swap rows and columns when printing for consitency

Author: betaBison

gnss_lib_py/parsers/navdata.py

@@ -6,6 +6,7 @@
 __date__ = "03 Nov 2021"
 
 import os
+import re
 import copy
 
 import numpy as np
@@ -664,6 +665,10 @@ def __str__(self):
         str_out = str(self.pandas_df())
         str_out = str_out.replace("DataFrame","NavData")
         str_out = str_out.replace("Columns","Rows")
+        # swap rows and columns when printing for NavData consistency
+        str_out = re.sub(r"(.*)\[(\d+)\srows\sx\s(\d+)\scolumns\](.*)",
+                         r'\g<1>[\g<3> rows x \g<2> columns]\g<4>',
+                         str_out)
         return str_out
 
     def __len__(self):

tests/parsers/test_navdata.py

@@ -1667,6 +1667,14 @@ def test_str_navdata(df_simple, df_only_header):
     df_str = df_str.replace("Columns","Rows")
     assert navdata_str==df_str
 
+    # test DataFrame with a single row of data
+    df_long = pd.DataFrame(np.zeros((200,4)),
+                                    columns=["A","B","C","D"])
+    navdata = NavData(pandas_df=df_long)
+    assert str(navdata) == str(df_long).replace("[200 rows x 4 columns]",
+                                                "[4 rows x 200 columns]")
+
+
 def test_in_rows_single(data):
     """Test the in_rows function.