hawc2.htc: do not lower string values when reading from HTC file

wetb/hawc2/ae_file.py

@@ -45,6 +45,8 @@ class AEFile(object):
     1.00000000000000000e+00   1.00000000000000006e-01   1.00000000000000000e+01     1
     """
 
+    cols = ['radius', 'chord', 'relative_thickness', 'setnr']
+
     def __init__(self, filename=None):
         self.ae_sets = {}
         if filename is not None:

wetb/hawc2/htc_contents.py

@@ -258,7 +258,7 @@ class HTCLine(HTCContents):
                                 ("", "\t" + self.comments)[bool(self.comments.strip())])
 
     def str_values(self):
-        return " ".join([str(v).lower() for v in self.values])
+        return " ".join([str(v) for v in self.values])
 
     def __getitem__(self, key):
         try:

wetb/hawc2/st_file.py

@@ -16,7 +16,7 @@ standard_library.install_aliases()
 import numpy as np
 
 
-stcols = "r m x_cg y_cg ri_x ri_y x_sh y_sh E G I_x I_y I_p k_x k_y A pitch x_e y_e"
+stc = "r m x_cg y_cg ri_x ri_y x_sh y_sh E G I_x I_y I_p k_x k_y A pitch x_e y_e"
 
 
 class StFile(object):
@@ -69,7 +69,16 @@ class StFile(object):
     >>> print (st.E(radius=36, mset=1, set=2))  # Same for stiff blade set
     8.722924514652648e+17
     """
-    def __init__(self, filename):
+
+    cols = stc.split()
+
+    def __init__(self, filename=None):
+
+        # in case the user wants to create a new non-existing st file
+        if filename is None:
+            self.main_data_sets = {}
+            return
+
         with open (filename) as fid:
             txt = fid.read()
 #         Some files starts with first set ("#1...") with out specifying number of sets
@@ -87,7 +96,7 @@ class StFile(object):
                 set_data_dict[set_nr] = np.array([set_lines[i].split() for i in range(1, no_rows + 1)], dtype=np.float)
             self.main_data_sets[mset_nr] = set_data_dict
 
-        for i, name in enumerate(stcols.split()):
+        for i, name in enumerate(self.cols):
             setattr(self, name, lambda radius=None, mset=1, set=1,
                     column=i: self._value(radius, column, mset, set))
 
@@ -111,8 +120,8 @@ class StFile(object):
         """Save all data defined in main_data_sets to st file.
         """
         colwidth = len(precision % 1)
-        sep = '='*colwidth*len(stcols) + '\n'
-        colhead = ''.join([k.center(colwidth) for k in stcols.split()]) + '\n'
+        sep = '='*colwidth*len(self.cols) + '\n'
+        colhead = ''.join([k.center(colwidth) for k in self.cols]) + '\n'
 
         nsets = len(self.main_data_sets)