This script draws processes/threads tree from strace output.
Work with strace v5.15 and above. Set of arguments to right parse output further:
strace -o <strace_output_file> -ttt -Y -f -e trace=execve,clone,exit <command>
./strace-visualizer.py -i <strace_output_file> [-o <image.png>]

1. Install python3 and python3-pip in your system.
2. Install virtualenv package also:
   pip3 install virtualenv
source ~/.profile
   (note for Ubuntu 21.10)
   Installation package virtualenv with sudo apt install python3-virtualenv was cause of error:

"ModuleNotFoundError: No module named 'virtualenv'"

3. Create virtualenv project:
   virtualenv -p python3 <dir_name>
4. source <dir_name>/bin/activate
5. Install the python-requirements:
   pip3 install Pillow

• python3
• python3-pip

Activation python virtual environment must be performed before running script:
source <virtualenv_dir>/bin/activate

./strace-visualizer.py -i <strace_output> [-o <image.png>]

Type deactivate if you need to exit from virtualenv