That’s what’s called a list comprehension in Python.
http://docs.python.org/tutorial/datastructures.html#list-comprehensions
It’s equivalent to this:
quoted = []
for c in comps:
quoted.append('{%s}' % c)
The expression `'{%s}' % c` is taking one of the list items (a string) and
formatting it into a new string, replacing the `%s` token.
It is roughly equivalent to: `'{' + c + '}'`
-Nathan
From: Mohamed Selim
Sent: Tuesday, September 04, 2012 5:20 AM
To: [email protected]
Subject: [Nuke-python] Re: Listing the EXR compression type in a dropdownmenu
panel
NathanR wrote:
The nuke.Panel class is basically a thin wrapper for the old-school TCL
panels. As such, if you quote your list items in TCL syntax (using braces),
things will work as you expect:
# Verbose code for demonstration
w = nuke.nodes.Write(file_type='exr')
comps = w['compression'].values()
quoted = ['{%s}' % c for c in comps]
p = nuke.Panel('Compression')
p.addEnumerationPulldown('compression', ' '.join(quoted))
p.show()
-Nathan
Works great!
Can you explain to me what this line means? ['{%s}' % c for c in comps]
--------------------------------------------------------------------------------
Mohamed Selim
Nuke Compositor
Cairo, Egypt
www.mselim.com
--------------------------------------------------------------------------------
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