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import igv


    

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b = igv.Browser(
    {"reference": {
        "id": "hg19",
        "fastaURL": "files/data/hg19.snippet.fasta",
        "indexed": False,
        "cytobandURL": "files/data/cytoband.hg19.snippet.txt",
        "tracks": [
            {
                "name": "RefGene",
                "url": "files/data/refgene.hg19.snippet.bed"
            }
        ]
    }}
)


    

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b.show()


    

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def locuschange(data):
    b.locus = data
b.on("locuschange", locuschange)


    

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b.zoom_in()


    

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b.locus