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from datetime import datetime, timedelta, tzinfo
# identity function
identity = lambda x: x
def human_datetime(time: datetime) -> str:
return "{:%Y-%m-%d %H:%M:%S}".format(time)
def human_timedelta(delta: timedelta) -> str:
if delta.days == 0:
days = ""
elif delta.days == 1:
days = "1 day, "
else:
days = f"{delta.days} days, "
hours = delta.seconds // 3600
minutes = (delta.seconds - (hours * 3600)) // 60
return days + f"{hours:0>2}:{minutes:0>2}" # zero-pad to two digits
def group_by_key(data: list, key: str) -> dict:
"""Groups a list of dicts by the value of their `key` into a dict of lists of dicts."""
keys = set([item[key] for item in data])
# initiate a dict with `keys` as keys and [] as values
groups = dict.fromkeys(keys, [])
for k in keys:
groups[k] = [item for item in data if item[key] == k]
return groups
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