no clear python example to disable dictionary, please add examples

[estatistics]

no clear python example to disable dictionary, please add examples
I found only one instance of python example how to disable the dictionary while you explicitly says you cant without init them.

python, cfg = '--psm 8 --oem 3 -c load_system_dawg=false -c load_freq_dawg=false -c tessedit_char_whitelist=0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIKLMNOPQRSTUVWXYZ_.'