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Kirill Smelkov
cpython
Commits
e69747c6
Commit
e69747c6
authored
Jan 22, 2007
by
Andrew M. Kuchling
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Update version of What's New
parent
bb6a0edc
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Doc/whatsnew/whatsnew25.tex
Doc/whatsnew/whatsnew25.tex
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Doc/whatsnew/whatsnew25.tex
View file @
e69747c6
...
...
@@ -5,7 +5,7 @@
% Fix XXX comments
\title
{
What's New in Python 2.5
}
\release
{
1.0
}
\release
{
1.0
1
}
\author
{
A.M. Kuchling
}
\authoraddress
{
\email
{
amk@amk.ca
}}
...
...
@@ -409,7 +409,7 @@ is always executed, or one or more \keyword{except} blocks to catch
specific exceptions. You couldn't combine both
\keyword
{
except
}
blocks and a
\keyword
{
finally
}
block, because generating the right bytecode for the
combined version was complicated and it wasn't clear what the
semantics of the combined should be.
semantics of the combined s
tatement s
hould be.
Guido van~Rossum spent some time working with Java, which does support the
equivalent of combining
\keyword
{
except
}
blocks and a
...
...
@@ -556,13 +556,14 @@ generators:
where the generator's execution is paused.
\item
\method
{
close()
}
raises a new
\exception
{
GeneratorExit
}
exception inside the generator to terminate the iteration.
On receiving this
exception, the generator's code must either raise
\exception
{
GeneratorExit
}
or
\exception
{
StopIteration
}
; catching the
exception and doing anything else is illegal and will trigger
a
\exception
{
RuntimeError
}
.
\method
{
close()
}
will also be called by
Python's garbage collector when the generator is garbage-collected.
exception inside the generator to terminate the iteration. On
receiving this exception, the generator's code must either raise
\exception
{
GeneratorExit
}
or
\exception
{
StopIteration
}
. Catching
the
\exception
{
GeneratorExit
}
exception and returning a value is
illegal and will trigger a
\exception
{
RuntimeError
}
; if the function
raises some other exception, that exception is propagated to the
caller.
\method
{
close()
}
will also be called by Python's garbage
collector when the generator is garbage-collected.
If you need to run cleanup code when a
\exception
{
GeneratorExit
}
occurs,
I suggest using a
\code
{
try: ... finally:
}
suite instead of
...
...
@@ -1663,6 +1664,13 @@ single number as \file{pystone.py} does.
\item
The
\module
{
pyexpat
}
module now uses version 2.0 of the Expat parser.
(Contributed by Trent Mick.)
\item
The
\class
{
Queue
}
class provided by the
\module
{
Queue
}
module
gained two new methods.
\method
{
join()
}
blocks until all items in
the queue have been retrieved and all processing work on the items
have been completed. Worker threads call the other new method,
\method
{
task
_
done()
}
, to signal that processing for an item has been
completed. (Contributed by Raymond Hettinger.)
\item
The old
\module
{
regex
}
and
\module
{
regsub
}
modules, which have been
deprecated ever since Python 2.0, have finally been deleted.
Other deleted modules:
\module
{
statcache
}
,
\module
{
tzparse
}
,
...
...
@@ -2116,14 +2124,16 @@ The pysqlite module (\url{http://www.pysqlite.org}), a wrapper for the
SQLite embedded database, has been added to the standard library under
the package name
\module
{
sqlite3
}
.
SQLite is a C library that provides a SQL-language database that
stores data in disk files without requiring a separate server process.
SQLite is a C library that provides a lightweight disk-based database
that doesn't require a separate server process and allows accessing
the database using a nonstandard variant of the SQL query language.
Some applications can use SQLite for internal data storage. It's also
possible to prototype an application using SQLite and then port the
code to a larger database such as PostgreSQL or Oracle.
pysqlite was written by Gerhard H
\"
aring and provides a SQL interface
compliant with the DB-API 2.0 specification described by
\pep
{
249
}
. This means that it should be possible to write the first
version of your applications using SQLite for data storage. If
switching to a larger database such as PostgreSQL or Oracle is
later necessary, the switch should be relatively easy.
\pep
{
249
}
.
If you're compiling the Python source yourself, note that the source
tree doesn't include the SQLite code, only the wrapper module.
...
...
@@ -2150,8 +2160,8 @@ c = conn.cursor()
# Create table
c.execute('''create table stocks
(date t
imestamp, trans varchar, symbol varchar
,
qty
decimal, price decim
al)''')
(date t
ext, trans text, symbol text
,
qty
real, price re
al)''')
# Insert a row of data
c.execute("""insert into stocks
...
...
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