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Update datetime_helpers.py #127

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Update datetime_helpers.py #127

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55 changes: 28 additions & 27 deletions src/pytimetk/utils/datetime_helpers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -144,35 +144,36 @@ def parse_freq_str(freq_str):
return quantity, unit

def freq_to_dateoffset(freq_str):
# Adjusted regex to account for potential absence of numeric part
unit_mapping = {
'D' : 'days',
'H' : 'hours',
'T' : 'minutes',
'min': 'minutes',
'S' : 'seconds',
'L' : 'milliseconds',
'U' : 'microseconds',
'N' : 'nanoseconds',
'Y' : 'years',
'A' : 'years',
'AS' : 'years',
'YS' : 'years',
'W' : 'weeks',
'Q' : 'months',
'QS' : 'months',
'M' : 'months',
'MS' : 'months',
}

quantity, unit = parse_freq_str(freq_str)

# Assume quantity of 1 if it's not explicitly provided
quantity = int(quantity) if quantity else 1

if unit == 'D': # Days
return pd.DateOffset(days=quantity)
elif unit == 'H': # Hours
return pd.DateOffset(hours=quantity)
elif unit == 'T' or unit == 'min': # Minutes
return pd.DateOffset(minutes=quantity)
elif unit == 'S': # Seconds
return pd.DateOffset(seconds=quantity)
elif unit == 'L': # Milliseconds
return pd.DateOffset(milliseconds=quantity)
elif unit == 'U': # Microseconds
return pd.DateOffset(microseconds=quantity)
elif unit == 'N': # Nanoseconds
return pd.DateOffset(nanoseconds=quantity)
elif unit in ['Y', 'A', 'AS', 'YS']: # Years
return pd.DateOffset(years=quantity)
elif unit == 'W': # Weeks
return pd.DateOffset(weeks=quantity)
elif unit in ['Q', 'QS']: # Quarters (approximated as 3*months)
return pd.DateOffset(months=quantity*3)
elif unit in ['M', 'MS']: # Months (approximated as 30.44 days)
return pd.DateOffset(months=quantity)
# ... add other units if needed

if unit in unit_mapping:
if unit_mapping[unit] == 'years':
return pd.DateOffset(years=quantity)
elif unit_mapping[unit] == 'months':
return pd.DateOffset(months=quantity)
else:
return pd.DateOffset(**{unit_mapping[unit]: quantity})
else:
raise ValueError(f"Unsupported frequency unit: {unit}")

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