Alf P. Steinbach wrote:
* R (Chandra) Chandrasekhar:
width = 5
height = 30
colors = ['#abcdef]', '#456789']
filename = "/tmp/image.png"
# I want to get the equivalent of variable interpolation in Perl
# so that the command
#
# convert -size 5x30 gradient:#abcdef-#456789 /tmp/image.png
#
# is derived from the variables above
Assuming that the extra right square bracket in 'colors' is a typo,
here's one way:
s = "convert -size {w}x{h} gradient:{g1}-{g2} {f}".format(
w = width, h = height, g1 = colors[0], g2 = colors[1], f = filename
)
Cheers & hth.,
- ALf
Thanks, Alf. It works if I use it so:
subprocess.call(s, shell=True)
and I think that is because s is a single string assembled in almost the
variable interpolation fashion of Perl. It does not work with the
default shell=False argument, presumably because the arguments are not
split into separate strings (something that was horrible to do by hand
using the %s and %() syntax that I had tried out previously).
I think that you and Peter have, between you, shown me two ways of using
subprocess.call(): one with shell=True and the other with shell = False.
Thanks.
Chandra
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