Python · Theory

str.replace()

Theory

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str.replace()

str.replace is a string helper. You call it on text like "Asha" or "banana". It gives a new string (or a number/True-False). The old string does not change unless you assign the result back.

str.replace() — output — Asha Delhi.

Fresher trap: writing s.str.replace() and expecting s to update. Strings are immutable. Write s = s.str.replace(...) if you need the new value (when it returns a string).

Exam tip

Call str.replace on one real word and say what prints.

Example

# str.replace()
print("Asha Pune".replace("Pune", "Delhi"))

str.replace() — output: Asha Delhi.

Short notes

Defstr.replace works on str.
Rulestr.replace usually returns a new string.
Trapstr.replace does not change the original string in place.

Python · Theory

str.replace()

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Theory

234/268

str.replace()

str.replace is a string helper. You call it on text like "Asha" or "banana". It gives a new string (or a number/True-False). The old string does not change unless you assign the result back.

str.replace() — output — Asha Delhi.

Fresher trap: writing s.str.replace() and expecting s to update. Strings are immutable. Write s = s.str.replace(...) if you need the new value (when it returns a string).

Exam tip

Call str.replace on one real word and say what prints.

Example

# str.replace()
print("Asha Pune".replace("Pune", "Delhi"))

str.replace() — output: Asha Delhi.

Short notes

Defstr.replace works on str.
Rulestr.replace usually returns a new string.
Trapstr.replace does not change the original string in place.

str.replace()

Example

Short notes

Questions

str.replace()

Example

Short notes

Questions