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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 write_release_version(version):
 """Write the release version to ``_version.py``."""

    dirname = os.path.abspath(os.path.dirname(__file__))
    f = open(os.path.join(dirname, "_version.py"), "wt")
    f.write("__version__ = '%s'\n" % version)
    f.close()