#pandas — Public Fediverse posts

In #Python #Pandas 3.1, reading CSV is multi-threaded, using up to 6 by default.

You can change it temporarily with mode.max_threads:

with pd.option_context('mode.max_threads', 10):
df = pd.read_csv('bigfile.csv')

Note: More threads aren't always faster!

Want to set an option in #Python #Pandas, but just temporarily? You can use option_context:

with pd.option_context('display.precision', 2):
print(s/3)

Within the "with" block, the display precision is 2. But outside -- before or after -- it is the default.

There are tons of config options in #Python #Pandas. Set them with pd.set_option:

pd.set_option('display.precision', 2)

Now floats in a series or data frame will have 2 digits after the decimal.

Retrieve the value with "get_option":

pd.get_option('display.precision')