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from dateutil import parser
import json
IGNORE = object()
SET_NULL = object()
def parsedate(value, dayfirst=False, yearfirst=False, errors=None):
"""
Parse a date and convert it to ISO date format: yyyy-mm-dd
\b
- dayfirst=True: treat xx as the day in xx/yy/zz
- yearfirst=True: treat xx as the year in xx/yy/zz
- errors=r.IGNORE to ignore values that cannot be parsed
- errors=r.SET_NULL to set values that cannot be parsed to null
"""
try:
return (
parser.parse(value, dayfirst=dayfirst, yearfirst=yearfirst)
.date()
.isoformat()
)
except parser.ParserError:
if errors is IGNORE:
return value
elif errors is SET_NULL:
return None
else:
raise
def parsedatetime(value, dayfirst=False, yearfirst=False, errors=None):
"""
Parse a datetime and convert it to ISO datetime format: yyyy-mm-ddTHH:MM:SS
\b
- dayfirst=True: treat xx as the day in xx/yy/zz
- yearfirst=True: treat xx as the year in xx/yy/zz
- errors=r.IGNORE to ignore values that cannot be parsed
- errors=r.SET_NULL to set values that cannot be parsed to null
"""
try:
return parser.parse(value, dayfirst=dayfirst, yearfirst=yearfirst).isoformat()
except parser.ParserError:
if errors is IGNORE:
return value
elif errors is SET_NULL:
return None
else:
raise
def jsonsplit(value, delimiter=",", type=str):
"""
Convert a string like a,b,c into a JSON array ["a", "b", "c"]
"""
return json.dumps([type(s.strip()) for s in value.split(delimiter)])
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