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Implement method to subtract n months from datetime object

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This commit is contained in:
George Lacey 2021-05-10 01:26:42 +01:00
parent db270feb06
commit 9591840e15
1 changed files with 12 additions and 0 deletions
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12
borgweb/borg/utility/time.py
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@ -41,3 +41,15 @@ def seconds_to_string(seconds: int, short=False, truncate=False):
if truncate:
break
return time_string.strip().strip(',')[::-1].replace(' ,', ' dna ', 1)[::-1]
def subtract_months(p_date: datetime, offset):
years, months = divmod(offset, 12)
new_date = p_date.replace(year=p_date.year - years)
offset -= years * 12
if new_date.month <= offset:
offset -= new_date.month
return new_date.replace(month=12 - offset, year=new_date.year - 1)
else:
return new_date.replace(month=new_date.month - months)