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Strings

f-strings, common string methods, splitting and joining, and regular expressions with re.

Runs in Zerethon IDE · Python 3.12 Official Python documentation ↗
main.py 
import re

name = "Ada Lovelace"
print(f"{name} has {len(name)} characters")
print(name.upper(), name.lower(), name[:3])
print("  padded  ".strip() + "|")
print("a,b,c".split(","), "-".join(["x", "y", "z"]))
print(name.replace("Ada", "Augusta"), name.startswith("Ada"), "love" in name.lower())
print(f"{3.14159:.2f} {42:>5} {7:03d}")

text = "Order 12 shipped, order 7 pending"
print(re.findall(r"\d+", text))
match = re.search(r"order (\d+) pending", text)
print(match.group(1) if match else "no match")

Output

Ada Lovelace has 12 characters
ADA LOVELACE ada lovelace Ada
padded|
['a', 'b', 'c'] x-y-z
Augusta Lovelace True True
3.14    42 007
['12', '7']
7
  • Strings cannot be changed in place; methods such as replace() return a new string.
  • Use raw strings (r"\d+") for regular expressions so backslashes are kept.
  • re.search() returns None when nothing matches — check before calling .group().

Related topics

Official references