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

d = {"apples": 1, "banannas": 4}
# Preferably use .keys() when searching for a key
if "apples" in d.keys():
  print(d["apples"])

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."

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

dict = {"key1": 1, "key2": 2}
if "key1" in dict:
 	print dict["key1]
>> 1

# Check if key exists
if session.get("key") == None:
	# Do something if it doesnt exist
else:
	# Do something else if it does exist

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