diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/lib/libdatetime.tex | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/Doc/lib/libdatetime.tex b/Doc/lib/libdatetime.tex index 72f4ed9..60fa678 100644 --- a/Doc/lib/libdatetime.tex +++ b/Doc/lib/libdatetime.tex @@ -893,21 +893,14 @@ implement all of them. return CONSTANT # fixed-offset class return CONSTANT + self.dst(dt) # daylight-aware class \end{verbatim} -\end{methoddesc} -\begin{methoddesc}{tzname}{self, dt} - Return the timezone name corresponding to the \class{datetime} represented - by \var{dt}, as a string. Nothing about string names is defined by the - \module{datetime} module, and there's no requirement that it mean anything - in particular. For example, "GMT", "UTC", "-500", "-5:00", "EDT", - "US/Eastern", "America/New York" are all valid replies. Return - \code{None} if a string name isn't known. Note that this is a method - rather than a fixed string primarily because some \class{tzinfo} objects - will wish to return different names depending on the specific value - of \var{dt} passed, especially if the \class{tzinfo} class is - accounting for daylight time. + If \method{utcoffset()} does not return \code{None}, + \method{dst()} should not return \code{None} either. + + \end{methoddesc} + \begin{methoddesc}{dst}{self, dt} Return the daylight savings time (DST) adjustment, in minutes east of UTC, or \code{None} if DST information isn't known. Return \code{0} if @@ -937,6 +930,19 @@ implement all of them. but cannot detect violations; it's the programmer's responsibility to ensure it. +\begin{methoddesc}{tzname}{self, dt} + Return the timezone name corresponding to the \class{datetime} represented + by \var{dt}, as a string. Nothing about string names is defined by the + \module{datetime} module, and there's no requirement that it mean anything + in particular. For example, "GMT", "UTC", "-500", "-5:00", "EDT", + "US/Eastern", "America/New York" are all valid replies. Return + \code{None} if a string name isn't known. Note that this is a method + rather than a fixed string primarily because some \class{tzinfo} objects + will wish to return different names depending on the specific value + of \var{dt} passed, especially if the \class{tzinfo} class is + accounting for daylight time. +\end{methoddesc} + \end{methoddesc} These methods are called by a \class{datetimetz} or \class{timetz} object, @@ -1379,7 +1385,7 @@ Instance methods: \begin{verbatim} >>> from datetime import * >>> class TZ(tzinfo): -... def utcoffset(self, dt): return -399 +... def utcoffset(self, dt): return timedelta(minutes=-399) ... >>> datetimetz(2002, 12, 25, tzinfo=TZ()).isoformat(' ') '2002-12-25 00:00:00-06:39' |