Using PI in python 2.7

Question

I am trying to access the value of pi in Python 2.7, but it seems as if Python doesn't recognize math.pi. I am using IDLE, and when I try to print the value of math.pi, it says that "Math is not defined" or "math is not defined". I can't upgrade to the next version without risk, so is there a way to access pi in Python 2.7? Alternatively, is there another way to convert degrees to radians in Python 2.7 without dealing with Pi?

Did you import the math module with import math?

BrenBarn
– BrenBarn

2013-09-17 05:11:42 +00:00
Commented Sep 17, 2013 at 5:11 — BrenBarn
– BrenBarn, Commented Sep 17, 2013 at 5:11

Tim Pietzcker · Accepted Answer · 2013-09-17 05:13:23Z

47

Python 2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import math
>>> math.pi
3.141592653589793

Check out the Python tutorial on modules and how to use them.

As for the second part of your question, Python comes with batteries included, of course:

>>> math.radians(90)
1.5707963267948966
>>> math.radians(180)
3.141592653589793

answered Sep 17, 2013 at 5:13

Tim Pietzcker

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Comments

Michał Zaborowski · Accepted Answer · 2018-02-09 22:30:02Z

3

To have access to stuff provided by math module, like pi. You need to import the module first:

import math
print (math.pi)

edited Feb 9, 2018 at 22:30

Michał Zaborowski

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answered Feb 9, 2018 at 22:23

katznboyz

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