python for 循环，带 2 个计数器

Question

I'd like to create a single for loop using 2 variables, instead of a for loop and an external variable.

Is there a way to do something unpacking tuples with range?

Here is what I have:

space = height
for h in range(height):
    # code using both h & space

Here is the code I'm trying to improve:

# Get positive integer between 1 - 8
while True:
    height = int(input("Height: "))
    if height > 0 and height < 9:
        break

space = height  # Control space count

# Build the pyramid
for h in range(height):
    print(" " * (space - 1),"#" * (h + 1), end="")
    print(" ", end="")
    print( "#" * (h + 1), " " * (space - 1), end="")
    space -= 1

    print()  # Get prompt on \n

Answer 1

You can use a second range object (from height to 0 ) and then zip to iterate both ranges at once:

# Get positive integer between 1 - 8
while True:
    height = int(input("Height: "))
    if height > 0 and height < 9:
        break

# Build the pyramid
for h, space in zip(range(height), range(height, 0, -1)):
    print(" " * (space - 1),"#" * (h + 1), end="")
    print(" ", end="")
    print( "#" * (h + 1), " " * (space - 1), end="")

    print()  # Get prompt on \n