Normalize Stated Whitespace without Inventing Data
Remove surrounding whitespace and preserve characters inside the stated text.
About 22 minutes, plus any extended practice
Supplied materials
- Paper and pencil; answers may also be spoken or typed.
- All cases, labels, numbers and rules are supplied on this page. No real account, private information or purchase is needed.
Learn the idea
Python strip removes specified leading and trailing characters, or surrounding whitespace when no characters are specified. It does not remove every internal space. Normalization must fit the data contract; removing meaningful content could corrupt a label. Our examples trim only incidental surrounding spaces.
Remove surrounding whitespace and preserve characters inside the stated text. Do not collapse an internal space just because surrounding whitespace is trimmed.
Use this supplied case: Paper Python 3 expression: " red ".strip(). What value results? The task is to connect the given information to the computing idea. Write a short evidence trail so another learner can reproduce your choice. The simplified case describes the stated model, not every real system.
- Represent the supplied worked case with a labeled drawing, table or short trace.
- Remove surrounding whitespace and preserve characters inside the stated text.
- Explain why the worked answer fits and why one alternative does not.
- Try the new check and practice cases; revisit the stated rule if your evidence does not match.
See the method in action
Paper Python 3 expression: " red ".strip(). What value results? The supported answer is 'red'. Tracing the expression under Python 3 rules gives 'red'. Remove surrounding whitespace and preserve characters inside the stated text. Do not collapse an internal space just because surrounding whitespace is trimmed. Python strip removes specified leading and trailing characters, or surrounding whitespace when no characters are specified.
Check your reasoning
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Helpful tips
- Remove surrounding whitespace and preserve characters inside the stated text.
- Do not collapse an internal space just because surrounding whitespace is trimmed.
See the answer and explanation
'blue'
The original text is ' blue '. Remove only surrounding whitespace to obtain 'blue'; every internal character, including internal spaces and leading identifier digits, remains. Remove surrounding whitespace and preserve characters inside the stated text.
Take it further
For text=" green blue ", strip returns"green blue", preserving the internal space. Criteria: only the stated incidental surrounding whitespace is removed.
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More practice: try new cases
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Check the subject sources
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