python - 在 macOS 上使用适用于 Python 3.6.8 的 dbm.gnu

Question

我在 macOS 上使用适用于 Python 3.6.8 的 dbm.gnu 时遇到一些问题。我已经使用 conda 在 Python 虚拟环境中安装了 gdbm...但是在尝试调用 dbm.gnu 时收到以下错误消息:

---------------------------------------------------------------------------
error                                     Traceback (most recent call last)
<ipython-input-2-11fcf8fc693c> in <module>
      1 # Downloads the HI data in a fits file format
      2 hi_datafile = download_file('http://cdsarc.u-strasbg.fr/vizier/ftp/cats/J/A+A/594/A116/CUBES/GAL/TAN/TAN_C14.fits',
----> 3                             cache = True, show_progress = True)

/anaconda3/envs/py36-stable/lib/python3.6/site-packages/astropy/utils/data.py in download_file(remote_url, cache, show_progress, timeout)
   1010         if cache:
   1011             # We don't need to acquire the lock here, since we are only reading
-> 1012             with shelve.open(urlmapfn) as url2hash:
   1013                 if url_key in url2hash:
   1014                     return url2hash[url_key]

/anaconda3/envs/py36-stable/lib/python3.6/shelve.py in open(filename, flag, protocol, writeback)
    241     """
    242 
--> 243     return DbfilenameShelf(filename, flag, protocol, writeback)

/anaconda3/envs/py36-stable/lib/python3.6/shelve.py in __init__(self, filename, flag, protocol, writeback)
    225     def __init__(self, filename, flag='c', protocol=None, writeback=False):
    226         import dbm
--> 227         Shelf.__init__(self, dbm.open(filename, flag), protocol, writeback)
    228 
    229 

/anaconda3/envs/py36-stable/lib/python3.6/dbm/__init__.py in open(file, flag, mode)
     89     elif result not in _modules:
     90         raise error[0]("db type is {0}, but the module is not "
---> 91                        "available".format(result))
     92     else:
     93         mod = _modules[result]

error: db type is dbm.gnu, but the module is not available

有什么可靠的方法可以让它发挥作用吗？当从 astropy 调用 download_file 时，我可以通过设置 cache = False 来关闭缓存...但我真的想设置 cache = True。任何帮助将非常感激。

Answer 1

所以我最终做了一些不可取但有效的事情，那就是改变“/anaconda3/envs/py36-stable/lib/python3.6/dbm/gnu.py”中的唯一一行

from _gdbm import *

到

from _dbm import *

...这对我有用。