Format in python by variable length

Question

I want to print a staircase like pattern using .format() method. I tried this,

for i in range(6, 0, -1):
    print("{0:>"+str(i)+"}".format("#"))

But it gave me following error :

ValueError: Single '}' encountered in format string

Basically the idea is to print

     #
    #
   #
  #
 #
#

with code that looks similar to,

for i in range(6, 0, -1):
    print("{0:>i}".format("#"))

Answer 1

Much simpler : instead of concatenating strings, you can use format again

for i in range(6, 0, -1): 
    print("{0:>{1}}".format("#", i))

Try it in idle:

>>> for i in range(6, 0, -1): print("{0:>{1}}".format("#", i))

     #
    #
   #
  #
 #
#

Or even fstring (as Florian Brucker suggested - I'm not an fstrings lover, but it would be incomplete to ignore them)

for i in range(6, 0, -1): 
    print(f"{'#':>{i}}")

in idle :

>>> for i in range(6, 0, -1): print(f"{'#':>{i}}")

     #
    #
   #
  #
 #
#