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| -rw-r--r-- | bot/resources/tags/mutability.md | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/bot/resources/tags/mutability.md b/bot/resources/tags/mutability.md index 3447109ad..ef2f47403 100644 --- a/bot/resources/tags/mutability.md +++ b/bot/resources/tags/mutability.md @@ -4,11 +4,11 @@ Imagine that you want to make all letters in a string upper case. Conveniently, You might think that this would work: ```python ->>> string = "abcd" ->>> string.upper() -'ABCD' ->>> string -'abcd' +>>> greeting = "hello" +>>> greeting.upper() +'HELLO' +>>> greeting +'hello' ``` `string` didn't change. Why is that so? @@ -16,13 +16,13 @@ You might think that this would work: That's because strings in Python are _immutable_. You can't change them, you can only pass around existing strings or create new ones. ```python ->>> string = "abcd" ->>> string = string.upper() ->>> string -'ABCD' +>>> greeting = "hello" +>>> greeting = greeting.upper() +>>> greeting +'HELLO' ``` -`string.upper()` creates and returns a new string which is like the old one, but with all the letters turned to upper case. +`greeting.upper()` creates and returns a new string which is like the old one, but with all the letters turned to upper case. `int`, `float`, `complex`, `tuple`, `frozenset` are other examples of immutable data types in Python. |