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Simple python code wont work. I cant tell why. I am new to python. Its derivative calculator  RSS feed

 
Greenhorn
Posts: 19
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I found this python code below from this link and was trying to get it to work. Its simple derivative calculator.
https://medium.com/@jamesetaylor/create-a-derivative-calculator-in-python-72ee7bc734a4

The answer should show up as 4. Can someone tell me why it wont work? I am completely new
to python. I created it in Notepad plus and am running from Windows 7 command prompt.
I get no errors but the answer does not show up. Anyone now why? thank you

#--------------begin code-------------
#import math package to allow for more function arguments
from math import*


def f(x):
#type your function after return
return x**2

#For instance f(2) = 4

def derive(function,value):
h = 0.00000000001
top = function(value + h) - function(value)
bottom = h
slope = top / bottom
# Returns the slope to the third decimal
return float("%.3f" % slope)


derive(f, 2)

#---------------end code--------------
 
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