Python dateutil库简化日期时间处理利器使用场景实践

pip install python-dateutil

from dateutil import parser, relativedelta

# 解析字符串为日期对象
date_str = "2023-11-15"
parsed_date = parser.parse(date_str)
print(f"Parsed Date: {parsed_date}")

# 计算相对日期
current_date = parsed_date
next_month = current_date + relativedelta.relativedelta(months=1)
print(f"Next Month: {next_month}")

from dateutil import parser

date_str = "2023-11-15"
parsed_date = parser.parse(date_str)
print(f"Parsed Date: {parsed_date}")

from dateutil import relativedelta

current_date = parsed_date
next_month = current_date + relativedelta.relativedelta(months=1)
print(f"Next Month: {next_month}")

from datetime import datetime
from dateutil import tz

# 创建带时区信息的日期时间对象
dt_with_tz = datetime(2023, 11, 15, tzinfo=tz.gettz("America/New_York"))
print(f"Date with Timezone: {dt_with_tz}")

from dateutil import parser

date_str = "2023-11-15 08:30:00"
parsed_date = parser.parse(date_str)
print(f"Parsed Date: {parsed_date}")

from dateutil import relativedelta

baseline_date = parser.parse("2023-01-01")
current_date = parser.parse("2023-11-15")

time_difference = relativedelta.relativedelta(current_date, baseline_date)
print(f"Time Difference: {time_difference}")

from datetime import datetime
from dateutil import tz

# 创建带时区信息的日期时间对象
dt_with_tz = datetime(2023, 11, 15, tzinfo=tz.gettz("America/New_York"))
print(f"Date with Timezone: {dt_with_tz}")

from datetime import datetime
from dateutil import relativedelta

event_time = datetime(2023, 11, 15, 10, 0, 0)
reminder_delta = relativedelta.relativedelta(hours=-2)

reminder_time = event_time + reminder_delta
print(f"Reminder Time: {reminder_time}")

from datetime import datetime
from dateutil import rrule

start_date = datetime(2023, 11, 15)
weekly_rule = rrule.rrule(rrule.WEEKLY, dtstart=start_date, count=5)

for occurrence in weekly_rule:
    print(f"Recurring Event: {occurrence}")

from datetime import datetime
from dateutil import easter

today = datetime.now()
if easter.is_easter(today.year, today.month, today.day):
    print("Today is Easter!")

from datetime import datetime

timestamp_string = "2023-11-15 12:30:45"
date_part = timestamp_string[:10]  # Only extract the date part
parsed_date = datetime.strptime(date_part, "%Y-%m-%d")

from datetime import datetime
from dateutil import tz

# Define time zones
tz_utc = tz.tzutc()
tz_local = tz.tzlocal()

# Parse a timestamp string in UTC
timestamp_string = "2023-11-15 12:30:45"
utc_time = datetime.strptime(timestamp_string, "%Y-%m-%d %H:%M:%S").replace(tzinfo=tz_utc)

# Convert to local time only when needed
local_time = utc_time.astimezone(tz_local)

from datetime import datetime

timestamp_strings = ["2023-11-15 12:30:45", "2023-11-16 14:45:30"]
parsed_dates = [datetime.strptime(ts[:10], "%Y-%m-%d") for ts in timestamp_strings]