Initial Release

PythonPi.py

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+"""
+Name: pi.py
+Purpose: Get the value of Pi to n number of decimal places
+Author: Pradipta (geekpradd)
+Algorithm: Chudnovsky Algorithm
+License: MIT
+
+Module Dependencies:
+
+Math provides fast square rooting
+Decimal gives the Decimal data type which is much better than Float
+sys is needed to set the depth for recursion.
+"""
+import math, sys
+from decimal import *
+getcontext().rounding = ROUND_FLOOR
+sys.setrecursionlimit(100000)
+if sys.version_info[0] == 2:
+	input = raw_input
+
+def factorial(n):
+	"""
+	Return the Factorial of a number using recursion
+
+	Parameters:
+	n -- Number to get factorial of
+	"""
+	if not n:
+		return 1
+	return n*factorial(n-1)
+
+
+def getIteratedValue(k):
+	"""
+	Return the Iterations as given in the Chudnovsky Algorithm.
+	k iterations gives k-1 decimal places.. Since we need k decimal places
+	make iterations equal to k+1
+	
+	Parameters:
+	k  -- Number of Decimal Digits to get
+	"""
+	k = k+1
+	getcontext().prec = k
+	sum=0
+	for k in range(k):
+		first = factorial(6*k)*(13591409+545140134*k)
+		down = factorial(3*k)*(factorial(k))**3*(640320**(3*k))
+		sum += first/down 
+	return Decimal(sum) 
+
+def getValueOfPi(k):
+	"""
+	Returns the calculated value of Pi using the iterated value of the loop
+	and some division as given in the Chudnovsky Algorithm
+
+	Parameters:
+	k -- Number of Decimal Digits upto which the value of Pi should be calculated
+	"""
+	iter = getIteratedValue(k)
+	up = 426880*math.sqrt(10005)
+	pi = Decimal(up)/iter 
+
+	return pi
+
+def shell():
+	"""
+	Console Function to create the interactive Shell.
+	Runs only when __name__ == __main__ that is when the script is being called directly
+
+	No return value and Parameters
+	"""
+	print ("Welcome to Pi Calculator. In the shell below Enter the number of digits upto which the value of Pi should be calculated or enter quit to exit")
+
+	while True:
+		print (">>> ", end='')
+		entry = input()
+		if entry == "quit":
+			break
+		if not entry.isdigit():
+			print ("You did not enter a number. Try again")
+		else:
+			print (getValueOfPi(int(entry)))
+
+if __name__=='__main__':
+	shell()

README.md

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+##Value Of Pi in Python
+
+Get the Value of Pi upto n decimal digits using this Python Script. Uses the chudnovsky algorithm implemented using the Pyton Decimal Data Type.
+
+####Installation
+
+If you want to use this as a module, then you can use pip or just download the script to your computer from <a href="">here</a>.
+
+#####Using pip
+
+```
+pip install PythonPi
+```
+
+####Usage
+
+#####Console Usage
+
+Just run the file (if not installed using pip) or enter the following command (if installed using pip):
+
+```
+pythonpi
+```
+
+You can then use the Interactive Shell to do your calculations
+
+#####API Usage
+
+If you for some reason need the value of pi in your program then you can use the module in the following way:
+
+```python
+import PythonPi
+
+print(PythonPi.getValueOfPi(12)) #Upto 12 decimal places
+```
+
+####About
+
+Created By Pradipta Bora (geekpradd) using the Chudnovsky Algorithm. <a href="http://opensource.org/licenses/MIT">MIT </a> Licensed.

setup.py

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+from setuptools import setup
+try:
+    import pypandoc
+    description = pypandoc.convert('README.md','rst')
+except:
+    description=''
+
+setup(
+    name = "PythonPi",
+    version = '1.0.0',
+    author = 'Pradipta Bora',
+    author_email = 'pradd@outlook.com',
+    description = "Get the Value of Pi upto as many decimal places as needed",
+    license = "MIT",
+    keywords = "pi maths",
+    url = "https://github.com/geekpradd/PythonPi",
+    py_modules = ['PythonPi'],
+    entry_points = {
+    'console_scripts': ['pythonpi = PythonPi:shell']
+    },
+    long_description=description,
+    classifiers=[
+     "Development Status :: 5 - Production/Stable",
+          "Topic :: Utilities",
+          "License :: OSI Approved :: MIT License",
+          "Operating System :: OS Independent",
+          "Programming Language :: Python"
+    ],
+
+)