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)] 

dict ;get a key of a value

myDict={"name":"PythonForBeginners","acronym":"PFB"}
print("Dictionary is:")
print(myDict)
dict_items=myDict.items()
print("Given value is:")
myValue="PFB"
print(myValue)
print("Associated Key is:")
for key,value in dict_items:
    if value==myValue:
        print(key)

get a value using a dictionary key in python

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

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

return key from value dictionary python

cars = {'ford': 10, 'opel': 5 }

def get_val(key):
    return cars[key]

ford = get_val('ford')
print(ford)