python search dictionary for key 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: search in dict python

dictionary = { "key1" : 1, "name" : "Jordan", "age" : 21 }
for key in dictionary.keys():
    print("the key is {} and the value is {}".format(key, dictionary[key]))
    # or print("the key is",key,"and the value is",dictionary[key])
# OUTPOUT
# the key is key1 and the value is 1
# the key is name and the value is Jordan
# the key is age and the value is 21

Example 3: 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 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."

Example 5: find a key in a dictionary python

# How to find a key / check if a key is in a dict

# Easiest way
fruits = {'apple': 2, 'pear': 5, 'strawberry': 3}

if 'apple' in fruits:
	print("Key found!")
else:
  	print("Key not found!")