old_contents: #!/usr/bin/env python
  from nose.tools import *
  from networkx.utils import uniform_sequence,powerlaw_sequence,create_degree_sequence
  import networkx.utils
  
  def test_degree_sequences():
      seq=create_degree_sequence(10,uniform_sequence)
      assert_equal(len(seq), 10)
      seq=create_degree_sequence(10,powerlaw_sequence)
      assert_equal(len(seq), 10)
  
new_contents: #!/usr/bin/env python
  from nose.tools import *
  from networkx.utils import uniform_sequence,powerlaw_sequence,\
      create_degree_sequence,zipf_rv,zipf_sequence,random_weighted_sample,\
      weighted_choice
  import networkx.utils
  
  def test_degree_sequences():
      seq=create_degree_sequence(10,uniform_sequence)
      assert_equal(len(seq), 10)
      seq=create_degree_sequence(10,powerlaw_sequence)
      assert_equal(len(seq), 10)
  
  def test_zipf_rv():
      r = zipf_rv(2.3)
      assert_true(type(r),int)
      assert_raises(ValueError,zipf_rv,0.5)
      assert_raises(ValueError,zipf_rv,2,xmin=0)
  
  def test_zipf_sequence():
      s = zipf_sequence(10)
      assert_equal(len(s),10)
  
  def test_random_weighted_sample():
      mapping={'a':10,'b':20}
      s = random_weighted_sample(mapping,2)
      assert_equal(sorted(s),sorted(mapping.keys()))
      assert_raises(ValueError,random_weighted_sample,mapping,3)
  
  def test_random_weighted_choice():
      mapping={'a':10,'b':0}
      c = weighted_choice(mapping)
      assert_equal(c,'a')
  
subject: Test random number/choice generators.