问如何用Python从两列pdf中提取文本？

EN

# https://github.com/jsvine/pdfplumber

import pdfplumber


x0 = 0    # Distance of left side of character from left side of page.
x1 = 0.5  # Distance of right side of character from left side of page.
y0 = 0  # Distance of bottom of character from bottom of page.
y1 = 1  # Distance of top of character from bottom of page.

all_content = []
with pdfplumber.open("file_path") as pdf:
    for i, page in enumerate(pdf.pages):
        width = page.width
        height = page.height

        # Crop pages
        left_bbox = (x0*float(width), y0*float(height), x1*float(width), y1*float(height))
        page_crop = page.crop(bbox=left_bbox)
        left_text = page_crop.extract_text()

        left_bbox = (0.5*float(width), y0*float(height), 1*float(width), y1*float(height))
        page_crop = page.crop(bbox=left_bbox)
        right_text = page_crop.extract_text()
        page_context = '\n'.join([left_text, right_text])
        all_content.append(page_context)
        if i < 2:  # help you see the merged first two pages
            print(page_context)

from PIL import Image
import pytesseract
import cv2
import os

def parse(image_path, threshold=False, blur=False):
    image = cv2.imread(image_path)
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    if threshold:
        gray = cv2.threshold(gray, 0, 255, \
            cv2.THRESH_BINARY | cv2.THRESH_OTSU)[1]
    if blur: #useful if salt-and-pepper background.
        gray = cv2.medianBlur(gray, 3)
    filename = "{}.png".format(os.getpid())
    cv2.imwrite(filename, gray) #Create a temp file
    text = pytesseract.image_to_string(Image.open(filename))
    os.remove(filename) #Remove the temp file
    text = text.split() #PROCESS HERE.
    print(text)
a = parse(image_path, True, False)