在Python中，有没有更简单的方法从字符串中减去季度(3个月)？

pip install pandas

import pandas as pd

# 示例日期字符串
date_str = "2023-10-01"

# 将字符串转换为 pandas 的 Timestamp 对象
date = pd.to_datetime(date_str)

# 减去一个季度（3 个月）
new_date = date - pd.DateOffset(months=3)

# 将结果转换回字符串格式
new_date_str = new_date.strftime("%Y-%m-%d")

print("Original date:", date_str)
print("Date after subtracting a quarter:", new_date_str)

Original date: 2023-10-01
Date after subtracting a quarter: 2023-07-01

from datetime import datetime, timedelta
from dateutil.relativedelta import relativedelta

# 示例日期字符串
date_str = "2023-10-01"

# 将字符串转换为 datetime 对象
date = datetime.strptime(date_str, "%Y-%m-%d")

# 减去一个季度（3 个月）
new_date = date - relativedelta(months=3)

# 将结果转换回字符串格式
new_date_str = new_date.strftime("%Y-%m-%d")

print("Original date:", date_str)
print("Date after subtracting a quarter:", new_date_str)

pip install python-dateutil