bug fix reading sample sheet headers

methpype/files/sample_sheets.py

@@ -287,12 +287,13 @@ def read(self, sample_sheet_file):
                     LOGGING.info("Finished scanning sample_sheet; did not find header info.")
                 break
             raw_line = cur_line.decode()
-            if not raw_line:
+            if raw_line:
                 self.headers.append(raw_line)
             cur_line = sample_sheet_file.readline()
             rows_to_scan -= 1
         reset_file(sample_sheet_file)
 
+
         test_sheet = pd.read_csv(
             sample_sheet_file,
             header = None,  # this ensures row[0] included as data -- [this is for looking for the header]
@@ -316,7 +317,6 @@ def read(self, sample_sheet_file):
                 start_row = idx
                 break
             rows_to_scan -= 1
-            print(rows_to_scan)
         if start_row == None:
             raise ValueError("error - did not parse header right")