Format In Python By Variable Length

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

Solution 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 inrange(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 inrange(6, 0, -1): 
    print(f"{'#':>{i}}")

in idle :

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

     ######

Solution 2:

Currently your code interpreted as below:

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

So the format string is constructed of a single "}" and that's not correct. You need the following:

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

Works as you want:

================ RESTART: C:/Users/Desktop/TES.py ================
     ######
>>>