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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 get_indelcaller(d_or_c):
 """Retrieve string for indelcaller to use, or empty string if not specified. """

    config = d_or_c if isinstance(d_or_c, dict) and "config" in d_or_c else d_or_c
    indelcaller = config["algorithm"].get("indelcaller", "")
    if not indelcaller:
        indelcaller = ""
    if isinstance(indelcaller, (list, tuple)):
        indelcaller = indelcaller[0] if (len(indelcaller) > 0) else ""
    return indelcaller