Example 1: how to get the key for a value in a dictionary in python
def get_key(val):
for key, value in my_dict.items():
if val == value:
return key
return "key doesn't exist"
my_dict ={"java":100, "python":112, "c":11}
print(get_key(100))
print(get_key(11))
Example 2: how to get key of a particular value in dictionary python using index
mydict = {'george': 16, 'amber': 19}
print(list(mydict.keys())[list(mydict.values()).index(16)])
Example 3: python get value from dictionary
dict = {'color': 'blue', 'shape': 'square', 'perimeter':20}
dict.get('shape')
dict.get('volume', 'The key was not found')
Example 4: python dictionary access value by key
datadict = [{'Name': 'John', 'Age': 38, 'City': 'Boston'},
{'Name': 'Sara', 'Age': 47, 'City': 'Charlotte'},
{'Name': 'Peter', 'Age': 63, 'City': 'London'},
{'Name': 'Cecilia', 'Age': 28, 'City': 'Memphis'}]
def getDictVal(listofdic, name, retrieve):
for item in listofdic:
if item.get('Name')==name:
return item.get(retrieve)
getDictVal(datadict, 'Sara', 'City')
df = pd.DataFrame({'Name': ['John', 'Sara','Peter','Cecilia'],
'Age': [38, 47,63,28],
'City':['Boston', 'Charlotte','London','Memphis']})
datadict = df.to_dict('records')
Example 5: find key by value python
print(list(d.keys())[list(d.values()).index(990)])