"How to use append or extend function using def function in python?"

Question

I am trying to append or extend values by using "def" function, but, I am getting an error numpy.float64 object is not iterable

Basically, I want to store different slopes values in the variable name "all_slope" by using extend or append function. I am passing four different values in call function that is a slope. Would, it possible to help me?

all_slope=[]
def slope(x1,x2,y1,y2):
    x=x2-x1
    y=y2-y1
    slope_value=(y/x)
    all_slope.extend(slope_value)
    return all_slope
slope(3,2,4,2)

`all_slope` is a global variable, you don't really need that `return` — mfitzp, Feb 19 '19 at 07:54
@sahaj Patel, if the answer posted below helped you may accept it: https://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work — DirtyBit, Mar 05 '19 at 07:01

DirtyBit · Answer 1 · 2019-02-19T08:08:02.563

2

Use append instead of extend:

Why:

extend: Extends list by appending elements from the iterable.

append: Appends object at the end.

Hence:

all_slope=[]
def slope(x1,x2,y1,y2):
    x=x2-x1
    y=y2-y1
    slope_value=(y/x)
    all_slope.append(slope_value)
    return all_slope

print(slope(3,2,4,2))

OUTPUT:

[2.0]

EDIT:

Good catch by @ mfitzp, Since all_slope is a global var, you could just call the function and then print the list without return:

all_slope=[]
def slope(x1,x2,y1,y2):
    x=x2-x1
    y=y2-y1
    slope_value=(y/x)
    all_slope.append(slope_value)

slope(3,2,4,2)
print(all_slope)

edited Feb 19 '19 at 08:08

answered Feb 19 '19 at 07:45

DirtyBit

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@sahajpatel if the answer helped, you may click on the tick sign beside it to accept it. Cheers – DirtyBit Feb 19 '19 at 15:52
Sorry, I can't . Because I am a new user. I need to gain more reputation for that. – sahaj patel Feb 19 '19 at 18:58
@sahajpatel you can always accept an answer after 15 minutes of asking a question: https://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work – DirtyBit Feb 20 '19 at 06:20

score 0 · Answer 2 · answered Feb 19 '19 at 07:45

0

change all_slope.extend(slope_value) to all_slope.append(slope_value)

answered Feb 19 '19 at 07:45

Alb

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Thanks for your suggestion – sahaj patel Feb 19 '19 at 15:40

"How to use append or extend function using def function in python?"

2 Answers2