Possible transforming: 
my @a = 'a' .. 'g';
my $py_range = <>; # '[x:y]'
my $perl_range = $py_range =~ s{\[:}{[0:}r =~ s{:\]}{:0]}r =~ s/:\K-?\
+d+/$&-1/er =~ s/-\d+/$&+@a/ger =~ s/:/../r;
print eval '@a' . $perl_range;

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In reply to Re: Converting python list range expressions to perl by rsFalse
in thread Converting python list range expressions to perl by ibm1620

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