Add various string conversion utilities #294
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gvanrossum
reviewed
Jun 6, 2019
| .. function:: str_to_binary(s, encoding='utf-8', errors='strict') | ||
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| Encodes s to :data:`binary_type` in python 3 only. No-op in python 2. | ||
| *encoding*, *errors* are same as :meth:`py3.str.encode` |
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For completeness, I'd mention the type of the argument (it's possible to infer it from the rest but it took me a while). And do this for all functions.
gvanrossum
approved these changes
Jun 6, 2019
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The main thing that makes me queasy about these is that |
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IIUC @jhance found a lot of situations where these would be really handy. Maybe he can quote some here? Or you two can discuss in person. :-) |
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Currently six provides
ensure_str,ensure_text, andensure_binary. Typically these are used when you have astrobject and want to convert to text or bytes, or the inverse.I'd prefer to be explicit about which conversion I'm doing. For example, using
six.ensure_binaryshould probably not be accepting text in py2 and should not be accepting binary in py3 (for most use cases). Effectively these equivalents make the code a little stricter about what types are actually expected.They should also be more performant as they avoid an
isinstancelookup on every conversion.