CODEWITHSUNDEEP
pythonipythontypeerror
Balakrishnan
Balakrishnan

Reputation: 2441

unexpected TypeError with ipython

Yesterday I did the following program and it was running without any error in the Spyder IDE for Windows with IPython Interpreter. But today I don't know what happened it showing me an error. So, I also tried this in the Spyder IDE for Ubuntu but it shows the same error.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 487, in runfile
    execfile(filename, namespace)
  File "C:\Users\BK\.spyder2\.temp.py", line 23, in <module>
    print sum_prime(2000000)
  File "C:\Users\BK\.spyder2\.temp.py", line 21, in sum_prime
    return sum(suspected) + sum_p
TypeError: unsupported operand type(s) for +: 'set' and 'int'

Program:

import math

def is_prime(num):
    if num < 2: return False
    if num == 2: return True
    if num % 2 == 0: return False
    for i in range(3, int(math.sqrt(num)) + 1, 2):
        if num % i == 0: return False
    return True

def sum_prime(num):
    if num < 2: return 0
    sum_p = 2
    core_primes = []
    suspected = set(range(3, num + 1, 2))
    for i in range(3, int(math.sqrt(num)) + 1, 2):
        if is_prime(i): core_primes.append(i)
    for p in core_primes:
        sum_p += p
        suspected.difference_update(set(range(p, num + 1, p)))
    return sum(suspected) + sum_p

print sum_prime(2000000)

But it executes successfully when I execute this in dedicated python interpreter or external system terminal.

Upvotes: 2

Views: 263

Answers (1)

root
root

Reputation: 80426

You are using numpy.core.fromnumeric.sum not the python builtin function (IPython is importing it behind the scenes):

In [1]: sum
Out[1]: <function numpy.core.fromnumeric.sum>

In [2]: sum({1,2,3,4})
Out[2]: set([1, 2, 3, 4])  # returns a set

In [3]: del sum

In [4]: sum({1,2,3,4})
Out[4]: 10

You can fix this by making sure you are using the "right sum" :

import __builtin__
sum = __builtin__.sum

Upvotes: 1

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