Python3 -拆分字符串并仅保留结尾部分

# 假设我们有一个日期时间字符串
datetime_str = "2023-04-05 14:30:00"

# 使用split()方法拆分字符串
parts = datetime_str.split(" ")
date_part = parts[0]
time_part = parts[1]

print("Date:", date_part)
print("Time:", time_part)

# 使用rsplit()方法拆分字符串
time_part_rsplit = datetime_str.rsplit(" ")[-1]

print("Time (using rsplit):", time_part_rsplit)

# 使用切片获取时间部分
time_part_slice = datetime_str[-8:]

print("Time (using slicing):", time_part_slice)

import re

# 假设字符串格式不一致
datetime_str_variants = ["2023-04-05 14:30:00", "05-04-2023 23:59", "2023/04/05 12:00"]

for dt in datetime_str_variants:
    # 使用正则表达式匹配时间部分
    match = re.search(r'(\d{2}:\d{2}:\d{2})$', dt)
    if match:
        print("Time:", match.group(1))
    else:
        print("No time found in:", dt)