Python Introduccion

Este notebook de jupyter te permite comprender los principios basicos de la sintaxis que utiliza Python

Por el momento el codigo no contiene ningun tipo de explicacion

Temas que se incluyen

Tipos de datos
- Numbers
- Strings
- Printing
- Lists
- Dictionaries
- Booleans
- Tuples
- Sets
Operadores comparativos
if,elif, else
for
while
range()
list
Funciones
lambda
map and filter
metodos

Tipos de datos

Numbers



In [6]:

    
1 + 1









    Out[6]:





2



In [7]:

    
1 * 3









    Out[7]:





3



In [8]:

    
1 / 2









    Out[8]:





0.5



In [9]:

    
2 ** 4









    Out[9]:





16



In [10]:

    
4 % 2









    Out[10]:





0



In [11]:

    
5 % 2









    Out[11]:





1



In [12]:

    
(2 + 3) * (5 + 5)









    Out[12]:





50

Asignar variables



In [1]:

    
# No pueden comenzar con numero o un caracter especial
name_of_var = 2



In [2]:

    
x = 2
y = 3



In [3]:

    
z = x + y



In [4]:

    
z









    Out[4]:





5

Strings



In [5]:

    
'single quotes'









    Out[5]:





'single quotes'



In [6]:

    
"double quotes"









    Out[6]:





'double quotes'



In [7]:

    
" wrap lot's of other quotes"









    Out[7]:





" wrap lot's of other quotes"

Print



In [8]:

    
x = 'hello'



In [9]:

    
x









    Out[9]:





'hello'



In [10]:

    
print(x)









    



hello



In [11]:

    
num = 12
name = 'Sam'



In [12]:

    
print('My number is: {one}, and my name is: {two}'.format(one=num,two=name))









    



My number is: 12, and my name is: Sam



In [13]:

    
print('My number is: {}, and my name is: {}'.format(num,name))









    



My number is: 12, and my name is: Sam

Lists



In [26]:

    
[1,2,3]









    Out[26]:





[1, 2, 3]



In [27]:

    
['hi',1,[1,2]]









    Out[27]:





['hi', 1, [1, 2]]



In [28]:

    
my_list = ['a','b','c']



In [29]:

    
my_list.append('d')



In [30]:

    
my_list









    Out[30]:





['a', 'b', 'c', 'd']



In [31]:

    
my_list[0]









    Out[31]:





'a'



In [32]:

    
my_list[1]









    Out[32]:





'b'



In [33]:

    
my_list[1:]









    Out[33]:





['b', 'c', 'd']



In [34]:

    
my_list[:1]









    Out[34]:





['a']



In [35]:

    
my_list[0] = 'NEW'



In [98]:

    
my_list









    Out[98]:





['NEW', 'b', 'c', 'd']



In [99]:

    
nest = [1,2,3,[4,5,['target']]]



In [100]:

    
nest[3]









    Out[100]:





[4, 5, ['target']]



In [101]:

    
nest[3][2]









    Out[101]:





['target']



In [102]:

    
nest[3][2][0]









    Out[102]:





'target'

Dictionaries



In [37]:

    
d = {'key1':'item1','key2':'item2'}



In [38]:

    
d









    Out[38]:





{'key1': 'item1', 'key2': 'item2'}



In [39]:

    
d['key1']









    Out[39]:





'item1'

Booleans



In [40]:

    
True









    Out[40]:





True



In [41]:

    
False









    Out[41]:





False

Tuples



In [42]:

    
t = (1,2,3)



In [43]:

    
t[0]









    Out[43]:





1



In [44]:

    
t[0] = 'NEW'









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-44-97e4e33b36c2> in <module>()
----> 1 t[0] = 'NEW'

TypeError: 'tuple' object does not support item assignment

Sets



In [45]:

    
{1,2,3}









    Out[45]:





{1, 2, 3}



In [46]:

    
{1,2,3,1,2,1,2,3,3,3,3,2,2,2,1,1,2}









    Out[46]:





{1, 2, 3}

Comparison Operators



In [47]:

    
1 > 2









    Out[47]:





False



In [48]:

    
1 < 2









    Out[48]:





True



In [49]:

    
1 >= 1









    Out[49]:





True



In [50]:

    
1 <= 4









    Out[50]:





True



In [51]:

    
1 == 1









    Out[51]:





True



In [52]:

    
'hi' == 'bye'









    Out[52]:





False

Operadores logicos



In [53]:

    
(1 > 2) and (2 < 3)









    Out[53]:





False



In [54]:

    
(1 > 2) or (2 < 3)









    Out[54]:





True



In [55]:

    
(1 == 2) or (2 == 3) or (4 == 4)









    Out[55]:





True

if,elif, else



In [56]:

    
if 1 < 2:
    print('Yep!')









    



Yep!



In [57]:

    
if 1 < 2:
    print('yep!')









    



yep!



In [58]:

    
if 1 < 2:
    print('first')
else:
    print('last')









    



first



In [59]:

    
if 1 > 2:
    print('first')
else:
    print('last')









    



last



In [60]:

    
if 1 == 2:
    print('first')
elif 3 == 3:
    print('middle')
else:
    print('Last')









    



middle

for



In [61]:

    
seq = [1,2,3,4,5]



In [62]:

    
for item in seq:
    print(item)



In [63]:

    
for item in seq:
    print('Yep')









    



Yep
Yep
Yep
Yep
Yep



In [64]:

    
for jelly in seq:
    print(jelly+jelly)

while



In [65]:

    
i = 1
while i < 5:
    print('i is: {}'.format(i))
    i = i+1









    



i is: 1
i is: 2
i is: 3
i is: 4

range()



In [66]:

    
range(5)









    Out[66]:





range(0, 5)



In [67]:

    
for i in range(5):
    print(i)



In [68]:

    
list(range(5))









    Out[68]:





[0, 1, 2, 3, 4]

list comprehension



In [69]:

    
x = [1,2,3,4]



In [70]:

    
out = []
for item in x:
    out.append(item**2)
print(out)









    



[1, 4, 9, 16]



In [71]:

    
[item**2 for item in x]









    Out[71]:





[1, 4, 9, 16]

Funciones



In [72]:

    
def my_func(param1='default'):
    """
    Docstring goes here.
    """
    print(param1)



In [73]:

    
my_func









    Out[73]:





<function __main__.my_func>



In [74]:

    
my_func()









    



default



In [75]:

    
my_func('new param')









    



new param



In [76]:

    
my_func(param1='new param')









    



new param



In [77]:

    
def square(x):
    return x**2



In [78]:

    
out = square(2)



In [79]:

    
print(out)

lambda



In [80]:

    
def times2(var):
    return var*2



In [81]:

    
times2(2)









    Out[81]:





4



In [82]:

    
lambda var: var*2









    Out[82]:





<function __main__.<lambda>>

map and filter



In [83]:

    
seq = [1,2,3,4,5]



In [84]:

    
map(times2,seq)









    Out[84]:





<map at 0x105316748>



In [85]:

    
list(map(times2,seq))









    Out[85]:





[2, 4, 6, 8, 10]



In [86]:

    
list(map(lambda var: var*2,seq))









    Out[86]:





[2, 4, 6, 8, 10]



In [87]:

    
filter(lambda item: item%2 == 0,seq)









    Out[87]:





<filter at 0x105316ac8>



In [88]:

    
list(filter(lambda item: item%2 == 0,seq))









    Out[88]:





[2, 4]

Metodos



In [111]:

    
st = 'hello my name is Sam'



In [112]:

    
st.lower()









    Out[112]:





'hello my name is sam'



In [113]:

    
st.upper()









    Out[113]:





'HELLO MY NAME IS SAM'



In [103]:

    
st.split()









    Out[103]:





['hello', 'my', 'name', 'is', 'Sam']



In [104]:

    
tweet = 'Go Sports! #Sports'



In [106]:

    
tweet.split('#')









    Out[106]:





['Go Sports! ', 'Sports']



In [107]:

    
tweet.split('#')[1]









    Out[107]:





'Sports'



In [92]:

    
d









    Out[92]:





{'key1': 'item1', 'key2': 'item2'}



In [93]:

    
d.keys()









    Out[93]:





dict_keys(['key2', 'key1'])



In [94]:

    
d.items()









    Out[94]:





dict_items([('key2', 'item2'), ('key1', 'item1')])



In [95]:

    
lst = [1,2,3]



In [96]:

    
lst.pop()









    Out[96]:





3



In [108]:

    
lst









    Out[108]:





[1, 2]



In [109]:

    
'x' in [1,2,3]









    Out[109]:





False



In [110]:

    
'x' in ['x','y','z']









    Out[110]:





True