feat(mflistreader): read WEL Reductions from List File (#630)

* Read WEL Reductions from List File

Adds a method to the ListBudget class to read in data from the list file on automatic reductions to WEL extractions. This method supports both NWT and USG list files. Adds auto tests for both success and failure. I couldn't find any included data sets with reductions written to the LST, so I updated a USG data set to allow for the auto test.

* Removed Trailing Whitespace

Removed trailing whitespace id'd by codacy.

* Updated to work with python 2.7

Updated code to run with python 2.7.  Used autopep8 to formalize some formatting.

autotest/t011_test.py

@@ -6,6 +6,7 @@
 import os
 import flopy
 import numpy as np
+from nose.tools import raises
 
 
 def test_mflistfile():
@@ -55,6 +56,36 @@ def test_mflistfile():
 
     return
 
+def test_mflist_reducedpumping():
+    '''
+    test reading reduced pumping data from list file
+    '''
+    pth = os.path.join('..', 'examples', 'data', 'mfusg_test',
+                       '03B_conduit_unconfined', 'output')
+    list_file = os.path.join(pth, 'ex3B.lst')
+    mflist = flopy.utils.MfusgListBudget(list_file)
+    assert isinstance(mflist.get_reduced_pumping(), np.recarray)
+
+    return
+
+@raises(AssertionError) 
+def test_mflist_reducedpumping_fail():
+    '''
+    test failure for reading reduced pumping data from list file
+    '''
+    pth = os.path.join('..', 'examples', 'data', 'mfusg_test',
+                       '03A_conduit_unconfined', 'output')
+    list_file = os.path.join(pth, 'ex3A.lst')
+    # Catch before flopy to avoid masking file not found assert
+    if not os.path.isfile(list_file):
+        msg = '{} {}'.format(list_file, 'not found')
+        raise FileNotFoundError(msg)
+    mflist = flopy.utils.MfusgListBudget(list_file)
+    mflist.get_reduced_pumping()
+
+    return
 
 if __name__ == '__main__':
     test_mflistfile()
+    test_mflist_reducedpumping()
+    test_mflist_reducedpumping_fail()

examples/data/mfusg_test/03B_conduit_unconfined/ex3B.nam

@@ -11,4 +11,3 @@ DATA(BINARY) 30 ex3B.hds
 DATA(BINARY) 31 ex3B.ddn
 DATA(BINARY) 35 ex3B.cln.cbb
 DATA(BINARY) 36 ex3B.cln.hds
-DATA         55 ex3B.cln.afr

examples/data/mfusg_test/03B_conduit_unconfined/ex3B.wel

@@ -1,3 +1,3 @@
-         1        50 autoflowreduce iunitafr 55
+         1        50 autoflowreduce iunitafr 7
          0         0         1      Stress Period 1
          1   -62840.