r26322 - /trunk/lib/periodic_table.py -- October 21, 2014 - 13:52

Author: bugman
Date: Tue Oct 21 13:52:10 2014
New Revision: 26322

URL: http://svn.gna.org/viewcvs/relax?rev=26322&view=rev
Log:
Created the Periodic_table.has_element() method for the lib.periodic_table 
module.

This is used to simply check if a given symbol exists as an atom in the 
periodic table.


Modified:
    trunk/lib/periodic_table.py

Modified: trunk/lib/periodic_table.py
URL: 
http://svn.gna.org/viewcvs/relax/trunk/lib/periodic_table.py?rev=26322&r1=26321&r2=26322&view=diff
==============================================================================
--- trunk/lib/periodic_table.py (original)
+++ trunk/lib/periodic_table.py Tue Oct 21 13:52:10 2014
@@ -295,6 +295,25 @@
         return isotope.gyromagnetic_ratio
 
 
+    def has_element(self, symbol=None):
+        """Check if the periodic table contains an atom for the give symbol.
+
+        @keyword symbol:    The atomic symbol.
+        @type symbol:       str
+        @return:            True if the symbol is in the periodic table, 
False otherwise.
+        @rtype:             bool
+        """
+
+        # Process the symbol.
+        symbol = process_symbol(symbol)
+
+        # Check.
+        if symbol in self:
+            return True
+        else:
+            return False
+
+
     def lookup_symbol(self, atomic_number=None):
         """Return the atomic symbol corresponding to the atomic number Z.