using a list as values to a format string without having to list each item separately

def createSVGStyleTransformationMatrix(self, transformMatrix):
    return "matrix(%f %f %f %f %f %f)"%(transformMatrix[0],transformMatrix[1],transformMatrix[2],transformMatrix[3],transformMatrix[4],transformMatrix[5])

As all the substitutions are from the same list and in sequence I was hoping there was a neater way to 开发者_开发知识库do this. Anybody got any ideas?

Alternatively, use the str.format method (version 2.6+), which is preferred over string interpolation(%) in Python 3.x:

return "matrix(%f %f %f %f %f %f)".format(*transformMatrix)

The * instructs the Python interpreter to unpack the arguments from a list or tuple.

If len(transformMatrix) == 6, then you can use

 return "matrix(%f %f %f %f %f %f)" % tuple(transformMatrix)

"matrix(%s)" % " ".join(["%f" % i for i in transformMatrix])

(not tested)

EDIT: tested :-)

"matrix({})".format(" ".join(map(str, transformMatrix)))

or I think it's simplier:

"matrix(" + " ".join(map(str, transformMatrix) + ")" 

String concatenation shouldn't be a problem with three small strings, but should avoid it using large number of or big strings.