kopia lustrzana https://github.com/micropython/micropython-lib
time: Add README to explain the purpose of the time extension library.
Signed-off-by: Matt Trentini <matt.trentini@gmail.com>pull/740/head
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# time
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This library _extends_ the built-in [MicroPython `time`
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module](https://docs.micropython.org/en/latest/library/time.html#module-time) to
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include
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[`time.strftime()`](https://docs.python.org/3/library/datetime.html#strftime-and-strptime-behavior).
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`strftime()` is omitted from the built-in `time` module to conserve space.
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## Installation
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Use `mip` via `mpremote`:
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```bash
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> mpremote mip install time
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```
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See [Package management](https://docs.micropython.org/en/latest/reference/packages.html) for more details on using `mip` and `mpremote`.
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## Common uses
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`strftime()` is used when using a loggging [Formatter
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Object](https://docs.python.org/3/library/logging.html#formatter-objects) that
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employs
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[`asctime`](https://docs.python.org/3/library/logging.html#formatter-objects).
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For example:
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```python
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logging.Formatter('%(asctime)s | %(name)s | %(levelname)s - %(message)s')
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```
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The expected output might look like:
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```text
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Tue Feb 17 09:42:58 2009 | MAIN | INFO - test
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```
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But if this `time` extension library isn't installed, `asctime` will always be
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`None`:
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```text
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None | MAIN | INFO - test
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```
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