English ordinals are converted to datetime

[fmeyer]

When dealing with regular english ordinal numbers, the library converts then to datetime.
ex:

list(strconv.convert_series(["20th", "street", "2015-01-01"]))

becomes:
[datetime.datetime(2017, 7, 20, 0, 0), 'street', datetime.datetime(2015, 1, 1, 0, 0)]

This is caused because duparse takes the ordinal as a literal date when the previous types aren't satisfied. Since unregistering the datetime converter affects the other fields on the series, the only solution I found is to define a new ordinal type.

So the question to discuss is if the default fallback value should be datetime because the same issue happens when the string contains a ratio like 2/3

[bruth]

Good observation. Since dateutil (duparse) will try to infer what it can, so there are likely a bunch of other edge cases that could be hit. This may need to be a parameter as to whether date parsing through be fuzzy or strict (i.e. one of the predefined date formats).

[bruth]

@fmeyer Have anymore thoughts on this?