CSV's actual problem is that there's no single CSV, and you don't know what type you have (or even if you have single consistent type through the whole file) wi

CSV's actual problem is that there's no single CSV, and you don't know what type you have (or even if you have single consistent type through the whole file) without trying to parse the whole file and seeing what breaks. Is there quoting? Is that quoting used consistently? Do you have five-digit ZIP codes, or have the East Coast ones been truncated to four digits because they began with zero? Spin the wheel!