我正在尝试在 python 3.9 版中安装 blpapi
作为记录，我可以使用标准设置并在此页面底部运行 pip 命令来使 3.7 和 3.8 正常工作：
www.bloomberg.com/professional/support/api-library
我需要做的唯一修改是：
对于 3.7 版：
py -3.7 -m pip install --index-url=https://bloomberg.bintray.com/pip/simple blpapi
对于 3.8 版：
py -3.8 -m pip install --index-url=https://bloomberg.bintray.com/pip/simple blpapi
我尝试完全相同的方法，3.9但这会引发错误：
py -3.9 -m pip install --index-url=https://bloomberg.bintray.com/pip/simple blpapi
这是错误：
Looking in indexes: https://bloomberg.bintray.com/pip/simple
Collecting blpapi
Downloading https://bloomberg.bintray.com/pip/simple/blpapi/blpapi-3.15.2.tar.gz (229 kB)
|████████████████████████████████| 229 kB 3.3 MB/s
ERROR: Command errored out with exit status 1:
command: 'C:\Python39\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\darren\\AppData\\Local\\Temp\\pip-install-ldwe3a4a\\blpapi\\setup.py'"'"'; __file__='"'"'C:\\Users\\darren\\AppData\\Local\\Temp\\pip-install-ldwe3a4a\\blpapi\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\darren\AppData\Local\Temp\pip-pip-egg-info-ehpqfebq'
cwd: C:\Users\darren\AppData\Local\Temp\pip-install-ldwe3a4a\blpapi\
Complete output (5 lines):
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\darren\AppData\Local\Temp\pip-install-ldwe3a4a\blpapi\setup.py", line 54, in <module>
assert blpapiRoot or (blpapiIncludesVar and blpapiLibVar), \
AssertionError: BLPAPI_ROOT (or BLPAPI_INCDIR/BLPAPI_LIBDIR) environment variable isn't defined
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
我尝试寻找解决方案，AssertionError: BLPAPI_ROOT (or BLPAPI_INCDIR/BLPAPI_LIBDIR) environment variable isn't defined但没有找到任何可行的方法，此时我被卡住了。
这是我的基本代码：
import os
import sys
#import xbbg
# check python version
if sys.version_info.major == 3:
if sys.version_info.minor == 7:
print('using version: 3.7')
import blpapi
if sys.version_info.major == 3:
if sys.version_info.minor == 8:
print('using version: 3.8')
with os.add_dll_directory('c:/blp/DAPI'):
import blpapi
if sys.version_info >= (3,9):
print('using version: 3.9')
print('version 3.9 and above not working')
sys.exit(0) # i added this to exit before the error message for v 3.9
with os.add_dll_directory('c:/blp/DAPI'):
import blpapi
x = 'hello world'
print(x)
谁能解决这个问题？
（理想情况下可以blpapi使用所有版本）。