python programming using codeskulptor: simple calculator using simplegui

Question

This is my python code where I'm trying to create a simple calculator in CodeSkulptor using SimpleGUI functions. Even though I've defined input1 and input2 I'm ending up with an error:

Line 22: NameError: name 'input2' is not defined

Please help me. Thank you

import simplegui
#initialize globals
def input_handler1(text_input1):
    global input1
    input1=float(text_input1)
    output()
def input_handler2(text_input2):
    global input2
    input2=float(text_input2)
    output()
def button_handler():
    print inp1.get_text
def button_handler():
    print inp2.get_text

def output():
"""prints contents of input1 and input2"""
    print("input1=",input1)
    print("input2=",input2)
    print (" ")

def swap():
"""swap the contents of input1 and input2"""
    global input1,input2
    input1,input2=input2,input1
    output()
def add():
    global input1,input2
    input1+=input2
    output()
def sub():
    global input1,input2
    input1-=input2
    output()
def mul():
    global input1,input2
    input1*=input2
    output() 
def div():
    global input1,input2
    input1/=input2
    output()    

frame=simplegui.create_frame("simple_calculator",500,500)

inp1 = frame.add_input('input1', input_handler1, 50)
inp2 = frame.add_input('input2', input_handler2, 50)

frame.add_button("Print",output,100)
frame.add_button("swap",swap,100)
frame.add_button("add",add,100)
frame.add_button("subtract",sub,100)
frame.add_button("multiply",mul,100)
frame.add_button("divide",div,100)
frame.start()

Answer 1

The indentation of docstrings are wrong. And we need to declare input1 and input2.

Here the corrected code (with some other cosmetic change to respect the PEP 8): http://www.codeskulptor.org/#user45_G2dN41wx9eUEWCd.py

PEP 8 -- Style Guide for Python Code

Answer 2

Assigning Input1=0 Input2=0 Solves the problem. I could fix the issue. Thanks anyway