python使用zipfile报错AttributeError: 'NoneType' object has no attribute 'LZMADecompressor'

秦羽 2022-09-26 AM 265℃ 0条

### 问题
Centos下使用zipfile时报错：
```bash
  File "/usr/local/python3/lib/python3.7/zipfile.py", line 1577, in extract
    return self._extract_member(member, path, pwd)
  File "/usr/local/python3/lib/python3.7/zipfile.py", line 1649, in _extract_member
    shutil.copyfileobj(source, target)
  File "/usr/local/python3/lib/python3.7/shutil.py", line 79, in copyfileobj
    buf = fsrc.read(length)
  File "/usr/local/python3/lib/python3.7/zipfile.py", line 876, in read
    data = self._read1(n)
  File "/usr/local/python3/lib/python3.7/zipfile.py", line 959, in _read1
    data = self._decompressor.decompress(data)
  File "/usr/local/python3/lib/python3.7/zipfile.py", line 608, in decompress
    self._decomp = lzma.LZMADecompressor(lzma.FORMAT_RAW, filters=[
AttributeError: 'NoneType' object has no attribute 'LZMADecompressor'

```

### 解决方法
第一步

```bash
yum install xz-devel
yum install python-backports-lzma
pip install backports.lzma
```

第二步

```bash
cd /usr/local/lib/python3.8
vi lzma.py
```

最后,修改一下第27行

```python
try:
    from _lzma import *
    from _lzma import _encode_filter_properties, _decode_filter_properties
except ImportError:
    from backports.lzma import *
    from backports.lzma import _encode_filter_properties, _decode_filter_properties
```

### 参考
https://github.com/ultralytics/yolov5/issues/1298

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