old_contents: import pytest
  import numpy.testing as npt
  
  
  def assert_warns_msg(expected_warning, func, msg, *args, **kwargs):
      """Assert a call leads to a warning with a specific message
  
      Test whether a function call leads to a warning of type `expected_warning`
      with a message that contains the string `msg`.
  
      Parameters
      ----------
      expected_warning : warning class
          The class of warning to be checked; e.g., DeprecationWarning
      func : object
          The class, method, property, or function to be called as\
          func(*args, **kwargs)
      msg : str
          The message or a substring of the message to test for.
      *args : positional arguments to `func`
      **kwargs: keyword arguments to `func`
  
      """
      with pytest.warns(expected_warning) as record:
          func(*args, **kwargs)
      npt.assert_equal(len(record), 1)
      print(msg, record[0].message.args[0])
      if msg is not None:
          npt.assert_equal(msg in record[0].message.args[0], True)
  
new_contents: import pytest
  import numpy.testing as npt
  
  
  def assert_warns_msg(expected_warning, func, msg, *args, **kwargs):
      """Assert a call leads to a warning with a specific message
  
      Test whether a function call leads to a warning of type `expected_warning`
      with a message that contains the string `msg`.
  
      Parameters
      ----------
      expected_warning : warning class
          The class of warning to be checked; e.g., DeprecationWarning
      func : object
          The class, method, property, or function to be called as\
          func(*args, **kwargs)
      msg : str
          The message or a substring of the message to test for.
      *args : positional arguments to `func`
      **kwargs: keyword arguments to `func`
  
      """
      with pytest.warns(expected_warning) as record:
          func(*args, **kwargs)
      npt.assert_equal(len(record), 1)
      if msg is not None:
          npt.assert_equal(msg in record[0].message.args[0], True)
  
subject: remove print in assert_warns_msg