如何使用 UliEngineering 在 Python 中检查 datetime 是否为每月第一天

import numpy as np
from UliEngineering.Utils.Date import *

# 检查单个日期
print(f"Is 2024-01-01 first of month? {is_first_day_of_month('2024-01-01')}")
print(f"Is 2024-01-15 first of month? {is_first_day_of_month('2024-01-15')}")

# 检查 NumPy datetime64 数组
dates = np.array(['2024-01-01', '2024-01-15', '2024-02-01', '2024-03-15'], dtype='datetime64[D]')
result = is_first_day_of_month(dates)
print(f"\nFirst of month check: {result}")

Is 2024-01-01 first of month? True
Is 2024-01-15 first of month? False

First of month check: [ True False  True False]