pyocrにて長いエラーが出て検索のしようがない

Question

###pyocrにて長いエラーが出て検索のしようがない

pyocrを用いた簡単な文字認識コードを書いているのですが、
エラー文が長く検索の仕方も難しいため
非常に解決にたどり着けず困っています。

実行結果

<module 'pyocr.tesseract' from 'C:\Users\プライベート\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyocr\tesseract.py'>

Warning (from warnings module):
  File "C:\Users\プライベート\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\PIL\Image.py", line 975
    warnings.warn(
UserWarning: Palette images with Transparency expressed in bytes should be converted to RGBA images
Traceback (most recent call last):
  File "C:\Users\プライベート\Desktop\python\test.py", line 14, in <module>
    txt = tool.image_to_string(
  File "C:\Users\プライベート\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyocr\tesseract.py", line 369, in image_to_string
    raise TesseractError(status, errors)
pyocr.error.TesseractError: (1, b'Error opening data file C:\Program Files\Tesseract-OCR\tessdata/jpn.traineddata\r\nPlease make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory.\r\nFailed loading language \'jpn\'\r\nTesseract couldn\'t load any languages!\r\nCould not initialize tesseract.\r\n')
>>> 

該当のソースコード

from PIL import Image
import sys
import pyocr
import pyocr.builders


pyocr.tesseract.TESSERACT_CMD = r"C:\Program Files (x86)\Tesseract-OCR\tesseract.exe"

tools = pyocr.get_available_tools()
tool = tools[0]

print(tool)
picture = Image.open("test1.png")
txt = tool.image_to_string(
    picture,
    lang="jpn",
    builder = pyocr.builders.TextBuilder(tesseract_layout = 3)
)
print(txt)

###追記
環境変数「TESSDATA_PREFIX」を設定しようと試みましたが
改善の余地は見られませんでした。
以下ソースコード

from PIL import Image
import sys
import os
import pyocr
import pyocr.builders



TESSERACT_PATH = 'C:\Program Files (x86)\Tesseract-OCR'
TESSDATA_PATH = 'C:\Program Files (x86)\Tesseract-OCR\tessdata'

os.environ["PATH"] += os.pathsep +TESSERACT_PATH
os.environ["TESSDATA_PREFIX"] = TESSDATA_PATH

tools = pyocr.get_available_tools()
if len(tools) == 0:
    print("p")
tool = tools[0]

print(tool)
picture = Image.open("test1.png")
txt = tool.image_to_string(
    picture,
    lang="jpn",
    builder = pyocr.builders.TextBuilder(tesseract_layout = 3)
)
print(txt)

以下エラー内容

<module 'pyocr.tesseract' from 'C:\Users\プライベート\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyocr\tesseract.py'>

Warning (from warnings module):
  File "C:\Users\プライベート\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\PIL\Image.py", line 975
    warnings.warn(
UserWarning: Palette images with Transparency expressed in bytes should be converted to RGBA images
Traceback (most recent call last):
  File "C:\Users\プライベート\Desktop\python\test.py", line 23, in <module>
    txt = tool.image_to_string(
  File "C:\Users\プライベート\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pyocr\tesseract.py", line 369, in image_to_string
    raise TesseractError(status, errors)
pyocr.error.TesseractError: (1, b'Error opening data file C:\Program Files (x86)\Tesseract-OCR\tessdata/jpn.traineddata\r\nPlease make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory.\r\nFailed loading language \'jpn\'\r\nTesseract couldn\'t load any languages!\r\nCould not initialize tesseract.\r\n')

Comments

[jbpb0]

> Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory.

環境変数「TESSDATA_PREFIX」を設定しろ、と言われてます

参考
https://blog.14nigo.net/2018/03/pyocr.html

[jbpb0]

> 環境変数「TESSDATA_PREFIX」を設定しようと試みましたが
改善の余地は見られませんでした。

https://blog.14nigo.net/2018/03/pyocr.html
のコードと、パス区切り文字が違います

Answer 1

下記URLを参考にしたらなんとかエラーがなくなりました。
png画像を読み込もうとするとエラーが出るのですが、jpg画像ならエラーなく文字認識が実行できるみたいなので解決とします。
jbpb0様、アドバイスありがとうございました。
https://blog.14nigo.net/2018/03/pyocr.html

以下ソースコード

from PIL import Image
import sys
import os
import pyocr
import pyocr.builders



TESSERACT_PATH = 'C://Program Files (x86)//Tesseract-OCR'
TESSDATA_PATH = 'C://Program Files (x86)//Tesseract-OCR//tessdata'

os.environ["PATH"] += os.pathsep + TESSERACT_PATH
os.environ["TESSDATA_PREFIX"] = TESSDATA_PATH

tools = pyocr.get_available_tools()
if len(tools) == 0:
    print("p")
tool = tools[0]

print(tool)
picture = Image.open("f.jpg")
txt = tool.image_to_string(
    picture,
    lang="jpn",
    builder = pyocr.builders.TextBuilder(tesseract_layout = 3)
)
print(txt)