f-string formatting in Python
Python's inline template strings, with formatting built in.
name = "Marie"
score = 0.91234
count = 1234567
banner = f"Welcome back, {name}!"
percent = f"accuracy: {score:.1%}"
padded = f"|{name:>10}|"
grouped = f"{count:,} rows"
debug = f"{score=}"
math = f"double: {score * 2:.3f}"How it works
- Interpolates any expression inside
{}braces. - Format specs after
:handle percent, padding, commas. {score=}prints the expression and its value for debugging.
The run, in numbers
- Lines
- 11
- Characters to type
- 224
- Tokens
- 76
- Three-star pace
- 85 tpm
At the three-star pace of 85 tokens a minute, this run takes about 54 seconds.
Step 1 of 9 in Strings, step 7 of 72 in Language basics.