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指定したディレクトリでpdfをテキストに変換したい

これは私が試したコードです

import os
import subprocess

def pdftotext(pdf):
    # insert your code here
    basename, _ = os.path.splitext(os.path.basename(pdf))
    subprocess.call(['pdftotext', '-enc', 'UTF-8',
                 pdf, os.path.join('c:\pdf\pydf\data', basename + '.txt')])

pdftotext("C:\\pdf\\pydf\\pdfs\\ipm.pdf")
with open(os.path.join('c:\\pdf\\pydf\\data', 'ipm.txt')) as infile:
   print(infile.read(1000))

しかし、それはエラーになります

Traceback (most recent call last):
File "C:/pdf/browser.py", line 10, in <module>
pdftotext("C:\\pdf\\pydf\\pdfs\\ipm.pdf")
File "C:/pdf/browser.py", line 8, in pdftotext
pdf, os.path.join('c:\pdf\pydf\data', basename + '.txt'), '-'])
File "C:\Python34\lib\subprocess.py", line 537, in call
with Popen(*popenargs, **kwargs) as p:
File "C:\Python34\lib\subprocess.py", line 859, in __init__
restore_signals, start_new_session)
File "C:\Python34\lib\subprocess.py", line 1112, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

私のコードで何が問題になっていますか?

4

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