30 Highest-Voted Python Questions on Stack Overflow

In this article, I am compiling the highest-voted Python-related questions on StackOverflow.

Let's check out how deeply you know Python programming.

1. What does the “yield” keyword do? Asked by: Alex. S.

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2. What does if name == “main”: do? Asked by: Devoted

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3. Does Python have a ternary conditional operator? Asked by: community wiki

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4. What are metaclasses in Python? Asked by: e-satis

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5. How do I check whether a file exists without exceptions? Asked by: spence91

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6. How do I merge two dictionaries in a single expression (taking union of dictionaries)? Asked by: Carl Meyer

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7. How to execute a program or call a system command? Asked by: freshWoWer

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8. How can I safely create a nested directory in Python? Asked by: Parand

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9. Accessing the index in 'for' loops? Asked by: Parand

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10. https://stackoverflow.com/questions/952914/how-to-make-a-flat-list-out-of-a-list-of-lists Asked by: Emma

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11. https://stackoverflow.com/questions/136097/difference-between-staticmethod-and-classmethod Asked by: Daryl Spitzer

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12. Understanding slice notation Asked by: Simon

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13. Finding the index of an item in a list Asked by: Eugene M

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14. Does Python have a string 'contains' substring method? Asked by: Blankman

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15. Iterating over dictionaries using 'for' loops Asked by: TopChef

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16. How do I list all files of a directory? Asked by: duhhunjonn

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17. Using global variables in a function Asked by: user46646

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18. How do I sort a dictionary by value? Asked by: Gern Blanston

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19. How to get the current time in Python Asked by: user46646

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20. Catch multiple exceptions in one line (except block) Asked by: inspectorG4dget

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21. How do I check if a list is empty? Asked by: Ray

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22. What is the difference between Python's list methods append and extend? Asked by: Claudiu

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23. What is the difference between str and repr? Asked by: Casebash

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24. How can I add new keys to a dictionary? Asked by: lfaraone

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25. How do I concatenate two lists in Python? Asked by: y2k

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26. How can a file be copied? Asked by: Matt

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27. Convert bytes to a string Asked by: Tomas Sedovic

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28. How can I make a time delay in Python? Asked by: user46646

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29. How to make function decorators and chain them together? Asked by: Imran

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30. How do I pass a variable by reference? Asked by: David Sykes

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