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Which argument is required when initializing csv.DictWriter to define the columns and their order in the output CSV?

easy📝 Conceptual Q2 of 15
Python - Structured Data Files
Which argument is required when initializing csv.DictWriter to define the columns and their order in the output CSV?
Aquotechar
Bdelimiter
Cfieldnames
Dlineterminator
Step-by-Step Solution
Solution:

  1. Step 1: Understand DictWriter parameters

    csv.DictWriter requires fieldnames to specify column headers and their order.

  2. Step 2: Identify the required argument

    Without fieldnames, the writer cannot know which columns to write or their order.

  3. Final Answer:

    fieldnames -> Option C

  4. Quick Check:

    fieldnames defines columns and order [OK]
Quick Trick: fieldnames sets CSV columns and order [OK]
Common Mistakes:
  • Confusing delimiter or quotechar as required for columns
  • Omitting fieldnames argument

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