(clxxxv) stackoverflow python report

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2019-07-06 15:20:53 GMT

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1. Efficient way to read 15 M lines csv files in python - [12/2]
2. Merging two data frames into a new one with unique items marked with 1 or 0 - [10/4]
3. Pandas merge and fillna - [9/4]
4. How to set the columns in pandas - [9/3]
5. How to slice a string input at certain unknown index? - [9/2]
6. What mechanism makes Python lambdas work without await keyword? - [8/1]
7. How to write cache function or equivalent in Python? - [7/6]
8. Conda error on update: `conda.core.link:_execute(637): An error occurred while installing package 'None'. AssertionError()` - [7/1]
9. Optimize the contrast/brightness (or histogram equalization) of a color photo of a sheet of paper with OpenCV - [6/2]
10. Board game: Find maximum green points with restricted red points - [6/1]