[python] subsetting a Python DataFrame

Regarding some points mentioned in previous answers, and to improve readability:

No need for data.loc or query, but I do think it is a bit long.

The parentheses are also necessary, because of the precedence of the & operator vs. the comparison operators.

I like to write such expressions as follows - less brackets, faster to type, easier to read. Closer to R, too.

q_product = df.Product == p_id
q_start = df.Time > start_time
q_end = df.Time < end_time

df.loc[q_product & q_start & q_end, c('Time,Product')]

# c is just a convenience
c = lambda v: v.split(',') 

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