python issue

Question

import sys
if len(sys.argv) < 3:
print("Not enough arguments.")
elif len(sys.argv) > 3:
print("Too many arguments.")
else :
r=float(sys.argv[1])
h=float(sys.argv[2])
if r < 0:
print("Radius cannot be negative.")
elif h < 0:
print("Height cannot be negative.")
else:
print("The volume of the cylinder is " + '3.141592'*(r**2)*h)
File "cylinder.py", line 8
h=float(sys.argv[2])
^
IndentationError: unindent does not match any outer indentation level
What's wrong here？

Answer 1

import sys
if len(sys.argv) < 3:
print("Not enough arguments.")
elif len(sys.argv) > 3:
print("Too many arguments.")
else :
r=float(sys.argv[1])
h=float(sys.argv[2])
if r < 0:
print("Radius cannot be negative.")
elif h < 0:
print("Height cannot be negative.")
else:
print("The volume of the cylinder is " + '3.141592'*(r**2)*h)
It really matters in Python to have the same number of spaces in before the code. If the code is inside a with, if, else, for etc. statements, it needs to have extra spaces (or indent)

Answer 2

Looks like an indentation error. This doesn't give an error:
import sys
if len(sys.argv) < 3:
print("Not enough arguments.")
elif len(sys.argv) > 3:
print("Too many arguments.")
else :
r=float(sys.argv[1])
h=float(sys.argv[2])
if r < 0:
print("Radius cannot be negative.")
elif h < 0:
print("Height cannot be negative.")
else:
print("The volume of the cylinder is " + '3.141592'*(r**2)*h)