tDt (time delta toolkit) — a Python library for counting elapsed time in flexible, exact units.

Think of it as a universal stopwatch: from milliseconds to millennia, tDt gives you consistent tick counts without worrying about calendars or floating-point drift.

Time in most software is messy:

• Datetime APIs give you inconsistent results across months, leap years, daylight savings.
• Floating-point math introduces rounding errors.
• Simulations need exact, repeatable tick counts.

tDt fixes this with:

• Deterministic results: same input, same output — no surprises.
• Raw totals in all units: years, weeks, days, seconds, down to nanoseconds.
• Human-readable breakdowns: quickly see years + months + days.
• Simple API: two functions cover 95% of use cases.

pip install time-delta-t

from datetime import datetime
from tdt import count_ticks

start = datetime(2000, 1, 1)
end = datetime(2020, 1, 1)

print(count_ticks(start, end, "days"))   # → 7305
print(count_ticks(start, end, "weeks"))  # → 1043
print(count_ticks(start, end, "seconds"))# → 631152000

from datetime import datetime
from tdt import breakdown_all

start = datetime(2000, 1, 1)
end = datetime(2002, 2, 15)

print(breakdown_all(start, end))

Output:

{
  "millennia": 0,
  "centuries": 0,
  "decades": 0,
  "years": 2.12,
  "months": 25.5,
  "weeks": 111,
  "days": 780,
  "hours": 18720,
  "minutes": 1123200,
  "seconds": 67392000,
  "milliseconds": 67392000000,
  "microseconds": 67392000000000,
  "nanoseconds": 67392000000000000
}

from datetime import datetime
from tdt import pretty_breakdown

start = datetime(2000, 1, 1)
end = datetime(2002, 2, 15)

print(pretty_breakdown(start, end))
# → "2 years, 1 month, 14 days"

• Simulation & modeling

  • Drive tick-based engines with exact elapsed cycles.
  • e.g., count pump rotations, wire oscillations, planetary orbits.

• Robotics & IoT

  • Synchronize devices using tick counts instead of fuzzy floating time.

• Data processing

  • Express spans in whatever unit makes sense (seconds, days, months).

• Frontend/UI

  • Show users “time since install” or “lifespan remaining” in clean units.

• Add support for custom tick rates (e.g. 3600 ticks/hour = RPM).
• Integrations with physics/material models.
• Optional Rust/C++ backend for high-performance batch use.

Apache 2.0 © Dr. Ippy