code: def dpkg_source(b_or_x,arg1,cwd=None):
      "call dpkg-source -b|x arg1 [arg2]"
      assert b_or_x in ['-b','-x']
      args = ['/usr/bin/dpkg-source',b_or_x,arg1]
      process_command(args, cwd=cwdf dpkg_source(b_or_x,arg1,cwd=None):
      "call dpkg-source -b|x arg1 [arg2]"
      assert b_or_x in ['-b','-x']
      args = ['/usr/bin/dpkg-source',b_or_x,arg1]
      process_command(args, cwd=cwd)
docs: call dpkg-source -b|x arg1 [arg2]