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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 get_env(name, default=None):
 """Get the environment variable or return exception"""

    if name in os.environ:
        return os.environ[name]

    if default is not None:
        return default

    error_msg = "Set the {} env variable".format(name)
    raise ImproperlyConfigured(error_msg)