Dictionary Comprehension
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# Type - 1 (SIMPLE LIST COMPREHENSION)
student_name = {'charles': 47, 'Nathan': 28, 'Adam': 19}
add_value = 92
new_dict = {item: value + add_value for (item, value) in student_name.items()}
print(new_dict)
# Type - 2 (LIST COMPREHENSION WITH OPERATION)
dic_key = ['m','u','t','z','x']
dic_val = [19,67,28,17,15]
new_dic = { a:b for (a,b) in zip(dic_key, dic_val)}
print (new_dic)
# Type - 3 (LIST COMPREHENSION WITH IF condition)
my_dict = {
'key_1': {'mouth', 'foot', 'tooth'},
'key_2': {'John', 'Georgia'},
'key_3': {'Smith', 'Jonas', 'Denver'}
}
dict_comp = { key : value for (key, value) in my_dict.items() if len(value) % 2 == 0}
print(dict_comp)
str = "a12bcd3efg456"
alpha_list = [i for i in str if i.isalpha()]
print(alpha_list)
alpha_str = "".join([i for i in str if i.isalpha()])
print(alpha_str)
# Type - 4 (LIST COMPREHENSION WITH IF-ELSE condition)
str = "a12bcd3efg456"
alpha_num_list = [i.upper() if i.isalpha() else int(i)**2 for i in str]
print(alpha_num_list)
# Type - 5 (LIST COMPREHENSION WITH NESTED IF conditions)
lst = [-2, 10, 5, 3, -1, 0, -15, 6, -30, 12]
positive_even_list = [ i for i in lst if i > 0 if i % 2 == 0 ]
print(positive_even_list)
# Type - 6 (LIST COMPREHENSION WITH NESTED loops)
nested_loop_list = [ i for i in range(5) for j in range(i) ]
print(nested_loop_list)
Python
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