CODEWITHSUNDEEP
pythonfloatinginteger-divisiondivide-by-zero
rahdirs
rahdirs

Reputation: 13

ZeroDivisionError: float division by zero even though I have a zero catcher

I'm a little new to Python. I have attached a snippet of code below. constant_a & b are integers. While running this code, I get the following error:

Traceback (most recent call last): File "U:\V10_run2\process.py", line 209, in delta_mcs_2_gfx_percentage=(delta_mcs_2_gfx*100)/float(mcs) ZeroDivisionError: float division by zero

mcs=hash["MCF"]*constant_a/constant_b  

if mcs is 0:
      delta__percentage=-100
else:
      delta__percentage=(delta*100)/mcs

As the error says I thought this was because python was trying to do a integer division & rounding mcs to 0 but I also tried float(delta*100)/float(mcs) which didn't help as well. Any suggestions ??

Upvotes: 0

Views: 2892

Answers (2)

GranolaGuy
GranolaGuy

Reputation: 132

You are using is when you should be using ==.

is checks for the identical instances. IS this thing the same thing as this other thing

== checks for equality of the same or different instances. Is 0 EQUAL to 0.0?

My bet is that you are checking to see if 0 IS 0.0, which is it not. Then, when you divide by 0.0, you get the Error.

Upvotes: 1

andrew_reece
andrew_reece

Reputation: 21284

Try using == instead of is:

a = 0.0

if a is 0:
    print("is zero")
else:
    print("not zero")
# 'not zero'

if a == 0:
    print("== zero")
else:
    print("not zero")
# '== zero'

See this post for a bit more explanation. Essentially, == tests for equality and is tests for exact object identity.

Upvotes: 6

Related Questions