How to replace plus sign with other string python

Question

user_input = input("INPUT: ")
# 2x-1=1+6
left = user_input.split("=")[0]
right = user_input.split("=")[1]
print(left, right)

left_term = left.replace("+",",+")
left_term = left.replace("-",",-")
right_term = right.replace("+",",+")
right_term = right.replace("-",",-")
print(left_term,right_term)

terms_x = []

It just shows me 2x, -1 1+6

but i want is 2x, -1 1, +6

So, main question is how to replace "+" with other string.

Answer 1

You can replace directly the main string before splitting from = like this:

user_input = input("INPUT: ")
# 2x-1=1+6
spl = user_input.replace("+",", +").replace("-",", -").split("=")
left = spl[0]
right = spl[1]
print(left, right)

terms_x = []

So the output would be: 2x, -1 1, +6

Answer 2

The reason why your code was not working was because you're storing

right_term = right.replace("+",",+")

and again overwriting the value of right_term by

right_term = right_term.replace("-",",-")

because of which the previously replaced string is not being used anymore, hence fixing your code would look like:

user_input = input("INPUT: ")
# 2x-1=1+6
left = user_input.split("=")[0]
right = user_input.split("=")[1]
print(left, right)

left_term = left.replace("+",",+")
left_term = left_term.replace("-",",-")
right_term = right.replace("+",",+")
right_term = right_term.replace("-",",-")
print(left_term,right_term)

terms_x = []

have added this so you could know what was actually causing it to not work.