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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 _update_conda_devel():
 """Update to the latest development conda package. """

    conda_bin = _get_conda_bin()
    channels = _get_conda_channels(conda_bin)
    assert conda_bin, "Could not find anaconda distribution for upgrading bcbio"
    subprocess.check_call([conda_bin, "install", "--quiet", "--yes"] + channels +
                           ["bcbio-nextgen>=%s" % version.__version__.replace("a0", "a")])
    return os.path.dirname(os.path.dirname(conda_bin))