>>> name = 'yiyi'
>>> for i in range(3):
... print(f"Task {name}: Compute factorial({i})...") # has f
...
Task yiyi: Compute factorial(0)...
Task yiyi: Compute factorial(1)...
Task yiyi: Compute factorial(2)...
>>> for i in range(3):
... print("Task {name}: Compute factorial({i})...") # has no f
...
Task {name}: Compute factorial({i})...
Task {name}: Compute factorial({i})...
Task {name}: Compute factorial({i})...
>>>
f"Task {name}: Compute factorial({i})..."
等同于
"Task {name}: Compute factorial({i})..."`.format(name, i)
