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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 resolve_frompath(pkgpath, relpath, level=0):
 """Resolves the path of the module referred to by 'from ..x import y'."""

    if level == 0:
        return relpath
    parts = pkgpath.split('.') + ['_']
    parts = parts[:-level] + (relpath.split('.') if relpath else [])
    return '.'.join(parts)