For syntax help:
python cli.py -h
You will need to supply your Twitter application OAuth credentials. The easiest option is to save them in TwitterAPI/credentials.txt. It is the default place where cli.py will look for them. You also may supply an alternative credentials file as a command-line argument.
Call any REST API endpoint:
python cli.py -endpoint statuses/update -parameters status='my tweet'
Another example (here using abbreviated option names) that parses selected output fields:
python cli.py -e search/tweets -p q=zzz count=10 -field screen_name text
Calling any Streaming API endpoint works too:
python cli.py -e statuses/filter -p track=zzz -f screen_name text
After the -field option you must supply one or more key names from the raw JSON response object. This will print values only for these keys. When the -field option is omitted cli.py prints the entire JSON response object.