adapt/stub some more examples (modflowpy#46)

docs/examples/list_example.py

@@ -0,0 +1,64 @@
+# # List input variables
+#
+# This example demonstrates how to work with list input variables.
+#
+# A list variable is a generic collection type, whose elements can
+# be scalars, records, or unions of such. A list with a consistent
+# (non-union) element type can be provided as a NumPy recarray or a
+# Pandas dataframe.
+
+from tempfile import TemporaryDirectory
+
+import flopy
+import numpy as np
+
+# set up where simulation workspace will be stored
+temp_dir = TemporaryDirectory()
+workspace = temp_dir.name
+name = "tutorial06_mf6_data"
+
+# create the Flopy simulation and tdis objects
+sim = flopy.mf6.MFSimulation(
+    sim_name=name, exe_name="mf6", version="mf6", sim_ws=workspace
+)
+tdis = flopy.mf6.modflow.mftdis.ModflowTdis(
+    sim,
+    pname="tdis",
+    time_units="DAYS",
+    nper=2,
+    perioddata=[(1.0, 1, 1.0), (1.0, 1, 1.0)],
+)
+# create the Flopy groundwater flow (gwf) model object
+model_nam_file = f"{name}.nam"
+gwf = flopy.mf6.ModflowGwf(sim, modelname=name, model_nam_file=model_nam_file)
+# create the flopy iterative model solver (ims) package object
+ims = flopy.mf6.modflow.mfims.ModflowIms(sim, pname="ims", complexity="SIMPLE")
+# create the discretization package
+bot = np.linspace(-50.0 / 3.0, -3.0, 3)
+delrow = delcol = 4.0
+dis = flopy.mf6.modflow.mfgwfdis.ModflowGwfdis(
+    gwf,
+    pname="dis",
+    nogrb=True,
+    nlay=3,
+    nrow=10,
+    ncol=10,
+    delr=delrow,
+    delc=delcol,
+    top=0.0,
+    botm=bot,
+)
+
+# Below we pass the CHD package's `stress_period_data` as a list.
+
+# build chd package
+stress_period_data = [((1, 8, 8), 100.0), ((1, 9, 9), 105.0)]
+chd = flopy.mf6.modflow.mfgwfchd.ModflowGwfchd(
+    gwf,
+    pname="chd",
+    maxbound=len(stress_period_data),
+    stress_period_data=stress_period_data,
+    save_flows=True,
+)
+
+# TODO: demo typed records

docs/examples/record_example.py

@@ -1,12 +1,90 @@
-# # Record variables
+# # Record and union variables
 #
-# This example demonstrates how to work with record input variables.
+# This example demonstrates how to work with record and union input
+# variables.
 #
 # A record variable is a product type. Record fields can be scalars,
 # other record variables, or unions of such.
 #
+# A union (keystring) variable is a sum type.
+#
 # MODFLOW 6 represents records as (possibly variadic) tuples. FloPy
 # supports both a low-level tuple interface for records, conforming
 # to MODFLOW 6, and a high-level, strongly-typed record interface.
+
+# package import
+from tempfile import TemporaryDirectory
+
+import flopy
+import numpy as np
+
+# set up where simulation workspace will be stored
+temp_dir = TemporaryDirectory()
+workspace = temp_dir.name
+name = "tutorial06_mf6_data"
+
+# create the Flopy simulation and tdis objects
+sim = flopy.mf6.MFSimulation(
+    sim_name=name, exe_name="mf6", version="mf6", sim_ws=workspace
+)
+tdis = flopy.mf6.modflow.mftdis.ModflowTdis(
+    sim,
+    pname="tdis",
+    time_units="DAYS",
+    nper=2,
+    perioddata=[(1.0, 1, 1.0), (1.0, 1, 1.0)],
+)
+# create the Flopy groundwater flow (gwf) model object
+model_nam_file = f"{name}.nam"
+gwf = flopy.mf6.ModflowGwf(sim, modelname=name, model_nam_file=model_nam_file)
+# create the flopy iterative model solver (ims) package object
+ims = flopy.mf6.modflow.mfims.ModflowIms(sim, pname="ims", complexity="SIMPLE")
+# create the discretization package
+bot = np.linspace(-50.0 / 3.0, -3.0, 3)
+delrow = delcol = 4.0
+dis = flopy.mf6.modflow.mfgwfdis.ModflowGwfdis(
+    gwf,
+    pname="dis",
+    nogrb=True,
+    nlay=3,
+    nrow=10,
+    ncol=10,
+    delr=delrow,
+    delc=delcol,
+    top=0.0,
+    botm=bot,
+)
+
+# ## Adding MODFLOW Package Data, Connection Data, and Option Lists
+#
+# MODFLOW Package data, connection data, and option lists are stored by FloPy
+# as numpy recarrays.  FloPy does accept numpy recarrays as input, but does
+# has other supported formats discussed below.
+#
+# MODFLOW option lists that only contain a single row or data can be either
+# specified by:
+#
+# 1. Specifying a string containing the entire line as it would be displayed
+#    in the package file (`rewet_record="REWET WETFCT 1.0 IWETIT 1 IHDWET 0"`)
+# 2. Specifying the data in a tuple within a list
+#    (`rewet_record=[("WETFCT", 1.0, "IWETIT", 1, "IHDWET", 0)]`)
 #
-# TODO flesh out
+# In the example below the npf package is created setting the `rewet_record`
+# option to a string of text as would be typed into the package file.
+
+npf = flopy.mf6.modflow.mfgwfnpf.ModflowGwfnpf(
+    gwf,
+    rewet_record="REWET WETFCT 1.0 IWETIT 1 IHDWET 0",
+    pname="npf",
+    icelltype=1,
+    k=1.0,
+    save_flows=True,
+    xt3doptions="xt3d rhs",
+)
+
+# `rewet_record` is then set using the npf package's `rewet_record` property.
+# This time 'rewet_record' is defined using a tuple within a list.
+
+npf.rewet_record = [("WETFCT", 1.1, "IWETIT", 0, "IHDWET", 1)]
+
+# TODO: typed API demo

docs/examples/transient_example.py

@@ -0,0 +1,81 @@
+# # Transient input variables
+
+# MODFLOW stress period data is stored by FloPy as a dictionary of numpy
+# recarrays, where each dictionary key is a zero-based stress period and each
+# dictionary value is a recarray containing the stress period data for that
+# stress period.  FloPy keeps this stress period data in a `MFTransientList`
+# object and this data type is referred to as a transient list.
+#
+# FloPy accepts stress period data as a dictionary of numpy recarrays, but also
+# supports replacing the recarrays with lists of tuples discussed above.
+# Stress period data spanning multiple stress periods must be specified as a
+# dictionary of lists where the dictionary key is the stress period expressed
+# as a zero-based integer.
+#
+# The example below creates `stress_period_data` for the wel package with the
+# first stress period containing a single well and the second stress period
+# empty.  When empty stress period data is entered FloPy writes an empty
+# stress period block to the package file.
+
+from tempfile import TemporaryDirectory
+
+import flopy
+import numpy as np
+
+# set up where simulation workspace will be stored
+temp_dir = TemporaryDirectory()
+workspace = temp_dir.name
+name = "tutorial06_mf6_data"
+
+# create the Flopy simulation and tdis objects
+sim = flopy.mf6.MFSimulation(
+    sim_name=name, exe_name="mf6", version="mf6", sim_ws=workspace
+)
+tdis = flopy.mf6.modflow.mftdis.ModflowTdis(
+    sim,
+    pname="tdis",
+    time_units="DAYS",
+    nper=2,
+    perioddata=[(1.0, 1, 1.0), (1.0, 1, 1.0)],
+)
+# create the Flopy groundwater flow (gwf) model object
+model_nam_file = f"{name}.nam"
+gwf = flopy.mf6.ModflowGwf(sim, modelname=name, model_nam_file=model_nam_file)
+# create the flopy iterative model solver (ims) package object
+ims = flopy.mf6.modflow.mfims.ModflowIms(sim, pname="ims", complexity="SIMPLE")
+# create the discretization package
+bot = np.linspace(-50.0 / 3.0, -3.0, 3)
+delrow = delcol = 4.0
+dis = flopy.mf6.modflow.mfgwfdis.ModflowGwfdis(
+    gwf,
+    pname="dis",
+    nogrb=True,
+    nlay=3,
+    nrow=10,
+    ncol=10,
+    delr=delrow,
+    delc=delcol,
+    top=0.0,
+    botm=bot,
+)
+
+# First we create wel package with stress_period_data dictionary
+# keys as zero-based integers so key "0" is stress period 1
+
+stress_period_data = {
+    0: [((2, 3, 1), -25.0)],  # stress period 1 well data
+    1: [],
+}  # stress period 2 well data is empty
+
+# Then, using the dictionary created above, we build the wel package.
+
+wel = flopy.mf6.ModflowGwfwel(
+    gwf,
+    print_input=True,
+    print_flows=True,
+    stress_period_data=stress_period_data,
+    save_flows=False,
+    pname="WEL-1",
+)
+
+# TODO typed API demo

docs/examples/input_data_model_example.py → docs/examples/variables_example.py

@@ -1,4 +1,4 @@
-# # Input data model
+# Input variables
 #
 # TODO: flesh this out, describe prospective plan for type hints,
 # determine whether we want to work directly with numpy or with
@@ -81,3 +81,5 @@
 # - While MODFLOW 6 typically formulates file path inputs as records with
 # 3 fields (identifying keyword, `filein`/`fileout`, and filename), FloPy
 # simply accepts `PathLike`.
+
+# TODO: demonstrate setting/accessing scalars in an options block