Apparently broken pycurl dependency in Splunk App

[scientiamobile]

Hello,

   I'm trying to develop an App for Splunk. This app contains a Python 3 script which contains some dependencies. One of these dependencies imports pycurl, but when I try to launch the script using this command: 

splunk cmd python3 /opt/splunk/etc/apps/wurfl_device_detection_splunk/bin/wurfl_device_detection.py

this is what I get:

Traceback (most recent call last):
  File "/opt/splunk/etc/apps/wurfl_device_detection_splunk/bin/wurfl_device_detection.py", line 45, in <module>
    wm_client = get_or_create_wm_client()
  File "/opt/splunk/etc/apps/wurfl_device_detection_splunk/bin/wurfl_device_detection.py", line 27, in get_or_create_wm_client
    globals()["wm_client"] = WmClient.create("http", wm_host, wm_port, "")
  File "/opt/splunk/etc/apps/wurfl_device_detection_splunk/bin/wmclient/wmclient.py", line 77, in create
    client = WmClient()
  File "/opt/splunk/etc/apps/wurfl_device_detection_splunk/bin/wmclient/wmclient.py", line 65, in __init__
    self.curl_post = pycurl.Curl()
AttributeError: module 'pycurl' has no attribute 'Curl'

- libcurl is properly installed

- I'm using both pycurl and wmclient dependencies in other python apps outside of Splunk and they work fine. I've copied them into the bin/ directory of my Splunk App to make them visible.

- I've copied the pycurl.cpython-38-x86_64-linux-gnu.so file into the <splunk_home>/lib/python3.7/site-packages directory. 

But I'm still getting this error message.

Am I missing something? Should I put the .so file somewhere else? From the backtrace I'd guess that the pycurl python script is found but it cannot find the libcurl it wraps.

Any suggestion?