当我尝试使用 Python 的 multiprocessing 库以及 pytesseract 和 pdf2image 时，我收到以下错误消息，但我不太明白确定这意味着什么或如何纠正它。我见过的其他帖子有类似的输出消息，涉及将 self 作为类方法中的参数传递，但我没有在此实例中创建类。
C:\Users\erik7>python "C:\Users\erik7\Documents\Python Projects\multiprocess_test2.py"
0
Exception in thread Thread-11:
Traceback (most recent call last):
File "C:\Users\erik7\AppData\Local\Programs\Python\Python38-32\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Users\erik7\AppData\Local\Programs\Python\Python38-32\lib\threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\erik7\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\pool.py", line 576, in _handle_results
task = get()
File "C:\Users\erik7\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\connection.py", line 251, in recv
return _ForkingPickler.loads(buf.getbuffer())
TypeError: __init__() takes 1 positional argument but 2 were given
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我的代码:
import pytesseract
import pdf2image
import multiprocessing
def extract(img, page_num):
print(page_num)
return pytesseract.image_to_osd(img, output_type = pytesseract.Output.DICT)['orientaton']
if __name__ == "__main__":
pdf_path = r"C:/Users/erik7/Documents/Late Scans for Testing/scans_template2.pdf"
output_fmt = 'jpeg'
img_dpi = 300
pop_path = r"C:\Users\erik7\Downloads\poppler-0.90.1\bin"
output_path = r"C:\Users\erik7\Downloads"
pytesseract.pytesseract.tesseract_cmd = r"C:\Program Files\Tesseract-OCR\tesseract.exe"
converted_path = r"C:\Users\erik7\Downloads\converted_images"
converted = pdf2image.convert_from_path(pdf_path = pdf_path, fmt = output_fmt, dpi = img_dpi, poppler_path = pop_path, output_folder = converted_path, grayscale = True, thread_count = 2)
results = []
iterable = [[img, page_num] for page_num, img in enumerate(converted)]
p = multiprocessing.Pool()
r = p.starmap(extract, iterable)
results.append(r)
p.close()
print("\n**PROCESS COMPLETED SUCCESSFULLY")
最佳答案
成功了。我需要将 pytesseract.pytesseract.tesseract_cmd = r"C:\Program Files\Tesseract-OCR\tesseract.exe"移动到我的 extract 函数和程序中能够使用多处理成功运行:
import pytesseract
import pdf2image
import multiprocessing
def extract(img, page_num):
print(page_num)
return pytesseract.image_to_osd(img, output_type = pytesseract.Output.DICT)['orientaton']
if __name__ == "__main__":
pdf_path = r"C:/Users/erik7/Documents/Late Scans for Testing/scans_template2.pdf"
output_fmt = 'jpeg'
img_dpi = 300
pop_path = r"C:\Users\erik7\Downloads\poppler-0.90.1\bin"
output_path = r"C:\Users\erik7\Downloads"
converted_path = r"C:\Users\erik7\Downloads\converted_images"
converted = pdf2image.convert_from_path(pdf_path = pdf_path, fmt = output_fmt, dpi = img_dpi, poppler_path = pop_path, output_folder = converted_path, grayscale = True, thread_count = 2)
results = []
iterable = [[img, page_num] for page_num, img in enumerate(converted)]
p = multiprocessing.Pool()
r = p.starmap(extract, iterable)
results.append(r)
p.close()
print("\n**PROCESS COMPLETED SUCCESSFULLY")
关于python - 类型错误 : __init__() takes 1 positional argument but 2 were given (Python multiprocessing with Pytesseract)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/63652209/