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iterable as a chain

Project description

ChIter - iterable as a chain

Requirements

  • Python 3.7+

Installation

pip install chiter

Documentation

Coming soon

Why?

  • Chains do not require saving the intermediate state in temporary variables
  • Look more readable

Examples

It is necessary to get the sum of all numbers from the following sequence:"23,45,67\n45,56,55\n\n45,a,5\n-45,56,0"

first way

from itertools import chain


data = "23,45,67\n45,56,55\n\n45,a,5\n-45,56,0"

chunks = (chunk.split(',') for chunk in data.split())
flat_data = chain.from_iterable(chunks)
items = (int(item) for item in flat_data if not item.isalpha())
result = sum(items)

assert result == 352

second way

from itertools import chain


data = "23,45,67\n45,56,55\n\n45,a,5\n-45,56,0"

result = sum((
    int(item)
    for item in chain.from_iterable(map(lambda c: c.split(','), data.split()))
    if not item.isalpha()
))
assert result == 352

chiter way

from chiter import ChIter as I


data = "23,45,67\n45,56,55\n\n45,a,5\n-45,56,0"

result = (I(data.split())
          .map(lambda x: x.split(','))
          .flat()
          .filterfalse(str.isalpha)
          .map(int)
          .sum())

assert result == 352

Related Libraries

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