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- # Copyright (c) 2010-2024 openpyxl
- from datetime import datetime
- from math import isnan, isinf
- import sys
- VER = sys.version_info
- from .numbers import NUMERIC_TYPES
- def safe_string(value):
- """Safely and consistently format numeric values"""
- if isinstance(value, NUMERIC_TYPES):
- if isnan(value) or isinf(value):
- value = ""
- else:
- value = "%.16g" % value
- elif value is None:
- value = "none"
- elif isinstance(value, datetime):
- value = value.isoformat()
- elif not isinstance(value, str):
- value = str(value)
- return value
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