check if value in dictionary keys 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: python check if value exists in any key
>>> d = {'1': 'one', '3': 'three', '2': 'two', '5': 'five', '4': 'four'}
>>> 'one' in d.values()
True
Example 4: python how to check if a dictionary key exists
if word in data:
return data[word]
else:
return "The word doesn't exist. Please double check it."