obfsproxy running on centos 7

[SMQS_500]

I am using CentOS 7 os.
I installed python3.6 on this machine.
pip3 is latest version 21.
After that i installed obfsproxy like this :

To use obfsproxy you will need Python (>= 2.7) and pip.

Here is link. > Check HOWTO.txt please

    pip3 install pathlib
    pip3 install pyopenssl
    pip3 install Twisted
    pip3 install obfsproxy

Here are installation path :

/usr/local/lib/python3.6/site-packages/obfsproxy-0.2.13-py3.6.egg-info

/usr/local/lib/python3.6/site-packages/obfsproxy

/usr/local/lib/python3.6/site-packages/obfsproxy/pyobfsproxy.py

/usr/local/bin/obfsproxy

Now after running obfsproxy command i got this error :

    Traceback (most recent call last):
      File "/usr/local/bin/obfsproxy", line 11, in <module>
        load_entry_point('obfsproxy==0.2.13', 'console_scripts', 'obfsproxy')()
      File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 476, in load_entry_point
        return get_distribution(dist).load_entry_point(group, name)
      File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2700, in load_entry_point
        return ep.load()
      File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2318, in load
        return self.resolve()
      File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2324, in resolve
        module = __import__(self.module_name, fromlist=['__name__'], level=0)
      File "/usr/local/lib/python3.6/site-packages/obfsproxy/pyobfsproxy.py", line 183
        except ValueError, err:
                         ^
    SyntaxError: invalid syntax
    [root@blobloblo ~]# obfsproxysite-packages/pkg_resources/__init__.py", line 476, in load_entry_point

What version of python is suitable for this script and how can i fix this error?
I tried some older python versions.
Buy manual installation has some error and this is better to install python3 from default repository.
Mean for install python3 i did this :

   centos is updated totally.

    sudo yum install -y epel-release
    
    sudo yum install -y libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev
    
    sudo yum -y groupinstall "Development Tools"
    gcc --version
    
    openssl version
    openssl version -d
    
    sudo yum install -y openssl-devel libyaml-devel libffi-devel bzip2-devel
    sudo yum install -y make automake gcc glibc
    sudo yum install -y gcc
    
    python -V
    python --version
    python2 -V
    python3 -V
    
    sudo yum install python3
    python3 -m pip install --upgrade pip