Strings and text
Strings hold text. Index and slice them like lists, tidy them with methods, and build messages with f-strings. Methods never change the original.
Text is a sequence
A string is text in quotes. Like a list, it has positions: tag = "NeonFox", then tag[0] is "N", tag[-1] is "x" and tag[:4] is "Neon". len(tag) counts the characters, and "Fox" in tag checks for a piece of text.
An f-string drops values into text: f"{tag} has {hp} HP". Anything inside the curly brackets is worked out first.
Methods give back new strings
A string can never be changed in place. tag.upper() does not alter tag. It makes a new string and hands it back, so you have to catch it with a name:
tag = " NeonFox "
tag.strip() # result thrown away
tag = tag.strip() # now tag is "NeonFox"Handy ones: strip() trims spaces at both ends, lower() and upper() change case, replace("a", "b") swaps text, and split() cuts a sentence into a list of words.
Run it: a chat message
Run it, then change one thing and run it again.
message = " gg EVERYONE, good game "
clean = message.strip().lower()
words = clean.split()
print(clean)
print(len(words), "words, first is", words[0])
print(f"Shouted: {clean.upper()}!")
print("Polite?", "good game" in clean)
The username that stays messy
New usernames are stored trimmed and in lower case. This should print @neonfox99 but the spaces and capitals are still there. Fix it.
username = " NeonFox99 "
username.strip()
username.lower()
print("@" + username)