中綴じ冊子のページ割り当てを表示する関数。

script.py

def nakatoji(
    n_papers=3,
    right_binding=True,
    include_hyoshi=False,
    include_urabyoshi=False,
    include_hyoshiura=False,
    include_urabyoshiura=False,
):
    """
    中綴じ冊子のページ割り当てを表示する関数。

    Parameters:
        n_papers (int): 用紙（1枚で4ページ分）の数。
        right_binding (bool): 右綴じ（True）か左綴じ（False）か。
        include_hyoshi (bool): 表紙を含めるか。
        include_urabyoshi (bool): 裏表紙を含めるか。
        include_hyoshiura (bool): 表紙裏を含めるか。
        include_urabyoshiura (bool): 裏表紙裏を含めるか。
    """
    n_pages = n_papers * 4
    offset = sum([include_hyoshi, include_hyoshiura])
    pages = [i_page + 1 - offset for i_page in range(n_pages)]
    pages[0] = 'HY_' if include_hyoshi else pages[0]
    pages[1] = 'HYU' if include_hyoshiura else pages[1]
    pages[-2] = 'UBU' if include_urabyoshiura else pages[-2]
    pages[-1] = 'UB_' if include_urabyoshi else pages[-1]

    cursor_0 = 0
    cursor_1 = n_papers * 4 - 1
    i_first = 0 if right_binding else 1
    for i_paper in range(n_papers):
        print(f'--- paper {(i_paper + 1):03} ---')
        for _ in range(2):  # omote, ura
            i_pages_here = [0, 0]
            i_pages_here[i_first] = cursor_0
            i_pages_here[1 - i_first] = cursor_1
            print(f' [ {pages[i_pages_here[0]]:03} | {pages[i_pages_here[1]]:03} ]')
            cursor_0 += 1
            cursor_1 -= 1
            i_first = 1 - i_first


print('===== 3ページ 右綴じ =====')
nakatoji(n_papers=3, right_binding=True)
print('\n===== 3ページ 左綴じ =====')
nakatoji(n_papers=3, right_binding=False)
print('\n===== 3ページ 右綴じ =====')
nakatoji(n_papers=3, right_binding=True, include_hyoshi=True, include_urabyoshi=True)
print('\n===== 3ページ 右綴じ =====')
nakatoji(
    n_papers=3, right_binding=True,
    include_hyoshi=True, include_urabyoshi=True,
    include_hyoshiura=True, include_urabyoshiura=True)

===== 3ページ 右綴じ =====
--- paper 001 ---
 [ 001 | 012 ]
 [ 011 | 002 ]
--- paper 002 ---
 [ 003 | 010 ]
 [ 009 | 004 ]
--- paper 003 ---
 [ 005 | 008 ]
 [ 007 | 006 ]

===== 3ページ 左綴じ =====
--- paper 001 ---
 [ 012 | 001 ]
 [ 002 | 011 ]
--- paper 002 ---
 [ 010 | 003 ]
 [ 004 | 009 ]
--- paper 003 ---
 [ 008 | 005 ]
 [ 006 | 007 ]

===== 3ページ 右綴じ =====
--- paper 001 ---
 [ HY_ | UB_ ]
 [ 010 | 001 ]
--- paper 002 ---
 [ 002 | 009 ]
 [ 008 | 003 ]
--- paper 003 ---
 [ 004 | 007 ]
 [ 006 | 005 ]

===== 3ページ 右綴じ =====
--- paper 001 ---
 [ HY_ | UB_ ]
 [ UBU | HYU ]
--- paper 002 ---
 [ 001 | 008 ]
 [ 007 | 002 ]
--- paper 003 ---
 [ 003 | 006 ]
 [ 005 | 004 ]