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What is this error in passing arguments in python? [duplicate]

This question already has an answer here:

I have this code:

import sys
from scipy.stats import binom

def mcnemar_midp(b, c):
n = b + c
x = min(b, c)
dist = binom(n, .5)
p = 2. * dist.cdf(x)
midp = p - dist.pmf(x)
return midp

#get numbers from user
num1 = sys.argv[1]
num2 = sys.argv[2]

# calculate the result
myresult = mcnemar_midp(num1, num2)

# Display the sum
print myresult


which does not work if I call it like this:
python mcnemar.py 87 89

However, if I hard-code 2 values for num1 and num2 it works fine. The error I get is the following:

Traceback (most recent call last):
File "mcnemar.py", line 28, in <module>
myresult = mcnemar_midp(num1, num2)
File "mcnemar.py", line 19, in mcnemar_midp
p = 2. * dist.cdf(x)
File "/usr/lib/python2.7/dist-packages/scipy/stats/distributions.py", line 440, in cdf
return self.dist.cdf(x, *self.args, **self.kwds)
File "/usr/lib/python2.7/dist-packages/scipy/stats/distributions.py", line 6635, in cdf
k = asarray((k-loc))
TypeError: unsupported operand type(s) for -: 'numpy.ndarray' and 'numpy.ndarray'


but this in only if I try to pass the numbers from the command line, if I write them inside the code, it works.
Please help me, I am new to python!

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

num1

num2

num1 = int(sys.argv[1])

num2 = int(sys.argv[2])

n = b + c

x = min(b, c)

b

c

-

ndarray

ndarray

dtypes

object

int

TypeError: ufunc 'add' did not contain a loop with signature matching types dtype('<U12') dtype('<U12') dtype('<U12')

numpy

'1.11.3'

1 Answer
1

The issue was fixed after the sys.argv values were cast to integers.

sys.argv