CODEWITHSUNDEEP
pythonperformanceinputio
user2597879
user2597879

Reputation: 97

What is the fastest way to do I/O in Python?

Like those programming challenges, right now I do the following:

For a single variable:

x = int(sys.stdin.readline())

for many variables

A, B, C = map(int,sys.stdin.readline().split())

Is this optimal or are there faster ways?

Upvotes: 2

Views: 3922

Answers (2)

hygull
hygull

Reputation: 8740

Python's sys library has 2 file objects stdin and stdout connected with STDIN and STOUT. stdin file object has readline() and readlines() methods & stdout file object has write() method. We can use these methods for fast I/O in Python.

visit here

Upvotes: 0

jterrace
jterrace

Reputation: 67063

If you have numpy available, the numpy loading functions are very fast. For example:

>>> import numpy
>>> s = '1\n2\n3\n4\n'
>>> data = numpy.fromstring(s, dtype=int, sep='\n')
>>> data
array([1, 2, 3, 4])

This example loads from a string, but you can also load directly from an open file using numpy.fromfile.

Upvotes: 1

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