Python.Runtime.PythonException: ImportError: DLL load failed: 文件名或拓展名太长。 #2365

Environment

• Pythonnet version:
• Python version: 3.7.5
• Operating System: Windows 7
• .NET Runtime: .NET Framework 4.5

Details

at the start of my exe, i'm trying to import my python module, but when i call Py.Import() method. i got an exception with following msg: "Python.Runtime.PythonException: ImportError: DLL load failed: 文件名或拓展名太长。"

My "Python.Runtime.dll" is located in the path below:
D:\槽式清洗机\3.4.0RC02\wet_bench_cassetteless_pr_strip_btc-Wet_Bench_CassetteLess_PR_Strip_BTC_3.4.0_RC_04\wet_bench_cassetteless_pr_strip_btc-Wet_Bench_CassetteLess_PR_Strip_BTC_3.4.0_RC_04\bin\Python.Runtime.dll

when i reduce the file path, the exception is not throwed anymore.

I'm wondering what's file path length limitation for this, cuz the path length above is not exceeding 260 or 255 charactes, which are the limitation for windows 7.