To dream of a python may represent fear of total failure or losses that you can't escape. Feeling that a person or situation will permanently "put the squeeze" on you if you give them any leverage at all. Fearing being destroyed by a enemy that never lets go once they get a grip on you. A problem or negative situation that feels too strong to free yourself from. Believing that once something gets leverage over you that you'll never escape it.
Positively, a python may reflect your attempt to overpower enemies or problems. "Squeezing" the competition. Never giving up on a problem once you get any leverage over it at all. Never letting go or never giving up.
Negatively, a python may reflect abuse of superior power. Never letting go people you want to dominate. Using superiority to stay dominate at all costs. Jealousy of anything ever getting to be dominate over you ever again once you are powerful.
Example: A man dreamed of fighting with a python. In waking life he was struggling against debt collectors that he felt were going to slowly bankrupt him or "squeeze him dry" if he cooperated with them at all.
*Please See Boa Constrictor