The best 20 python questions on StackOverflow 2017

1. Python's. (dot number) What is the syntax?

Answer Address: Https://stackoverflow.com/questions/43487811/what-is-python-dot-dot-notation-syntax

2, why in the Python3 x**4.0 than x**4 run faster?

Answer Address: https://stackoverflow.com/questions/42355194/why-is-x4-0-faster-than-x4-in-python-3

3. Given a number with a length of 1 million (such as π), the write code calculates all successive three digits and requires that the successive three digits repeat at least once.

Answer Address: https://stackoverflow.com/questions/47581326/given-a-string-of-a-million-numbers-return-all-repeating-3-digit-numbers

4, why in Python expression 0, 0 = = (0, false) The result is (0, false)

Answer Address: Https://stackoverflow.com/questions/44864156/why-in-python-0-0-0-0-equals-0-false

5. Does python optimize a variable that is used only as a return value?

Answer Address: Https://stackoverflow.com/questions/43390869/does-python-optimize-away-a-variable-thats-only-used-as-a-return-value

6, accelerate the Python3 in the million-level regular replacement.

Answer Address: https://stackoverflow.com/questions/42742810/speed-up-millions-of-regex-replacements-in-python-3

7, two sets are set, why are the elements in the collection missing?

Answer Address: Https://stackoverflow.com/questions/44489658/union-of-2-sets-does-not-contain-all-items

8, in the For loop, i = i + 1 and i + = 1 What is the difference?

Answer Address: Https://stackoverflow.com/questions/41446833/what-is-the-difference-between-i-i-1-and-i-1-in-a-for-loop

9. Why is it a lot slower to copy a shuffle list?

Answer Address: Https://stackoverflow.com/questions/42107442/why-is-copying-a-shuffled-list-much-slower

10. Why are tuples consuming less memory than lists?

Answer Address: https://stackoverflow.com/questions/46664007/why-do-tuples-take-less-space-in-memory-than-lists

11. In Python, what happens when you assign a value to another variable with one variable?

Answer Address: https://stackoverflow.com/questions/45053461/ What-happens-when-you-assign-the-value-of-one-variable-to-another-variable-in-py

12, why this Python string attempt to convert to an integer failed, the even size has changed.

Answer Address: https://stackoverflow.com/questions/47062184/ Why-does-the-size-of-this-python-string-change-on-a-failed-int-conversion

13. How can I tell if a list is divisible by another list?

Answer Address: Https://stackoverflow.com/questions/45906747/is-a-list-potentially-divisible-by-another

14, understand the statement *x, = list.

Answer Address: Https://stackoverflow.com/questions/43190992/understanding-x-lst

15. Why can I use any target expression in a for loop?

Answer Address: Https://stackoverflow.com/questions/44317993/why-are-arbitrary-target-expressions-allowed-in-for-loops

16, better Python for loop mode.

Answer Address: Https://stackoverflow.com/questions/46996315/a-better-way-for-a-python-for-loop

17. The strange way to use Python and operator.

Answer Address: Https://stackoverflow.com/questions/47007680/strange-use-of-pythons-and-operator

18. Increase the maximum number of logical layers in Python code.

Answer Address: https://stackoverflow.com/questions/44972719/ why-does-python-have-a-limit-on-the-number-of-static-blocks-that-can-be-nested

19, how to let a dataframe around the center of rotation?

Answer Address: Https://stackoverflow.com/questions/47152691/how-to-pivot-a-dataframe

20. What's the use of assigning a variable to yourself?

Answer Address: https://stackoverflow.com/questions/43853407/re-assigning-a-name-to-itself

The best 20 python questions on StackOverflow 2017