Example snakefile for module concept

blog-sm-module.py

''' Three rule ex '''

rule one:
    output:
        'out1'
    shell:
        'touch {output}'

rule two:    
    input:
        'out1'
    output:
        'some_dir/out2'
    shell:
        'touch {output}

rule three:
    input:
        out_path
    output:
        'out3'
    shell:
        'touch {output}'