Python3 operator in dictionary
description
Python dictionary in operator is used to determine whether the key exists in the dictionary, if the key is in the dictionary dict returns true, otherwise returns false.
grammar
has_key () method syntax:
key in dict
parameter
- key - you want to find in the dictionary key.
return value
If the key is in the dictionary returns true, otherwise it returns false.
Examples
The following example shows the in operator to use in the dictionary:
#!/usr/bin/python3 dict = {'Name': 'w3big', 'Age': 7} # 检测键 Age 是否存在 if 'Age' in dict: print("键 Age 存在") else : print("键 Age 不存在") # 检测键 Sex 是否存在 if 'Sex' in dict: print("键 Sex 存在") else : print("键 Sex 不存在")
The above example output is:
键 Age 存在 键 Sex 不存在