demo.py

inp = []

try:
    f = open("6.txt", "r")
    data = f.read()
    inp = data.split()
    f.close()
except:
    print("No file")


# from the beginning
while int(inp[0]) == 0:
    inp.pop(0)

# the same from the end
L = len(inp)
while int(inp[L-1]) == 0:
    inp.pop(L-1)
    L -= 1


print(str(inp) + "\n\n-----")