35、Python中操作系统服务相关模块详解

Python中操作系统服务相关模块详解

1. 时区定义与日期时间解析

1.1 时区定义

在Python中，我们可以自定义时区。以下是一个基本的时区定义示例：

# Variables that must be defined
# TZOFFSET   - Timezone offset in hours from UTC. For
#              example, US/CST is -6 hours
# DSTNAME    - Name of timezone when DST is in effect
# STDNAME    - Name of timezone when DST not in effect
class SomeZone(datetime.tzinfo):
    def utcoffset(self, dt):
        return datetime.timedelta(hours=TZOFFSET) + self.dst(dt)

    def dst(self, dt):
        # is_dst() is a function you must implement to see
        # whether DST is in effect according to local timezone rules.
        if is_dst(dt):
            return datetime.timedelta(hours=1)
        else:
            return datetime.timedelta