dictionary find key python code example

Example 1: check if dict key exists python

d = {"key1": 10, "key2": 23}

if "key1" in d:
    print("this will execute")

if "nonexistent key" in d:
    print("this will not")

Example 2: how to know if a key is in a dictionary python

dict = {"key1": 1, "key2": 2}

if "key1" in dict:

Example 3: how to get key of a particular value in dictionary python using index

mydict = {'george': 16, 'amber': 19}
print(list(mydict.keys())[list(mydict.values()).index(16)])  # Prints george

Example 4: find key by value python

print(list(d.keys())[list(d.values()).index(990)])