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--- python_dictionaries [2023/02/26 03:21] – [Convert a dictionary to a string] raju
+++ python_dictionaries [2023/08/02 19:41] (current) – [find key corresponding to a value] raju
@@ Line 6: / Line 6: @@
   * [[Convert a string to a dictionary]]
+==== find key corresponding to a value ====
+The following will find the first key corresponding to a given value
+<code>
+>>> d ={1:'A', 2:'B', 3:'A', 4:'B'}
+>>> key_list = list(d.keys())
+>>> val_list = list(d.values())
+>>> lookup_val = 'A'
+>>> position = val_list.index(lookup_val)
+>>> key_val = key_list[position]
+>>> print(key_val)
+</code>
+<code>
+>>> lookup_val = 'B'
+>>> position = val_list.index(lookup_val)
+>>> key_val = key_list[position]
+>>> print(key_val)
+</code>
+Sample use case:
+  * In https://github.com/KamarajuKusumanchi/notebooks/blob/master/finvizfinance/target_price.ipynb , I used the above technique to find the index corresponding to 'Target Price'.
 ==== initialize a dictionary ====
@@ Line 154: / Line 177: @@
 str
 </code>