PYTHON

python dictionary get key by value

d = {'key1': 'aaa', 'key2': 'aaa', 'key3': 'bbb'}

keys = [k for k, v in d.items() if v == 'aaa']
print(keys)
# ['key1', 'key2']

keys = [k for k, v in d.items() if v == 'bbb']
print(keys)
# ['key3']

keys = [k for k, v in d.items() if v == 'xxx']
print(keys)
# []

get value and key from dict python

myDict = {
    "message": "Hello Grepper!"
}
for key, value in myDict.items():
    print(key)      #Output: message
    print(value)    #Output: Hello Grepper!

get key from value dictionary py

dict = {1: 'a', 2: 'b'}
value = 'a'
key = [x for x in dict.keys() if dict[x] == value][0]

get key from value in python dict

list(prio.keys())[list(prio.values()).index(x)] 

get a value using a dictionary key in python

print(d.get('key5', 'NO KEY'))
# NO KEY

print(d.get('key5', 100))
# 100