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"""Utilities that might be useful elsewhere."""
from collections import namedtuple
ProgressIndicator = namedtuple(
"ProgressIndicator", ("filesize", "processedsize", "currentline", "percent"))
def make_progress_calculator(filesize: int):
"""
Returns a function that takes two arguments, `linenumber` and `linetext` and
return a `ProgressIndicator` object with the computed progress.
"""
processedsize = 0
def __calculator__(linenumber: int, linetext: str) -> ProgressIndicator:
nonlocal processedsize
processedsize = processedsize + len(linetext)
return ProgressIndicator(
filesize, processedsize, linenumber,
((processedsize/filesize) * 100))
return __calculator__
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