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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_channels(note):
 """Find the channel names within a string. The channel names are stored in the .ent file. We can read the file with _read_ent and we can parse most of the notes (comments) with _read_notes however the note containing the montage cannot be read because it's too complex. So, instead of parsing it, we just pass the string of the note around. This function takes the string and finds where the channel definition is. Parameters note : str string read from .ent file, it's the note which contains montage. Returns ------- chan_name : list of str the names of the channels. """

    id_ch = note.index('ChanNames')
    chan_beg = note.index('(', id_ch)
    chan_end = note.index(')', chan_beg)
    note_with_chan = note[chan_beg + 1:chan_end]
    return [x.strip('" ') for x in note_with_chan.split(',')]