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        "author": "Vadim Shmatov",
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            "License :: OSI Approved :: MIT License",
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        "description": "# PdfBuilder\n\nPdfBuilder is a Python library for low-level PDF crafting. It allows:\n- creating new PDF files from list of COS objects;\n- adding new objects and editing existing ones via incremental saves;\n- working with both old xref tables and new xref stream objects.\n\n## How to install\n\n`$ pip install pdfbuilder`\n\nPdfBuilder is written in a pure Python and doesn't have any external dependencies. It requires Python 3.5 or higher to function properly.\n\n## Example\n\nA minimalistic code sample that creates \"Hello, world\" PDF file is listed below:\n```python\nimport os, zlib\nfrom pdfbuilder import PDF, Object, ObjectReference\n\n# (0) Open new, empty file\nif os.path.isfile('test.pdf'):\n    os.remove('test.pdf')\ndoc = PDF('test.pdf')\n\n# (1) Add pages object to PDF\npages_object = Object({\n    'Type': '/Pages',\n    'Kids': [ObjectReference(5)],  # We need to know page id beforehand :(\n    'Count': 1,\n    'MediaBox': [0, 0, 595.28, 841.89]\n})\ndoc.add_new_object(pages_object)\n\n# (2) Add font to pdf\nfont_object = Object({\n    'Type': '/Font',\n    'BaseFont': '/Helvetica',\n    'Subtype': '/Type1',\n    'Encoding': '/WinAnsiEncoding'\n})\ndoc.add_new_object(font_object)\n\n# (3) Add info object to PDF\npdf_info_object = Object({\n    'ProcSet': ['/PDF', '/Text', '/ImageB', '/ImageC', '/ImageI'],\n    'Font': [Object({'F1': font_object.ref()})]\n})\ndoc.add_new_object(pdf_info_object)\n\n# (4) Add first page content to PDF\ncontent = b'2 J\\n0.57 w\\nBT /F1 14.00 Tf ET\\nBT 56.69 785.20 Td (Hello, world!) Tj ET\\n'\ncontent_compressed = zlib.compress(content)\ncontent_object = Object({\n    'Filter': '/FlateDecode',\n    'Length': len(content_compressed)\n}, stream_data=content_compressed)\ndoc.add_new_object(content_object)\n\n# (5) Add first page to PDF\npage_object = Object({\n    'Type': '/Page',\n    'Parent': pages_object.ref(),\n    'Resources': pdf_info_object.ref(),\n    'Contents': content_object.ref()\n})\ndoc.add_new_object(page_object)\n\n# (6) Add main catalog to PDF\ncatalog_object = Object({\n    'Type': '/Catalog',\n    'Pages': pages_object.ref(),\n    'OpenAction': [page_object.ref(), '/FitH', 'null'],\n    'PageLayout': '/OneColumn'\n})\ndoc.add_new_object(catalog_object)\n\n# (7) Add xref table object and save PDF\ndoc.save(root_id=6, info_id=2)\n```\nThe following example shows how to add another page to newly created document. Updates in PDF structure will be saved incrementally.\n```python\nfrom pdfbuilder import PDF, Object, ObjectReference\n\n# (0) Open already existing PDF\ndoc = PDF('test.pdf')\n\n# (1) Add new page to PDF\nsecond_page_object = Object({\n    'Type': '/Page',\n    'Parent': ObjectReference(1),\n    'Resources': ObjectReference(3),\n    'Contents': ObjectReference(4)\n})\ndoc.add_new_object(second_page_object)\n\n# (2) Update pages object\nnew_pages_object = Object({\n    'Type': '/Pages',\n    'Kids': [ObjectReference(5), second_page_object.ref()],\n    'Count': 2,\n    'MediaBox': [0, 0, 595.28, 841.89]\n}, id=1)\ndoc.update_object(new_pages_object, 1)\n\n# (3) Add new xref table object and incrementally update PDF\ndoc.save(root_id=6, info_id=2)\n```",
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