n = int(input('Enter number of products : '))
prod = {}
for i in range(n):
ProductName = input('Enter product name : ')
ProductPrice = int(input('Enter its price : '))
prod[ProductName] = ProductPrice
print(prod) #prod = {'prod1': 100, 'prod2': 200, 'prod3': 300}
ProductName = input('enter price')
print(ProductName)
for ProductName, prod[ProductPrice] in prod:
if prod[ProductName] < ProductName:
print(ProductName)
When I enter 200 in ProductName, I want to print a prod1 that has a value of 100 less than 200, but I get an error. I ask for your help me.
Traceback (most recent call last):
File "C: Grade 2 File/Construction Plant Introduction/#11.Dictionaries_Exercise/#2.py", line 28, in <module>
for ProductName, prod[ProductPrice] in prod:
ValueError: too many values to unpack (expected 2)
dictionary returns a key in for loop.
If you want to use both key and value at the same time, use it as below.
d = {'a': 1, 'b': 2, 'c': 3}
for k in d:
print(k) # 'a', 'b', 'c'
for k, v in d.items():
print((k, v)) # ('a', 1), ('b', 2), ('c', 3)
prod= {'prod1': 100, 'prod2': 200, 'prod3': 300}
_input = 200
for key in prod: #
if prod[key] < _input:
print(key)
In #, prod has the dictionary key value prod1, prod2, prod3 so it cannot be unpacked with two.
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