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feat: add file existence and freshness check for F107 AP data download #70

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feat: add file existence and freshness check for F107 AP data download #70

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f378ce0
feat: add file existence and freshness check for F107 AP data download
Nov 21, 2024
ce1448f
fix(utils): improve readability of date comparison in _load_f107_ap_d…
Nov 21, 2024
45915f5
format: run linter
Nov 21, 2024
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11 changes: 9 additions & 2 deletions pymsis/utils.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
"""Utilities for obtaining input datasets."""

import datetime
import os
import urllib.request
import warnings
from io import BytesIO
Expand Down Expand Up @@ -49,8 +51,13 @@ def download_f107_ap() -> None:


def _load_f107_ap_data() -> dict[str, npt.NDArray]:
"""Load data from disk, if it isn't present go out and download it first."""
if not _F107_AP_PATH.exists():
# Check if the data file exists and is up-to-date
file_is_missing = not _F107_AP_PATH.exists()
file_is_stale = datetime.datetime.now() > datetime.datetime.fromtimestamp(
os.path.getmtime(_F107_AP_PATH)
) + datetime.timedelta(days=1)

if file_is_missing or file_is_stale:
download_f107_ap()

dtype = {
Expand Down