two version of R2R are here HEAD master

1 files changed, 147 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/isodate/isoduration.py b/.venv/lib/python3.12/site-packages/isodate/isoduration.py
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+"""
+This module provides an ISO 8601:2004 duration parser.
+
+It also provides a wrapper to strftime. This wrapper makes it easier to
+format timedelta or Duration instances as ISO conforming strings.
+"""
+
+import re
+from datetime import timedelta
+from decimal import Decimal
+
+from isodate.duration import Duration
+from isodate.isodatetime import parse_datetime
+from isodate.isoerror import ISO8601Error
+from isodate.isostrf import D_DEFAULT, strftime
+
+ISO8601_PERIOD_REGEX = re.compile(
+    r"^(?P<sign>[+-])?"
+    r"P(?!\b)"
+    r"(?P<years>[0-9]+([,.][0-9]+)?Y)?"
+    r"(?P<months>[0-9]+([,.][0-9]+)?M)?"
+    r"(?P<weeks>[0-9]+([,.][0-9]+)?W)?"
+    r"(?P<days>[0-9]+([,.][0-9]+)?D)?"
+    r"((?P<separator>T)(?P<hours>[0-9]+([,.][0-9]+)?H)?"
+    r"(?P<minutes>[0-9]+([,.][0-9]+)?M)?"
+    r"(?P<seconds>[0-9]+([,.][0-9]+)?S)?)?$"
+)
+# regular expression to parse ISO duration strings.
+
+
+def parse_duration(datestring, as_timedelta_if_possible=True):
+    """
+    Parses an ISO 8601 durations into datetime.timedelta or Duration objects.
+
+    If the ISO date string does not contain years or months, a timedelta
+    instance is returned, else a Duration instance is returned.
+
+    The following duration formats are supported:
+      -PnnW                  duration in weeks
+      -PnnYnnMnnDTnnHnnMnnS  complete duration specification
+      -PYYYYMMDDThhmmss      basic alternative complete date format
+      -PYYYY-MM-DDThh:mm:ss  extended alternative complete date format
+      -PYYYYDDDThhmmss       basic alternative ordinal date format
+      -PYYYY-DDDThh:mm:ss    extended alternative ordinal date format
+
+    The '-' is optional.
+
+    Limitations:  ISO standard defines some restrictions about where to use
+      fractional numbers and which component and format combinations are
+      allowed. This parser implementation ignores all those restrictions and
+      returns something when it is able to find all necessary components.
+      In detail:
+        it does not check, whether only the last component has fractions.
+        it allows weeks specified with all other combinations
+
+      The alternative format does not support durations with years, months or
+      days set to 0.
+    """
+    if not isinstance(datestring, str):
+        raise TypeError("Expecting a string %r" % datestring)
+    match = ISO8601_PERIOD_REGEX.match(datestring)
+    if not match:
+        # try alternative format:
+        if datestring.startswith("P"):
+            durdt = parse_datetime(datestring[1:])
+            if as_timedelta_if_possible and durdt.year == 0 and durdt.month == 0:
+                # FIXME: currently not possible in alternative format
+                # create timedelta
+                ret = timedelta(
+                    days=durdt.day,
+                    seconds=durdt.second,
+                    microseconds=durdt.microsecond,
+                    minutes=durdt.minute,
+                    hours=durdt.hour,
+                )
+            else:
+                # create Duration
+                ret = Duration(
+                    days=durdt.day,
+                    seconds=durdt.second,
+                    microseconds=durdt.microsecond,
+                    minutes=durdt.minute,
+                    hours=durdt.hour,
+                    months=durdt.month,
+                    years=durdt.year,
+                )
+            return ret
+        raise ISO8601Error("Unable to parse duration string %r" % datestring)
+    groups = match.groupdict()
+    for key, val in groups.items():
+        if key not in ("separator", "sign"):
+            if val is None:
+                groups[key] = "0n"
+            # print groups[key]
+            if key in ("years", "months"):
+                groups[key] = Decimal(groups[key][:-1].replace(",", "."))
+            else:
+                # these values are passed into a timedelta object,
+                # which works with floats.
+                groups[key] = float(groups[key][:-1].replace(",", "."))
+    if as_timedelta_if_possible and groups["years"] == 0 and groups["months"] == 0:
+        ret = timedelta(
+            days=groups["days"],
+            hours=groups["hours"],
+            minutes=groups["minutes"],
+            seconds=groups["seconds"],
+            weeks=groups["weeks"],
+        )
+        if groups["sign"] == "-":
+            ret = timedelta(0) - ret
+    else:
+        ret = Duration(
+            years=groups["years"],
+            months=groups["months"],
+            days=groups["days"],
+            hours=groups["hours"],
+            minutes=groups["minutes"],
+            seconds=groups["seconds"],
+            weeks=groups["weeks"],
+        )
+        if groups["sign"] == "-":
+            ret = Duration(0) - ret
+    return ret
+
+
+def duration_isoformat(tduration, format=D_DEFAULT):
+    """
+    Format duration strings.
+
+    This method is just a wrapper around isodate.isostrf.strftime and uses
+    P%P (D_DEFAULT) as default format.
+    """
+    # TODO: implement better decision for negative Durations.
+    #       should be done in Duration class in consistent way with timedelta.
+    if (
+        isinstance(tduration, Duration)
+        and (
+            tduration.years < 0
+            or tduration.months < 0
+            or tduration.tdelta < timedelta(0)
+        )
+    ) or (isinstance(tduration, timedelta) and (tduration < timedelta(0))):
+        ret = "-"
+    else:
+        ret = ""
+    ret += strftime(tduration, format)
+    return ret