Remove delta alias for timedelta

docs/examples/documentation_MPI.ipynb

@@ -216,7 +216,7 @@
     "%pylab inline\n",
     "import os\n",
     "import time\n",
-    "from datetime import timedelta as delta\n",
+    "from datetime import timedelta\n",
     "from glob import glob\n",
     "\n",
     "import matplotlib.pyplot as plt\n",
@@ -248,11 +248,11 @@
     "        pclass=parcels.JITParticle,\n",
     "        lon=[0],\n",
     "        lat=[0],\n",
-    "        repeatdt=delta(hours=1),\n",
+    "        repeatdt=timedelta(hours=1),\n",
     "    )\n",
     "\n",
     "    tic = time.time()\n",
-    "    pset.execute(parcels.AdvectionRK4, dt=delta(hours=1))\n",
+    "    pset.execute(parcels.AdvectionRK4, dt=timedelta(hours=1))\n",
     "    func_time.append(time.time() - tic)\n",
     "    process = psutil.Process(os.getpid())\n",
     "    mem_B_used = process.memory_info().rss\n",
@@ -403,11 +403,11 @@
     "        pclass=parcels.JITParticle,\n",
     "        lon=[0],\n",
     "        lat=[0],\n",
-    "        repeatdt=delta(hours=1),\n",
+    "        repeatdt=timedelta(hours=1),\n",
     "    )\n",
     "\n",
     "    tic = time.time()\n",
-    "    pset.execute(AdvectionRK4_3D, dt=delta(hours=1))\n",
+    "    pset.execute(AdvectionRK4_3D, dt=timedelta(hours=1))\n",
     "    func_time3D.append(time.time() - tic)"
    ]
   },

docs/examples/documentation_indexing.ipynb

@@ -54,7 +54,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from datetime import timedelta as delta\n",
     "from glob import glob\n",
     "from os import path\n",
     "\n",

docs/examples/documentation_stuck_particles.ipynb

@@ -63,7 +63,7 @@
    "source": [
     "import math\n",
     "from copy import copy\n",
-    "from datetime import timedelta as delta\n",
+    "from datetime import timedelta\n",
     "from glob import glob\n",
     "\n",
     "import cmocean\n",
@@ -487,10 +487,13 @@
     "\n",
     "kernels = pset.Kernel(parcels.AdvectionRK4)\n",
     "\n",
-    "output_file = pset.ParticleFile(name=\"SMOC.zarr\", outputdt=delta(hours=1))\n",
+    "output_file = pset.ParticleFile(name=\"SMOC.zarr\", outputdt=timedelta(hours=1))\n",
     "\n",
     "pset.execute(\n",
-    "    kernels, runtime=delta(hours=119), dt=delta(minutes=12), output_file=output_file\n",
+    "    kernels,\n",
+    "    runtime=timedelta(hours=119),\n",
+    "    dt=timedelta(minutes=12),\n",
+    "    output_file=output_file,\n",
     ")"
    ]
   },
@@ -940,12 +943,12 @@
     "    fieldset=fieldset, pclass=parcels.JITParticle, lon=lon, lat=lat, time=time\n",
     ")\n",
     "\n",
-    "output_file = pset.ParticleFile(name=\"Cgrid-stuck.zarr\", outputdt=delta(hours=1))\n",
+    "output_file = pset.ParticleFile(name=\"Cgrid-stuck.zarr\", outputdt=timedelta(hours=1))\n",
     "\n",
     "pset.execute(\n",
     "    parcels.AdvectionRK4,\n",
-    "    runtime=delta(days=10),\n",
-    "    dt=delta(minutes=5),\n",
+    "    runtime=timedelta(days=10),\n",
+    "    dt=timedelta(minutes=5),\n",
     "    output_file=output_file,\n",
     ")"
    ]
@@ -1291,13 +1294,15 @@
     "    fieldset=fieldset, pclass=LandParticle, lon=lon, lat=lat, time=time\n",
     ")\n",
     "\n",
-    "output_file = pset.ParticleFile(name=\"Cgrid-diffusion.zarr\", outputdt=delta(hours=1))\n",
+    "output_file = pset.ParticleFile(\n",
+    "    name=\"Cgrid-diffusion.zarr\", outputdt=timedelta(hours=1)\n",
+    ")\n",
     "pset.execute(\n",
     "    pset.Kernel(parcels.AdvectionRK4)\n",
     "    + pset.Kernel(parcels.DiffusionUniformKh)\n",
     "    + pset.Kernel(Sample_land),\n",
-    "    runtime=delta(days=10),\n",
-    "    dt=delta(minutes=5),\n",
+    "    runtime=timedelta(days=10),\n",
+    "    dt=timedelta(minutes=5),\n",
     "    output_file=output_file,\n",
     ")"
    ]

docs/examples/documentation_unstuck_Agrid.ipynb

@@ -43,7 +43,7 @@
    "outputs": [],
    "source": [
     "from copy import copy\n",
-    "from datetime import timedelta as delta\n",
+    "from datetime import timedelta\n",
     "\n",
     "import cmocean\n",
     "import matplotlib.gridspec as gridspec\n",
@@ -882,8 +882,8 @@
     "lons, lats = np.meshgrid(lon, lat)\n",
     "time = np.zeros(lons.size)\n",
     "\n",
-    "runtime = delta(hours=100)\n",
-    "dt = delta(minutes=10)"
+    "runtime = timedelta(hours=100)\n",
+    "dt = timedelta(minutes=10)"
    ]
   },
   {
@@ -907,7 +907,7 @@
     "\n",
     "kernels = parcels.AdvectionRK4\n",
     "\n",
-    "output_file = pset.ParticleFile(name=\"SMOC.zarr\", outputdt=delta(hours=1))\n",
+    "output_file = pset.ParticleFile(name=\"SMOC.zarr\", outputdt=timedelta(hours=1))\n",
     "\n",
     "pset.execute(kernels, runtime=runtime, dt=dt, output_file=output_file)"
    ]
@@ -1000,7 +1000,7 @@
     "\n",
     "kernels = [displace, parcels.AdvectionRK4, set_displacement]\n",
     "\n",
-    "output_file = pset.ParticleFile(name=\"SMOC-disp.zarr\", outputdt=delta(hours=1))\n",
+    "output_file = pset.ParticleFile(name=\"SMOC-disp.zarr\", outputdt=timedelta(hours=1))\n",
     "\n",
     "pset.execute(kernels, runtime=runtime, dt=dt, output_file=output_file)"
    ]
@@ -1513,7 +1513,9 @@
     "\n",
     "kernels = pset.Kernel(parcels.AdvectionRK4)\n",
     "\n",
-    "output_file = pset.ParticleFile(name=\"SMOC_partialslip.zarr\", outputdt=delta(hours=1))\n",
+    "output_file = pset.ParticleFile(\n",
+    "    name=\"SMOC_partialslip.zarr\", outputdt=timedelta(hours=1)\n",
+    ")\n",
     "\n",
     "pset.execute(kernels, runtime=runtime, dt=dt, output_file=output_file)"
    ]
@@ -1557,7 +1559,7 @@
     "\n",
     "kernels = pset.Kernel(parcels.AdvectionRK4)\n",
     "\n",
-    "output_file = pset.ParticleFile(name=\"SMOC_freeslip.zarr\", outputdt=delta(hours=1))\n",
+    "output_file = pset.ParticleFile(name=\"SMOC_freeslip.zarr\", outputdt=timedelta(hours=1))\n",
     "\n",
     "pset.execute(kernels, runtime=runtime, dt=dt, output_file=output_file)"
    ]

docs/examples/example_brownian.py

@@ -1,4 +1,4 @@
-from datetime import timedelta as delta
+from datetime import timedelta
 
 import numpy as np
 import pytest
@@ -32,14 +32,14 @@ def test_brownian_example(mode, mesh, npart=3000):
     # Set random seed
     parcels.ParcelsRandom.seed(123456)
 
-    runtime = delta(days=1)
+    runtime = timedelta(days=1)
 
     parcels.ParcelsRandom.seed(1234)
     pset = parcels.ParticleSet(
         fieldset=fieldset, pclass=ptype[mode], lon=np.zeros(npart), lat=np.zeros(npart)
     )
     pset.execute(
-        pset.Kernel(parcels.DiffusionUniformKh), runtime=runtime, dt=delta(hours=1)
+        pset.Kernel(parcels.DiffusionUniformKh), runtime=runtime, dt=timedelta(hours=1)
     )
 
     expected_std_x = np.sqrt(2 * kh_zonal * runtime.total_seconds())

docs/examples/example_dask_chunk_OCMs.py

@@ -1,5 +1,5 @@
 import math
-from datetime import timedelta as delta
+from datetime import timedelta
 from glob import glob
 
 import dask
@@ -29,7 +29,7 @@ def periodicBC(particle, fieldSet, time):
 
     pset = parcels.ParticleSet.from_list(fieldset, ptype[mode], lon=lonp, lat=latp)
     kernels = pset.Kernel(parcels.AdvectionRK4) + periodicBC
-    pset.execute(kernels, runtime=delta(days=4), dt=delta(hours=6))
+    pset.execute(kernels, runtime=timedelta(days=4), dt=timedelta(hours=6))
     return pset
 
 
@@ -205,7 +205,9 @@ def test_globcurrent_2D(mode, chunk_mode):
     )
     try:
         pset = parcels.ParticleSet(fieldset, pclass=ptype[mode], lon=25, lat=-35)
-        pset.execute(parcels.AdvectionRK4, runtime=delta(days=1), dt=delta(minutes=5))
+        pset.execute(
+            parcels.AdvectionRK4, runtime=timedelta(days=1), dt=timedelta(minutes=5)
+        )
     except DaskChunkingError:
         # we removed the failsafe, so now if all chunksize dimensions are incorrect, there is nothing left to chunk,
         # which raises an error saying so. This is the expected behaviour
@@ -261,7 +263,7 @@ def test_pop(mode, chunk_mode):
     lonp = 70.0 * np.ones(npart)
     latp = [i for i in -45.0 + (-0.25 + np.random.rand(npart) * 2.0 * 0.25)]
     pset = parcels.ParticleSet.from_list(fieldset, ptype[mode], lon=lonp, lat=latp)
-    pset.execute(parcels.AdvectionRK4, runtime=delta(days=90), dt=delta(days=2))
+    pset.execute(parcels.AdvectionRK4, runtime=timedelta(days=90), dt=timedelta(days=2))
     # POP sample file dimensions: k=21, j=60, i=60
     assert len(fieldset.U.grid.load_chunk) == len(fieldset.V.grid.load_chunk)
     assert len(fieldset.U.grid.load_chunk) == len(fieldset.W.grid.load_chunk)
@@ -364,7 +366,9 @@ def test_swash(mode, chunk_mode):
         fieldset, ptype[mode], lon=lonp, lat=latp, depth=depthp
     )
     pset.execute(
-        parcels.AdvectionRK4, runtime=delta(seconds=0.2), dt=delta(seconds=0.005)
+        parcels.AdvectionRK4,
+        runtime=timedelta(seconds=0.2),
+        dt=timedelta(seconds=0.005),
     )
     # SWASH sample file dimensions: t=1, z=7, z_u=6, y=21, x=51
     if chunk_mode not in [
@@ -442,7 +446,9 @@ def test_ofam_3D(mode, chunk_mode):
     )
 
     pset = parcels.ParticleSet(fieldset, pclass=ptype[mode], lon=180, lat=10, depth=2.5)
-    pset.execute(parcels.AdvectionRK4, runtime=delta(days=10), dt=delta(minutes=5))
+    pset.execute(
+        parcels.AdvectionRK4, runtime=timedelta(days=10), dt=timedelta(minutes=5)
+    )
     # OFAM sample file dimensions: time=UNLIMITED, st_ocean=1, st_edges_ocean=52, lat=601, lon=2001
     assert len(fieldset.U.grid.load_chunk) == len(fieldset.V.grid.load_chunk)
     if chunk_mode is False:
@@ -535,7 +541,9 @@ def test_mitgcm(mode, chunk_mode, using_add_field):
     pset = parcels.ParticleSet.from_list(
         fieldset=fieldset, pclass=ptype[mode], lon=5e5, lat=5e5
     )
-    pset.execute(parcels.AdvectionRK4, runtime=delta(days=1), dt=delta(minutes=5))
+    pset.execute(
+        parcels.AdvectionRK4, runtime=timedelta(days=1), dt=timedelta(minutes=5)
+    )
     # MITgcm sample file dimensions: time=10, XG=400, YG=200
     if chunk_mode != "specific_different":
         assert len(fieldset.U.grid.load_chunk) == len(fieldset.V.grid.load_chunk)
@@ -744,7 +752,9 @@ def test_diff_entry_chunksize_correction_globcurrent(mode):
         filenames, variables, dimensions, chunksize=chs
     )
     pset = parcels.ParticleSet(fieldset, pclass=ptype[mode], lon=25, lat=-35)
-    pset.execute(parcels.AdvectionRK4, runtime=delta(days=1), dt=delta(minutes=5))
+    pset.execute(
+        parcels.AdvectionRK4, runtime=timedelta(days=1), dt=timedelta(minutes=5)
+    )
     # GlobCurrent sample file dimensions: time=UNLIMITED, lat=41, lon=81
     npart_U = 1
     npart_U = [npart_U * k for k in fieldset.U.nchunks[1:]]

docs/examples/example_decaying_moving_eddy.py

@@ -1,4 +1,4 @@
-from datetime import timedelta as delta
+from datetime import timedelta
 
 import numpy as np
 import pytest
@@ -10,8 +10,10 @@
 # Define some constants.
 u_g = 0.04  # Geostrophic current
 u_0 = 0.3  # Initial speed in x dirrection. v_0 = 0
-gamma = 1.0 / delta(days=2.89).total_seconds()  # Dissipitave effects due to viscousity.
-gamma_g = 1.0 / delta(days=28.9).total_seconds()
+gamma = (
+    1.0 / timedelta(days=2.89).total_seconds()
+)  # Dissipitave effects due to viscousity.
+gamma_g = 1.0 / timedelta(days=28.9).total_seconds()
 f = 1.0e-4  # Coriolis parameter.
 start_lon = [10000.0]  # Define the start longitude and latitude for the particle.
 start_lat = [10000.0]
@@ -75,9 +77,9 @@ def decaying_moving_example(
         fieldset, pclass=ptype[mode], lon=start_lon, lat=start_lat
     )
 
-    dt = delta(minutes=5)
-    runtime = delta(days=2)
-    outputdt = delta(hours=1)
+    dt = timedelta(minutes=5)
+    runtime = timedelta(days=2)
+    outputdt = timedelta(hours=1)
 
     pset.execute(
         method,