how to check if a key value pair exists in a dictionary 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: python check if key exists

# You can use 'in' on a dictionary to check if a key exists
d = {"key1": 10, "key2": 23}
"key1" in d
# Output:
# True

Example 3: check if dict key contains specific key and value

if (key, value) in d.items():
	print("yes")

Example 4: python dictionary get value if key exists

val = dict.get(key , defVal)  # defVal is a default value if key does not exist