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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 find_chan_in_region(channels, anat, region_name):
 """Find which channels are in a specific region. Parameters channels : instance of wonambi.attr.chan.Channels channels, that have locations anat : instance of wonambi.attr.anat.Freesurfer anatomical information taken from freesurfer. region_name : str the name of the region, according to FreeSurferColorLUT.txt Returns ------- chan_in_region : list of str list of the channels that are in one region. """

    if 'region' not in channels.chan[0].attr.keys():
        lg.info('Computing region for each channel.')
        channels = assign_region_to_channels(channels, anat)

    chan_in_region = []
    for one_chan in channels.chan:
        if region_name in one_chan.attr['region']:
            chan_in_region.append(one_chan.label)

    return chan_in_region