Os Deadlock Dining Philosophers

import threading
forks=[threading.Lock() for _ in range(5)]
def philosopher(i):
    left=i; right=(i+1)%5
    while True:
        forks[left].acquire()  # all pick left first -> deadlock!
        forks[right].acquire()
        print(f'{i} eating')
        forks[right].release(); forks[left].release()

import threading
forks=[threading.Lock() for _ in range(5)]
def philosopher(i):
    left=i; right=(i+1)%5
    while True:
        if i==4:  # last philosopher picks right first
            first,second=right,left
        else:
            first,second=left,right
        with first:
            if forks[second].acquire(timeout=0.1):
                try: print(f'{i} eating')
                finally: forks[second].release()
# Or: max 4 philosophers eat simultaneously
sema=threading.Semaphore(4)
def philosopher(i):
    while True:
        with sema:
            with forks[i]:
                with forks[(i+1)%5]:
                    print(f'{i} eating')