“未实现”使用pywin32来控制Adobe Acrobat时出现异常

Question

我已经使用pywin32在python中编写了一个脚本来将pdf文件保存为直到最近才正常工作的文本。我在Excel中使用类似的方法。代码如下：

def __pdf2Txt(self, pdf, fileformat="com.adobe.acrobat.accesstext"): 
    outputLoc = os.path.dirname(pdf) 
    outputLoc = os.path.join(outputLoc, os.path.splitext(os.path.basename(pdf))[0] + '.txt') 

    try: 
     win32com.client.gencache.EnsureModule('{E64169B3-3592-47d2-816E-602C5C13F328}', 0, 1, 1) 
     adobe = win32com.client.DispatchEx('AcroExch.App') 
     pdDoc = win32com.client.DispatchEx('AcroExch.PDDoc') 
     pdDoc.Open(pdf) 
     jObject = pdDoc.GetJSObject() 
     jObject.SaveAs(outputLoc, "com.adobe.acrobat.accesstext") 
    except: 
     traceback.print_exc() 
     return False 
    finally: 
     del jObject 
     pdDoc.Close() 
     del pdDoc 
     adobe.Exit() 
     del adobe 

但是这个代码突然停止工作，我得到下面的输出：

Traceback (most recent call last): 
    File "C:\Documents and Settings\ablishen\workspace\HooverKeyCreator\src\HooverKeyCreator.py", line 38, in __pdf2Txt 
    jObject.SaveAs(outputLoc, "com.adobe.acrobat.accesstext") 
    File "C:\Python27\lib\site-packages\win32com\client\dynamic.py", line 505, in __getattr__ 
    ret = self._oleobj_.Invoke(retEntry.dispid,0,invoke_type,1) 
com_error: (-2147467263, 'Not implemented', None, None) 
False 

我已经用VB写的类似代码正常工作，所以我猜它与COM接口没有正确绑定到适当的功能有关？ （我的COM知识是不完整的）。

Answer 1

Blish，this thread持有的关键解决方案，您正在寻找：https://mail.python.org/pipermail/python-win32/2002-March/000260.html

我承认，上面的帖子是不是最容易找到（可能因为Google根据内容的年龄将它评分为低）。

具体来说，将建议的this piece将获得运行你的东西：https://mail.python.org/pipermail/python-win32/2002-March/000265.html

仅供参考，代码的完整片，不需要你手动补丁dynamic.py（段应运行非常出来的盒）：

# gets all files under ROOT_INPUT_PATH with FILE_EXTENSION and tries to extract text from them into ROOT_OUTPUT_PATH with same filename as the input file but with INPUT_FILE_EXTENSION replaced by OUTPUT_FILE_EXTENSION 
from win32com.client import Dispatch 
from win32com.client.dynamic import ERRORS_BAD_CONTEXT 

import winerror 

# try importing scandir and if found, use it as it's a few magnitudes of an order faster than stock os.walk 
try: 
    from scandir import walk 
except ImportError: 
    from os import walk 

import fnmatch 

import sys 
import os 

ROOT_INPUT_PATH = None 
ROOT_OUTPUT_PATH = None 
INPUT_FILE_EXTENSION = "*.pdf" 
OUTPUT_FILE_EXTENSION = ".txt" 

def acrobat_extract_text(f_path, f_path_out, f_basename, f_ext): 
    avDoc = Dispatch("AcroExch.AVDoc") # Connect to Adobe Acrobat 

    # Open the input file (as a pdf) 
    ret = avDoc.Open(f_path, f_path) 
    assert(ret) # FIXME: Documentation says "-1 if the file was opened successfully, 0 otherwise", but this is a bool in practise? 

    pdDoc = avDoc.GetPDDoc() 

    dst = os.path.join(f_path_out, ''.join((f_basename, f_ext))) 

    # Adobe documentation says "For that reason, you must rely on the documentation to know what functionality is available through the JSObject interface. For details, see the JavaScript for Acrobat API Reference" 
    jsObject = pdDoc.GetJSObject() 

    # Here you can save as many other types by using, for instance: "com.adobe.acrobat.xml" 
    jsObject.SaveAs(dst, "com.adobe.acrobat.accesstext") 

    pdDoc.Close() 
    avDoc.Close(True) # We want this to close Acrobat, as otherwise Acrobat is going to refuse processing any further files after a certain threshold of open files are reached (for example 50 PDFs) 
    del pdDoc 

if __name__ == "__main__": 
    assert(5 == len(sys.argv)), sys.argv # <script name>, <script_file_input_path>, <script_file_input_extension>, <script_file_output_path>, <script_file_output_extension> 

    #$ python get.txt.from.multiple.pdf.py 'C:\input' '*.pdf' 'C:\output' '.txt' 

    ROOT_INPUT_PATH = sys.argv[1] 
    INPUT_FILE_EXTENSION = sys.argv[2] 
    ROOT_OUTPUT_PATH = sys.argv[3] 
    OUTPUT_FILE_EXTENSION = sys.argv[4] 

    # tuples are of schema (path_to_file, filename) 
    matching_files = ((os.path.join(_root, filename), os.path.splitext(filename)[0]) for _root, _dirs, _files in walk(ROOT_INPUT_PATH) for filename in fnmatch.filter(_files, INPUT_FILE_EXTENSION)) 

    # patch ERRORS_BAD_CONTEXT as per https://mail.python.org/pipermail/python-win32/2002-March/000265.html 
    global ERRORS_BAD_CONTEXT 
    ERRORS_BAD_CONTEXT.append(winerror.E_NOTIMPL) 

    for filename_with_path, filename_without_extension in matching_files: 
     print "Processing '{}'".format(filename_without_extension) 
     acrobat_extract_text(filename_with_path, ROOT_OUTPUT_PATH, filename_without_extension, OUTPUT_FILE_EXTENSION) 

我已经WinPython 64 2.7.6.3测试了这个，的Acrobat X PRO

Answer 2

makepy.py是win32com python包的一个脚本。

运行它为您的安装“连线”python到Windows中的COM/OLE对象。以下是我用来与Excel交谈并在其中执行某些操作的代码的摘录。本示例获取当前工作簿中工作表1的名称。如果它有一个例外，它会自动运行makepy：

import win32com; 
import win32com.client; 
from win32com.client import selecttlb; 

def attachExcelCOM(): 
    makepyExe = r'python C:\Python25\Lib\site-packages\win32com\client\makepy.py'; 
    typeList = selecttlb.EnumTlbs(); 
    for tl in typeList: 
     if (re.match('^Microsoft.*Excel.*', tl.desc, re.IGNORECASE)): 
      makepyCmd = "%s -d \"%s\"" % (makepyExe, tl.desc); 
      os.system(makepyCmd); 
     # end if 
    # end for 
# end def 

def getSheetName(sheetNum): 
    try: 
     xl = win32com.client.Dispatch("Excel.Application"); 
     wb = xl.Workbooks.Item(sheetNum); 
    except Exception, detail: 
     print 'There was a problem attaching to Excel, refreshing connect config...'; 
     print Exception, str(detail); 
     attachExcelCOM(); 
     try: 
     xl = win32com.client.Dispatch("Excel.Application"); 
     wb = xl.Workbooks.Item(sheetNum); 
     except: 
     print 'Could not attach to Excel...'; 
     sys.exit(-1); 
     # end try/except 
    # end try/except 

    wsName = wb.Name; 
    if (wsName == 'PERSONAL.XLS'): 
     return(None); 
    # end if 
    print 'The target worksheet is:'; 
    print '  ', wsName; 
    print 'Is this correct? [Y/N]',; 
    answer = string.strip(sys.stdin.readline()); 
    answer = answer.upper(); 
    if (answer != 'Y'): 
     print 'Sheet not identified correctly.'; 
     return(None); 
    # end if 
    return((wb, wsName)); 
# end def 

# -- Main -- 
sheetInfo = getSheetName(sheetNum); 
if (sheetInfo == None): 
    print 'Sheet not found'; 
    sys.exit(-1); 
else: 
    (wb, wsName) = sheetInfo; 
# end if