

In [3]:

    
print('Hello world!')









    



Hello world!

Variable



In [4]:

    
my_var = 1
my_var









    Out[4]:





1

List



In [7]:

    
my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9]



In [10]:

    
my_list[0]









    Out[10]:





1



In [11]:

    
my_string = "Hello world"
my_string[0]









    Out[11]:





'H'



In [12]:

    
"HeLlO WoRlD".lower()









    Out[12]:





'hello world'



In [15]:

    
"    HeLlO WoRlD    ".strip()









    Out[15]:





'HeLlO WoRlD'



In [16]:

    
"hello world".split(" ")









    Out[16]:





['hello', 'world']



In [17]:

    
'; '.join(['hello', 'world'])









    Out[17]:





'hello; world'

Dictionary



In [18]:

    
capital_cities = {'Poland': 'Warsaw', 'Belarus': 'Minsk', 'Czech': 'Prague'}
capital_cities['Poland']









    Out[18]:





'Warsaw'

Conditions



In [21]:

    
country = input("What country are you looking for?")

if country in capital_cities:
    print('We know a caplital of {0}: "{1}"'.format(country, capital_cities[country]) )
else:
    input_var = input("Please help me, what is the capital of " + country + ": ")
    capital_cities[country] = input_var.strip()









    



What country are you looking for?USA
We know a caplital of USA: "Washington"



In [23]:

    
capital_cities









    Out[23]:





{'Belarus': 'Minsk',
 'Czech': 'Prague',
 'Poland': 'Warsaw',
 'USA': 'Washington'}

Loop - for



In [27]:

    
output_list = []

for x in range(10):
    output_list.append(x) #append elemnt into list
    
output_list









    Out[27]:





[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]



In [28]:

    
def doubled_fun(value):
    return value * 2

output_list = []
for x in range(10):
    output_list.append( doubled_fun(x) )
    
output_list









    Out[28]:





[0, 2, 4, 6, 8, 10, 12, 14, 16, 18]

Mapping



In [29]:

    
my_list = range(10)
list(my_list)









    Out[29]:





[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]



In [31]:

    
def doubled_fun(value):
    return value * 2
    
list( map(doubled_fun, my_list) )









    Out[31]:





[0, 2, 4, 6, 8, 10, 12, 14, 16, 18]

Lambda - anonymous function



In [32]:

    
list( map(lambda x: x*2, my_list) )









    Out[32]:





[0, 2, 4, 6, 8, 10, 12, 14, 16, 18]

List Comprehension



In [33]:

    
[x for x in range(10)]









    Out[33]:





[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]



In [34]:

    
[x*2 for x in range(10)]









    Out[34]:





[0, 2, 4, 6, 8, 10, 12, 14, 16, 18]



In [35]:

    
[x*2 for x in range(10) if x % 2 == 0]









    Out[35]:





[0, 4, 8, 12, 16]



In [ ]: