python check if key of dict exist code example

Example 1: check if is dictionary

isinstance(df, pd.DataFrame)
isinstance(df, dict)
isinstance(df, list)

Example 2: 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 3: python dictionary contains key

if key in dictionary:
  print(True)

Example 4: check dictionary has key python

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

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

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