I read format string mini-language from Python doc and tried to do this:
a = 20000 # I want "+20,000.00 " for the result
print(f"a:+,.2f") # >> +20,000.00
print(f"{a:<20+,.2f}") # >> ValueError: Invalid format specifier
print(f"{a:<20,.2f}") # >> '20,000.00 '
print(f"{a:+<20,.2f}") # >> '20,000.00+++++++++++' # Not what I want
Anything else will give ValueError: Invalid format specifier to me.
Why is it not possible to use <20 argument with + argument?
Actually I found this nested form works but it is suboptimal. Is there any other way?
print(f"{f'{a:+,.2f}':<20}") # >> '+20,000.00 ' # It works but nested form sucks.
