使用vim更正pdf文件bookmark页码的py脚本

# vim py script
# -- coding: UTF-8 --
# 更正pdf书签的页码
# 修改当前缓冲区每一行中的页码然后写入另一个空缓冲区
import vim, re, sys;

defaultAddPageNum = 25;

if len(sys.argv) == 1:
    addPageNum = defaultAddPageNum;
else:
    addPageNum = int(sys.argv[1]);

newb = None;
for b in vim.buffers:
    if b.name == None and len(b)<2:
        newb = b;
if newb == None:
    raise UserWarning('No empty buffer');
del newb[:];

for row in vim.current.buffer:
    m = re.match('([\s\S]+\/)(\d+)([^\/]+)?\Z', row);
    if not m:
        raise UserWarning('The string('+row+') does not match the pattern');
    if not m.group(3):
        newline = m.group(1) + str(int(m.group(2))+addPageNum);
    else:
        newline = m.group(1) + str(int(m.group(2))+addPageNum) + m.group(3);
    if newb[0] == '':
        newb[0] = newline;
    else:
        newb.append(newline);