Why i can't format the string (python)

Question

My code:
a = (12,13,13)
syrs = "result:"
for i in range(len(a)):
syrs = syrs + " " "{" + str(i) + "}"
syrs.format(a[0],a[1],a[2])
print(syrs)

But it writes result: {0} {1} {2} not result: 12 13 13

Answer 1

You should try f strings in your programme like this.

print(f'result: {a[0]} {a[1]} {a[2]}')

Answer 2

a = (12,13,13)
syrs = "result:"
for i in range(len(a)):
syrs += " "+str(a[i])
print(syrs)