(TIL) Pandas: Use dtype to speed up reading with read_csv
By default, pandas will infer the data types of the columns when reading in a csv file. To speed up this read, you can specify the data types using the dtype...
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(TIL) Pandas: Use chunksize to iterate through files with read_Csv
Suppose you wish to iterate through a (potentially very large) file lazily rather than reading the entire file into memory.
(TIL) Pandas: Extract days from a timedelta64
To extract the integer value of days from a numpy.timedelta64 in pandas, use dt.days to obtain the days attribute as integers.
(TIL) Pandas: Inverse of boolean
In pandas, you can use the tilde (~) to flip bool values: