#python convert a dict to list or a list to dict or a slice a dict or sort a dict by key or value without import#convert dict to list or list to dict or slice a dict#1. convert dict to list
temp =[]# not required as [] is mentioned below
s ={'b':3,'a':2,'c':2,'d':1,'e':1}#our dict remember
temp =[[k,v]for k,v in s.items()]# temp is now listprint(temp)#[['b', 3], ['a', 2], ['c', 2], ['d', 1], ['e', 1]]#2. list to dict || pass a list like below
a_dict ={}# not required since we have {} in below
a_dict ={ v[0]:v[1]for k,v inenumerate(temp)}# OR || a_dict = { v[0]:v[1] for k,v in enumerate([k,v]for k,v in s.items())}print(a_dict)#{'b': 3, 'a': 2, 'c': 2, 'd': 1, 'e': 1}#3. Slice a dict is as simple slice as slicing a list#see below at temp[0:3] to slice dict to first 4 elements (0 to 3)
a_dict ={ v[0]:v[1]for k,v inenumerate(temp[0:3])}print(a_dict)#{'b': 3, 'a': 2, 'c': 2}# OR Also like doing this ([[k,v]for k,v in s.items()][0:3])#a_dict = { v[0]:v[1] for k,v in enumerate([[k,v]for k,v in s.items()][0:3])}print(a_dict)#{'b': 3, 'a': 2, 'c': 2}#Sort a dict #Reverse True for desc and False for asc#4. Sort a dict by key || s = {'b': 3, 'a': 2, 'c': 2, 'd': 1, 'e': 1}
a_dict =dict(sorted(s.items(),key=lambda x:x[0],reverse =False))print(a_dict )# {'a': 2, 'b': 3, 'c': 2, 'd': 1, 'e': 1}#Sort a dict by value || put 1 in x:x[1]
a_dict =dict(sorted(s.items(),key=lambda x:x[1],reverse =False))#{'d': 1, 'e': 1, 'a': 2, 'c': 2, 'b': 3}#5. Sort dict with import operatorimport operator as op#change itemgetter to 0|1 for key|value
a_dict =dict(sorted(s.items(),key=op.itemgetter(0), reverse =False))print(a_dict)#{'a': 2, 'b': 3, 'c': 2, 'd': 1, 'e': 1}#refer to #python convert a dict to list or a list to dict or a slice a dict or sort a dict by key or value without import#convert dict to list or list to dict or slice a dict#1. convert dict to list
temp =[]# not required as [] is mentioned below
s ={'b':3,'a':2,'c':2,'d':1,'e':1}#our dict remember
temp =[[k,v]for k,v in s.items()]# temp is now listprint(temp)#[['b', 3], ['a', 2], ['c', 2], ['d', 1], ['e', 1]]#2. list to dict || pass a list like below
a_dict ={}# not required since we have {} in below
a_dict ={ v[0]:v[1]for k,v inenumerate(temp)}# OR || a_dict = { v[0]:v[1] for k,v in enumerate([k,v]for k,v in s.items())}print(a_dict)#{'b': 3, 'a': 2, 'c': 2, 'd': 1, 'e': 1}#3. Slice a dict is as simple slice as slicing a list#see below at temp[0:3] to slice dict to first 4 elements (0 to 3)
a_dict ={ v[0]:v[1]for k,v inenumerate(temp[0:3])}print(a_dict)#{'b': 3, 'a': 2, 'c': 2}# OR Also like doing this ([[k,v]for k,v in s.items()][0:3])#a_dict = { v[0]:v[1] for k,v in enumerate([[k,v]for k,v in s.items()][0:3])}print(a_dict)#{'b': 3, 'a': 2, 'c': 2}#Sort a dict #Reverse True for desc and False for asc#4. Sort a dict by key || s = {'b': 3, 'a': 2, 'c': 2, 'd': 1, 'e': 1}
a_dict =dict(sorted(s.items(),key=lambda x:x[0],reverse =False))print(a_dict )# {'a': 2, 'b': 3, 'c': 2, 'd': 1, 'e': 1}#Sort a dict by value || put 1 in x:x[1]
a_dict =dict(sorted(s.items(),key=lambda x:x[1],reverse =False))#{'d': 1, 'e': 1, 'a': 2, 'c': 2, 'b': 3}#5. Sort dict with import operatorimport operator as op#change itemgetter to 0|1 for key|value
a_dict =dict(sorted(s.items(),key=op.itemgetter(0), reverse =False))print(a_dict)#{'a': 2, 'b': 3, 'c': 2, 'd': 1, 'e': 1}#refer to https://ideone.com/uufYuP#dn't forget to upvote
# This is our example dictionary
petAges ={"Cat":4,"Dog":2,"Fish":1,"Parrot":5}# This will be our list, epmty for now
petAgesList =[]# Search through the dictionary and find all the keys and valuesfor key, value in petAges.items():
petAgesList.append([key, value])# Add the key and value to the listprint(petAgesList)# Print the now-filled list# Output: [['Cat', 4], ['Dog', 2], ['Fish', 1], ['Parrot', 5]]
#This is to convert two lists into a dictionary in Python#given ListA is key#given ListB is value
listA =['itemA','itemB']
listB =['priceA','priceB']dict(zip(listA, listB))# Returns {'itemA':'priceA','itemB':'priceB'}