Emacs: Removing Windows Line Breaks (^M)

M-X string-replace:

C-q C-m (for ^M)

Python conditional expressions

Available from 2.5.

>>> word = "banana" if 0 is 0 else "peel"
>>> word
'banana'

>>> word = "banana" if 1 is 0 else "peel"
>>> word
'peel'

Useful URL's

Python

Python programming

python list to string

So easy I always forget...

>>> l = ['1', '2', '3']
>>> ' '.join(l)
'1 2 3'

works only on lists of strings though.

>>> l = [1, 2, 3]
>>> ' '.join(l)
Traceback (most recent call last):
File "", line 1, in ?
TypeError: sequence item 0: expected string, int found

Handy foreach + grep

Today I wanted to list a bunch of python files that used a setValue command.

To get some colour in the output

--colour=always

Ignore case

-i

Show line number

-n

Put it all together

grep --colour=always -i -n setValue

And combine with the foreach.

foreach j (*)
foreach? echo $j
foreach? cat $j |grep --colour=always -i -n setValue
foreach? end

Lovely.

Python Terminology

Attribute
I use the word attribute for any name following a dot -- for example, in the expression z.real, real is an attribute of the object z.

Executing python scripts through nuke-python

Python scripts can be executed through nuke's python interpreter using the following method.

cat [py script] | nuke -t

A fudge to be sure, but it does work.