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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def before_scenario(context, scenario):
 """Prepare a fresh environment for each scenario."""


    # Prepare a new temporary directory.
    context.directory = testfixtures.TempDirectory(create=True)
    context.old_cwd = os.getcwd()
    context.new_cwd = context.directory.path

    # Move into our new working directory.
    os.chdir(context.new_cwd)