90 lines
3.1 KiB
Python
Executable File
90 lines
3.1 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Convert time between timezones."""
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import sys
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from datetime import datetime, timedelta
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from zoneinfo import ZoneInfo
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def convert_time(source_tz: str, time_str: str, target_tz: str) -> None:
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"""Convert time from source timezone to target timezone.
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Args:
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source_tz: Source IANA timezone name (e.g., 'America/New_York')
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time_str: Time to convert in 24-hour format (HH:MM)
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target_tz: Target IANA timezone name (e.g., 'Australia/Perth')
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"""
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try:
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# Parse timezone names
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source_timezone = ZoneInfo(source_tz)
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target_timezone = ZoneInfo(target_tz)
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# Parse time string
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try:
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parsed_time = datetime.strptime(time_str, "%H:%M").time()
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except ValueError:
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print(f"Error: Invalid time format '{time_str}'", file=sys.stderr)
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print("Expected format: HH:MM (24-hour, e.g., '14:30')", file=sys.stderr)
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sys.exit(1)
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# Create datetime for today in source timezone
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now = datetime.now(source_timezone)
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source_time = datetime(
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now.year,
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now.month,
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now.day,
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parsed_time.hour,
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parsed_time.minute,
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tzinfo=source_timezone,
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)
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# Convert to target timezone
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target_time = source_time.astimezone(target_timezone)
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# Calculate time difference
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source_offset = source_time.utcoffset() or timedelta()
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target_offset = target_time.utcoffset() or timedelta()
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hours_difference = (target_offset - source_offset).total_seconds() / 3600
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# Format time difference (handle fractional hours like Nepal's +5:45)
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if hours_difference.is_integer():
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time_diff_str = f"{hours_difference:+.1f}h"
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else:
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time_diff_str = f"{hours_difference:+.2f}".rstrip("0").rstrip(".") + "h"
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# Check DST status
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source_dst = source_time.dst() is not None and source_time.dst().total_seconds() != 0
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target_dst = target_time.dst() is not None and target_time.dst().total_seconds() != 0
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# Output formatted information
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print(f"Source: {source_tz} - {source_time.isoformat(timespec='seconds')} "
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f"({source_time.strftime('%A')}, DST: {'Yes' if source_dst else 'No'})")
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print(f"Target: {target_tz} - {target_time.isoformat(timespec='seconds')} "
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f"({target_time.strftime('%A')}, DST: {'Yes' if target_dst else 'No'})")
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print(f"Time difference: {time_diff_str}")
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except Exception as e:
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if "ZoneInfo" in str(type(e).__name__):
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print(f"Error: Invalid timezone", file=sys.stderr)
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else:
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print(f"Error: {str(e)}", file=sys.stderr)
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sys.exit(1)
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def main():
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if len(sys.argv) != 4:
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print("Usage: python convert_time.py <source_tz> <time> <target_tz>", file=sys.stderr)
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print("Example: python convert_time.py 'America/New_York' '14:30' 'Australia/Perth'",
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file=sys.stderr)
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sys.exit(1)
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source_tz = sys.argv[1]
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time_str = sys.argv[2]
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target_tz = sys.argv[3]
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convert_time(source_tz, time_str, target_tz)
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if __name__ == "__main__":
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main()
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