List Comprehensions and Lambdas

list_comps_and_lambdas.py

"""
Create a new list based upon whether or not the object in the list is a string or not (by utilizing isinstance - if we wanted to only find integers we'd change str to int). 
"""
# Lame
my_list = ['a', 'b', 'c', '1', 1, 2, 'd', 'e', '2']
new_list = []
for object in my_list:
    if isinstance(object, str):
        new_list.append(object)

# Awesome
my_list = = ['a', 'b', 'c', '1', 1, 2, 'd', 'e', '2']
new_list = [object for object in my_list if isinstance(object, str)]

"""
Here we determine whether or not a list has at least 1 object in it or not. If it is empty the result is True and if it isn't it returns False. Simple.
"""
# Lame
my_list = [] # an empty list
def is_empty(x):
    if len(a) < 1:
        return True
    else:
        return False
result = is_empty(my_list)

# Awesome
my_list = [] # an empty list
is_empty = lambda x: True if len(x) < 1 else False
result = is_empty(my_list)