Remove A string from B string

Question

I have manufacture name and a product name which has manufacture name and I want to remove manufacture name form product name, I use the following code but didn't work

I tried both sub and replace methods but didn't work

import re

menufacture_name = "AMPHENOL ICC (COMMERCIAL PRODUCTS)"

product_name = "AMPHENOL ICC (COMMERCIAL PRODUCTS) - D-SUB CONNECTOR, PLUG, 9POS"

// product_name = re.sub(menufacture_name + " - ", "", product_name)
product_name.replace(menufacture_name + " - ", '')

print("Product name : " + product_name)

This should be the result Product name : D-SUB CONNECTOR, PLUG, 9POS

product_name = product_name.replace(menufacture_name + " - ", '') — Sunil Goyal, Jan 16 '19 at 09:01
[Python strings are immutable](https://docs.python.org/3.4/library/stdtypes.html#text-sequence-type-str), so you cannot modify an existing string. That's why `replace` will not replace in-place. — Jan Christoph Terasa, Jan 16 '19 at 09:04
Why not just `product_name = product_name[len(manufacturer_name) + 3:]`? — Mad Physicist, Jan 16 '19 at 09:07

score 1 · Answer 1 · answered Jan 16 '19 at 09:01

replace doesn't replace the current string. It will return a copy of the modified string.

Note: In Python strings are immutable.

Try like below:

modified_string = product_name.replace(menufacture_name + " - ", '')

print("Product name : " + modified_string)

score 1 · Answer 2 · answered Jan 16 '19 at 09:03

Here's one way to do it, you just have to assign the result of the replace, because the original string is not modified in-place (strings are immutable in Python, so all string operations return a new one instead):

product_name = product_name.replace(menufacture_name, "").strip("- ")

product_name
=> 'D-SUB CONNECTOR, PLUG, 9POS'

Notice that I used strip() to remove the extra "- " characters from one side, so the output string will look nicer.

score 1 · Accepted Answer · answered Jan 16 '19 at 09:05

1

Strings are immutable. Your code is correct just that you forgot to assign the replace back to the string.

product_name = product_name.replace(menufacture_name + " - ", '')

This should work.

answered Jan 16 '19 at 09:05

Mayank Porwal

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Remove A string from B string

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