Python无法加载OpenALPR，在命令行界面中工作正常

Question

我正在尝试在我的Raspberry Pi上安装OpenALPR，带有Raspbian4.19和Python3.7。

我按照本指南安装OpenAlpr，当从命令行界面调用它时，它工作得很好。我现在正试着用一个小的python脚本让它工作，但是我甚至不能加载OpenAlpr。我的代码：

from openalpr import Alpr
import json
import sys
from time import sleep
alpr = Alpr("eu", "/etc/openalpr/openalpr.conf",
            "/usr/share/openalpr/runtime_data")
analysis = alpr.recognize_file("./500front.jpg")
print(json.dumps(analysis, indent=4))

使用sudo python3 testscript.py运行时，会发生以下错误：

Traceback (most recent call last):
  File "testingcamera.py", line 6, in <module>
    "/usr/share/openalpr/runtime_data")
  File "/usr/local/lib/python3.7/dist-packages/openalpr/openalpr.py", line 85, in __init__
    self._recognize_raw_image_func = self._openalprpy_lib.recognizeRawImage
  File "/usr/lib/python3.7/ctypes/__init__.py", line 369, in __getattr__
    func = self.__getitem__(name)
  File "/usr/lib/python3.7/ctypes/__init__.py", line 374, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /usr/lib/libopenalprpy.so: undefined symbol: recognizeRawImage
Exception ignored in: <function Alpr.__del__ at 0x76598198>
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/openalpr/openalpr.py", line 258, in __del__
    if self.is_loaded():
  File "/usr/local/lib/python3.7/dist-packages/openalpr/openalpr.py", line 135, in is_loaded
    if not self.loaded:
AttributeError: 'Alpr' object has no attribute 'loaded'

Answer 1

它看起来像是安装的ALPR库的版本与python绑定的版本不匹配。

查看此处：https://github.com/openalpr/openalpr/issues/311