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import re
from typing import Optional
import math
def format(minutes: int):
if minutes >= 60 * 24:
return '' + format_decimal(minutes / 60 / 24) + 'd'
elif minutes >= 60:
return '' + format_decimal(minutes / 60) + 'h'
elif minutes > 0:
return '' + str(minutes) + 'm'
else:
return ''
def format_decimal(d: float) -> str:
return '{0:.2g}'.format(d)
def parse(duration: str) -> Optional[int]:
duration = duration.strip()
if duration:
result = re.match('^(\d+)(\.(\d+))?([mhd])$', duration.strip())
if result:
n = int(result.group(1))
if result.group(3):
d = int(result.group(3)) * pow(10, -1 * len(result.group(3)))
else:
d = 0
num = n + d
unit = result.group(4)
if unit == 'm':
return math.floor(num)
elif unit == 'h':
return math.floor(num * 60)
elif unit == 'd':
return math.floor(num * 60 * 24)
else:
return None
else:
return 0
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