx as nx

def line_graph(G, create_using=None):
    # This code works only for multidigraphs

    if create_using is None:
        L = G.__class__()
    else:
        # Already instantiated.
        L = create_using

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(function() {
  function uncrippleFrame() {
    var body = this.contentWindow.document.getElementsByTagName('body')[0];

    this.contentWindow.onclick = null;
    body._frame = this;

    body.onmousemove = function() {
      this._frame.contentWindow.onclick = null;
      this.setAttribute('style', '-webkit-user-select: auto;');

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// Useful for students in need of block quotes for their paper, etc.

// Execute the line in your JavaScript console
new_window=window.open();new_window.document.body.innerHTML = $('iframe').contents().find('iframe').contents().find('body').get(1).innerHTML;

javascript:new_window=window.open();new_window.document.body.innerHTML = $('iframe').contents().find('iframe').contents().find('body').get(1).innerHTML;

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"""
Module implemented restricted APIs based on graph types.

"""
_graph_types = set(['graph', 'multigraph', 'digraph', 'multidigraph'])

class MockModule(object):
    """
    A mock module.