- 011. Create DataFrame from dictFree→
- 022. Print first 5 rowsFree→
- 033. Summary statisticsFree→
- 044. Select a specific columnLocked→
- 055. Filter rows by conditionLocked→
- 066. Add a new columnLocked→
- 077. Group by a column and compute meanLocked→
- 088. Sort by a specific columnLocked→
- 099. Drop rows with missing valuesLocked→
- 1010. Merge two DataFramesLocked→
- 1111. Rename a columnLocked→
- 1212. Drop a columnLocked→
- 1313. Fill missing valuesLocked→
- 1414. Replace valuesLocked→
- 1515. Drop duplicatesLocked→
- 1616. Map valuesLocked→
- 1717. Apply function to a columnLocked→
- 1818. Concatenate two DataFramesLocked→
- 1919. Melt (unpivot) a DataFrameLocked→
- 2020. Create a pivot tableLocked→
- 2121. Set a MultiIndexLocked→
- 2222. Unstack a MultiIndexLocked→
- 2323. Insert a row by locLocked→
- 2424. Mask and replace values in a columnLocked→
- 2525. Value counts of a columnLocked→
- 2626. Read from CSV (StringIO)Locked→
- 2727. Write to CSV (StringIO)Locked→
- 2828. Reindex a DataFrameLocked→
- 2929. Set and reset indexLocked→
- 3030. Sort by multiple columnsLocked→
- 3131. Merge with a left joinLocked→
- 3232. Outer join mergeLocked→
- 3333. Aggregate multiple columnsLocked→
- 3434. Map with a dictionaryLocked→
- 3535. Count unique values in a columnLocked→
- 3636. Assign a new column with .assign()Locked→
- 3737. Detect and count duplicatesLocked→
- 3838. Query usageLocked→
- 3939. Pivot from long to wideLocked→
- 4040. Pivot from wide to longLocked→
- 4141. Slice rows with locLocked→
- 4242. Slice by position with ilocLocked→
- 4343. Group by multiple columnsLocked→
- 4444. Merge on multiple keysLocked→
- 4545. Sort groupby resultsLocked→
- 4646. Rolling meanLocked→
- 4747. Shift columnLocked→
- 4848. Insert column at a specific positionLocked→
- 4949. Create DataFrame from list of dictsLocked→
- 5050. Combine multiple aggregations with groupbyLocked→