Answers for "python dictionary"

python dictionary

#Creating dictionaries
dict1 = {'color': 'blue', 'shape': 'square', 'volume':40}
dict2 = {'color': 'red', 'edges': 4, 'perimeter':15}

#Creating new pairs and updating old ones
dict1['area'] = 25 #{'color': 'blue', 'shape': 'square', 'volume': 40, 'area': 25}
dict2['perimeter'] = 20 #{'color': 'red', 'edges': 4, 'perimeter': 20}

#Accessing values through keys
print(dict1['shape'])

#You can also use get, which doesn't cause an exception when the key is not found
dict1.get('false_key') #returns None
dict1.get('false_key', "key not found") #returns the custom message that you wrote 

#Deleting pairs
dict1.pop('volume')

#Merging two dictionaries
dict1.update(dict2) #if a key exists in both, it takes the value of the second dict
dict1 #{'color': 'red', 'shape': 'square', 'area': 25, 'edges': 4, 'perimeter': 20}

#Getting only the values, keys or both (can be used in loops)
dict1.values() #dict_values(['red', 'square', 25, 4, 20])
dict1.keys() #dict_keys(['color', 'shape', 'area', 'edges', 'perimeter'])
dict1.items() 
#dict_items([('color', 'red'), ('shape', 'square'), ('area', 25), ('edges', 4), ('perimeter', 20)])

dictionary in python

d = {'key1':'value1','key2':'value2'}
print(d) # to print full dictionary
l=d.keys
print(l)   # to print keys
b=d.values
print(b)#to print values in dictionary

dictionary in python

# Dictionaries in Python

ages = {"John": 43, "Bob": 24, "Ruth": 76} # Marked by { at beginning and a } at end

# ^^^ Has sets of keys and values, like the 'John' and 43 set. These two values must be seperated by a colon

# ^^^ Sets of values seperated by commas.

python dictionary

#Creating dictionaries
dict1 = {'color': 'blue', 'shape': 'square', 'volume':40}
dict2 = {'color': 'red', 'edges': 4, 'perimeter':15}

dictionary in python

#a dictionary
dict = {
  "key": "value",
  "other_key": "value"
}

#get a value from the dictionary using the key
print(dict["key"])

#you can also get a value from the dictionary using a normal index:
print(dict[1])