LIbiio and Pyadi-iio install error on Ubuntu 20.04

Hello,

I am trying to use Pyadi-iio package on the Ubuntu. I follow the instruction of this page: https://wiki.analog.com/resources/tools-software/linux-software/pyadi-iio.

1. build libiio from source

2. my python is 3.8

3. run "pip install pylibiio" and "pip install pyadi-iio" 

After that, when I run: python3 -c "import iio; print(iio.__file__); print(iio.version)", the result is:

pci@pci-virtual-machine:~$ python3 -c "import iio; print(iio.__file__); print(iio.version)"
Using Libiio v0.x -> v1.x compatibility layer
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/pci/.local/lib/python3.8/site-packages/iio.py", line 540, in <module>
    _c_read = _lib.iio_channel_read
  File "/usr/lib/python3.8/ctypes/__init__.py", line 386, in __getattr__
    func = self.__getitem__(name)
  File "/usr/lib/python3.8/ctypes/__init__.py", line 391, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /lib/x86_64-linux-gnu/libiio.so.0: undefined symbol: iio_channel_read

when I run: python3 -c "import adi; print(adi.__file__); print(adi.version)", the result is:

pci@pci-virtual-machine:~$ python3 -c "import adi; print(adi.__file__); print(adi.version)"Using Libiio v0.x -> v1.x compatibility layer
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/pci/.local/lib/python3.8/site-packages/adi/__init__.py", line 5, in <module>
    from adi.ad469x import ad469x
  File "/home/pci/.local/lib/python3.8/site-packages/adi/ad469x.py", line 10, in <module>
    from adi.context_manager import context_manager
  File "/home/pci/.local/lib/python3.8/site-packages/adi/context_manager.py", line 5, in <module>
    import iio
  File "/home/pci/.local/lib/python3.8/site-packages/iio.py", line 540, in <module>
    _c_read = _lib.iio_channel_read
  File "/usr/lib/python3.8/ctypes/__init__.py", line 386, in __getattr__
    func = self.__getitem__(name)
  File "/usr/lib/python3.8/ctypes/__init__.py", line 391, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /lib/x86_64-linux-gnu/libiio.so.0: undefined symbol: iio_channel_read

Could you give me some advice? Thanks!

Best,

Dongyu