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|
#!/usr/bin/env python3
import argparse
import os.path
import subprocess
try:
import pypdf
except ImportError:
pypdf = None
SIGNATURE = (
15, 0,
1, 14,
13, 2,
3, 12,
11, 4,
5, 10,
9, 6,
7, 8
)
def get_parser():
parser = argparse.ArgumentParser()
parser.add_argument(
"--pagespec",
help="Page selection. At the moment only '<start>-<end>' is supported"
)
parser.add_argument(
"file",
help="Name of the PDF file",
)
return parser
def main():
parser = get_parser()
args = parser.parse_args()
if not args.pagespec:
if not pypdf:
print("Detecting the number of pages in the pdf requires pypdf")
sys.exit(1)
reader = pypdf.PdfReader(args.file)
start = 1
end = end = len(reader.pages)
else:
pspec = args.pagespec.split('-')
try:
start = int(pspec[0])
end = int(pspec[1])
except ValueError:
parser.print_usage()
except IndexError:
parser.print_usage()
pages = [str(i) for i in range(start, end+1)]
if len(pages) % 16 != 0:
empty = 16 - len(pages) % 16
pages = pages + ["{}"] * empty
rearranged = []
while pages:
for i in SIGNATURE:
rearranged.append(pages[i])
pages = pages[16:]
base, ext = os.path.splitext(args.file)
out_fname = base + '-book' + ext
subprocess.run([
'pdfjam',
'--nup', '2x1',
"--landscape",
#'--no-tidy',
'-o', out_fname,
args.file,
','.join(rearranged)
])
if __name__ == "__main__":
main()
|
