Display Function Code Body?
Hail Python pals! I played with the R (http://r-project.cran.org) last
night to do some statistics and it has an interactive session too, and
I found a feature that is quite useful.
I found by actually typing a function name, the R gives you a code body
output.
> f1 = function(x){x*x}
> f1
function(x){x*x}
# more examples (you can try some)
> sd
function (x, na.rm = FALSE)
{
if (is.matrix(x))
apply(x, 2, sd, na.rm = na.rm)
else if (is.vector(x))
sqrt(var(x, na.rm = na.rm))
else if (is.data.frame(x))
sapply(x, sd, na.rm = na.rm)
else sqrt(var(as.vector(x), na.rm = na.rm))
}
#
While our python gives an output which is more pro but less
informational.
>>> def f1(x):return x*x
>>> f1
What I would like to do is to write a function like disp(), when typed,
it can give you the code infomation.
>>> disp(f1)
def f1(x):
return x*x
# or any shallow function code from a file
>>> import calendar; disp(calendar.isleap)
def isleap(year):
"""Return 1 for leap years, 0 for non-leap years."""
return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)
# surely the compiled function code cannot be displayed
>>> disp(blabla)
: internal/compiled function
Can someone please point out how this can be achieved nicely. I've
tried some text searching approach, too dirty I must say.
Oh! Thank you ...
Haibao Tang
--
http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] 20050126 find replace strings in file
OK. But please don't die throwing that string, or this post will lose its educational purpose as it was meant to be. -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] combinatorics fun
I am no longer resisting. As time goes, the nausea when I first saw Mr. Lee's smelly "technical posts" is starting to fade. The discussion group should have a high tolerance towards polymorphic people these days. -- http://mail.python.org/mailman/listinfo/python-list
Re: Performance Issues of MySQL with Python
There are no performance overhead except when you are dragging a huge
chunk of information out of the database, in that case, python is
converting the data to its tuple data type which adds one more
processing.
I found this when I didn't have the priviledge to do "mysql> SELECT *
FROM TBL INTO OUTFILE;", I used python MySQLdb first, which I later
found sufficiently slower enough than using >>>system("echo 'USE db;
SELECT * FROM TBL;' |mysql >outfile")
But this is the minor case.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Complementary language?
At home I almost use python exclusively, the other two languages I can be productive is C# and C++, I chose C# because I am a Windows programmer (don't throw tomato at me, I am no troll..) and I choose C++ because the algorithm was implemented in this dialect in school. -- http://mail.python.org/mailman/listinfo/python-list
Jython & IronPython Under Active Development?
This question may be a bit weird but I really want to know if these two hybrid projects are still active. -- http://mail.python.org/mailman/listinfo/python-list
A simple question string.replace
I have a two-column data file like this 1.12.3 2.211.1 4.31.1 ... Is it possible to substitue all '1.1' to some value else without using re. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
How to parse a name out of a web page?
with high accuracy... My temporary plan is to first recognized consecutive two or three initial-capitalized words, but certainly we need to do more than that? Anyone has suggestions? Thanks first. -- http://mail.python.org/mailman/listinfo/python-list
