#! python3
"""Combine PDFs

Combines all the PDFs in the current working directory into a single PDF.

Note:
    * Example PDFs can be downloaded from http://nostarch.com/automatestuff/
    * Book uses PyPDF2; I'm an overachiever that uses PyPDF4

"""


def main():
    import PyPDF4, os

    # Get all the PDF filenames.
    if os.path.exists("allminutes.pdf"):
        os.remove("allminutes.pdf")
    pdfFiles = []
    for filename in os.listdir('.'):
        if filename.endswith(".pdf"):
            pdfFiles.append(filename)
    pdfFiles.sort(key=str.lower)

    pdfWriter = PyPDF4.PdfFileWriter()

    # Loop through all the PDF files.
    for filename in pdfFiles:
        pdfFileObj = open(filename, "rb")
        pdfReader = PyPDF4.PdfFileReader(pdfFileObj)
        if pdfReader.isEncrypted and filename == "encrypted.pdf":
            pdfReader.decrypt("rosebud")
        if pdfReader.isEncrypted and filename == "encryptedminutes.pdf":
            pdfReader.decrypt("swordfish")
        # Loop through all the pages (except the first) and add them.
        for pageNum in range(1, pdfReader.numPages):
            pageObj = pdfReader.getPage(pageNum)
            pdfWriter.addPage(pageObj)

    # Save the resulting PDF to a file.
    pdfOutput = open("allminutes.pdf", "wb")
    pdfWriter.write(pdfOutput)
    pdfOutput.close()


if __name__ == '__main__':
    main()

#! python3
"""Combine PDFs

Combines all the PDFs in the current working directory into a single PDF.

Note:
    * Example PDFs can be downloaded from http://nostarch.com/automatestuff/
    * Book uses :py:mod:`PyPDF2`; I'm an overachiever that uses PyPDF4

"""


def main():
    import PyPDF4, os

    # Get all the PDF filenames.
    if os.path.exists("allminutes.pdf"):
        os.remove("allminutes.pdf")
    pdfFiles = []
    for filename in os.listdir('.'):
        if filename.endswith(".pdf"):
            pdfFiles.append(filename)
    pdfFiles.sort(key=str.lower)

    pdfWriter = PyPDF4.PdfFileWriter()

    # Loop through all the PDF files.
    for filename in pdfFiles:
        pdfFileObj = open(filename, "rb")
        pdfReader = PyPDF4.PdfFileReader(pdfFileObj)
        if pdfReader.isEncrypted and filename == "encrypted.pdf":
            pdfReader.decrypt("rosebud")
        if pdfReader.isEncrypted and filename == "encryptedminutes.pdf":
            pdfReader.decrypt("swordfish")
        # Loop through all the pages (except the first) and add them.
        for pageNum in range(1, pdfReader.numPages):
            pageObj = pdfReader.getPage(pageNum)
            pdfWriter.addPage(pageObj)

    # Save the resulting PDF to a file.
    pdfOutput = open("allminutes.pdf", "wb")
    pdfWriter.write(pdfOutput)
    pdfOutput.close()


if __name__ == '__main__':
    main()

Update P2_combinePDF.py added module reference in docstring
Update P2_combinePDF.py
added module reference in docstring
