From b2ee818b986d7e9750c53f18f5879eec8e21ef1f Mon Sep 17 00:00:00 2001 From: foamyguy Date: Wed, 15 Jan 2025 11:54:34 -0600 Subject: [PATCH 1/3] note about timestamp() float precision. --- adafruit_datetime.py | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/adafruit_datetime.py b/adafruit_datetime.py index 99e30a4..52247f3 100755 --- a/adafruit_datetime.py +++ b/adafruit_datetime.py @@ -1520,7 +1520,14 @@ def toordinal(self) -> int: return _ymd2ord(self._year, self._month, self._day) def timestamp(self) -> float: - "Return POSIX timestamp as float" + """Return POSIX timestamp as float. + + Note that Floats on most + boards are encoded in 30 bits internally, with effectively 22 + bits of precision. As a result, for modern dates this value + can be off by several minutes. As a workaround you can access + the function ``_mitime()`` to get an int version of the timestamp. + """ if not self._tzinfo is None: return (self - _EPOCH).total_seconds() s = self._mktime() From bd7f6eb75888e67a918fc2d10e9c038751b88cca Mon Sep 17 00:00:00 2001 From: foamyguy Date: Wed, 15 Jan 2025 11:57:37 -0600 Subject: [PATCH 2/3] format docstring --- adafruit_datetime.py | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/adafruit_datetime.py b/adafruit_datetime.py index 52247f3..3919d36 100755 --- a/adafruit_datetime.py +++ b/adafruit_datetime.py @@ -1522,11 +1522,11 @@ def toordinal(self) -> int: def timestamp(self) -> float: """Return POSIX timestamp as float. - Note that Floats on most - boards are encoded in 30 bits internally, with effectively 22 - bits of precision. As a result, for modern dates this value - can be off by several minutes. As a workaround you can access - the function ``_mitime()`` to get an int version of the timestamp. + Note that Floats on most boards are encoded in 30 bits + internally, with effectively 22 bits of precision. As a result, + for modern dates this value can be off by several minutes. + As a workaround you can access the function ``_mitime()`` + to get an int version of the timestamp. """ if not self._tzinfo is None: return (self - _EPOCH).total_seconds() From 285cdda11b729cb591ceb89fb1bf073470cebe35 Mon Sep 17 00:00:00 2001 From: "Limor \"Ladyada\" Fried" Date: Thu, 16 Jan 2025 11:49:32 -0500 Subject: [PATCH 3/3] Update adafruit_datetime.py Co-authored-by: Neradoc --- adafruit_datetime.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/adafruit_datetime.py b/adafruit_datetime.py index 3919d36..83dceef 100755 --- a/adafruit_datetime.py +++ b/adafruit_datetime.py @@ -1525,7 +1525,7 @@ def timestamp(self) -> float: Note that Floats on most boards are encoded in 30 bits internally, with effectively 22 bits of precision. As a result, for modern dates this value can be off by several minutes. - As a workaround you can access the function ``_mitime()`` + As a workaround you can access the function ``_mktime()`` to get an int version of the timestamp. """ if not self._tzinfo is None: pFad - Phonifier reborn

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