metodos str

Microsoft Windows [Versión 10.0.19042.1348]
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C:\Users\Usuario>python
Python 3.10.0 (tags/v3.10.0:b494f59, Oct  4 2021, 19:00:18) [MSC v.1929 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> s = "Hola a todos"
>>> s[0]
'H'
>>> s[0] = "h"
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'str' object does not support item assignment
>>> s[:]
'Hola a todos'
>>> s[1:]
'ola a todos'
>>> s[1:-1]
'ola a todo'
>>> s[1:5]
'ola '
>>> lista = [1,2,3,4,5,6,7,8,9,10]
>>> lista[::2]
[1, 3, 5, 7, 9]
>>> lista[1::2]
[2, 4, 6, 8, 10]
>>> lista[2::3]
[3, 6, 9]
>>> lista[2:-1:3]
[3, 6, 9]
>>> s
'Hola a todos'
>>> s[1:-1]
'ola a todo'
>>> s[1:-1:2]
'oaatd'
>>> s.startswith("H")
True
>>> s
'Hola a todos'
>>> s.startswith("Hol")
True
>>> s.endswith("Hol")
False
>>> s.endswith("dos")
True
>>> s.endswith("todos")
True
>>> "a to" in s
True
>>> fila = "\tHola a todos \n"
>>> fila
'\tHola a todos \n'
>>> print(fila)
        Hola a todos

>>> fila.strip()
'Hola a todos'
>>> fila = "       Hola a todos "
>>> fila.strip()
'Hola a todos'
>>> fila = "\tHola a todos \n"
>>> fila.rstrip()
'\tHola a todos'
>>> fila.lstrip()
'Hola a todos \n'
>>> s
'Hola a todos'
>>> s.find("a")
3
>>> s.index("a")
3
>>> s.find("x")
-1
>>> s.index("x")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: substring not found
>>> s.find("la")
2
>>> s.find("a")
3
>>> s.rfind("a")
5
>>> s.rindex("a")
5
>>> s.replace("Hola","Chau")
'Chau a todos'
>>> s
'Hola a todos'
>>> s = s.replace("Hola","Chau")
>>> s
'Chau a todos'
>>> s.replace("o","x")
'Chau a txdxs'
>>> s.replace(" ","")
'Chauatodos'
>>> s.replace("a","")
'Chu  todos'
>>> s
'Chau a todos'
>>> s.lower()
'chau a todos'
>>> s.upper()
'CHAU A TODOS'
>>> s.swapcase()
'cHAU A TODOS'
>>> s.casefold()
'chau a todos'
>>> correo = "tatuss@ciudad.com.ar"
>>> correo.split("@")
['tatuss', 'ciudad.com.ar']
>>> nombre, server = correo.split("@")
>>> nombre
'tatuss'
>>> server
'ciudad.com.ar'
>>> nombres = "Juan,Ale,Tito,Ana,Lucio"
>>> nombres = nombres.split(",")
>>> nombres
['Juan', 'Ale', 'Tito', 'Ana', 'Lucio']
>>> lista = "root 1 2.5 1.0 /usr/bin/firefox"
>>> usuario, pid, cpu, mem, proceso = lista.split(" ")
>>> usuario
'root'
>>> pid
'1'
>>> cpu
'2.5'
>>> mem
'1.0'
>>> proceso
'/usr/bin/firefox'
>>> correo.split("@")
['tatuss', 'ciudad.com.ar']
>>> correo.partition("@")
('tatuss', '@', 'ciudad.com.ar')
>>> "root 1 2.5 1.0 /usr/bin/firefox".split(" ")
['root', '1', '2.5', '1.0', '/usr/bin/firefox']
>>> "root 1 2.5 1.0 /usr/bin/firefox".partition(" ")
('root', ' ', '1 2.5 1.0 /usr/bin/firefox')
>>> "root 1 2.5 1.0 /usr/bin/firefox".rpartition(" ")
('root 1 2.5 1.0', ' ', '/usr/bin/firefox')
>>> "root 1 2.5 1.0 /usr/bin/firefox".rpartition(" ")[-1]
'/usr/bin/firefox'
>>> "root 1 2.5 1.0 /usr/bin/firefox".partition(" ")[0]
'root'
>>> usuario, pid, cpu, mem, proceso = lista.split(" ")
>>> usuario
'root'
>>> " ".join([usuario,pid,cpu,mem,proceso])
'root 1 2.5 1.0 /usr/bin/firefox'
>>> nombre = "juan"
>>> server = "gmail.com"
>>> email = "@".join([nombre,server])
>>> email
'juan@gmail.com'
>>> nombres = ["juan","tito","ana"]
>>> server
'gmail.com'
>>> emails = []
>>> for nombe in nombres:
... for nombe in nombres:
KeyboardInterrupt
>>> for nombre in nombres:
...     emails.append("@".join([nombre,server]))
...
>>> emails
['juan@gmail.com', 'tito@gmail.com', 'ana@gmail.com']
>>> "34jkk!".isnumeric()
False
>>> "34jkk!".isascii()
True
>>> "34jkk!".isdigit()
False
>>> "34jkk!".alnum()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'str' object has no attribute 'alnum'. Did you mean: 'isalnum'?
>>> "34jkk!".isalnum()
False
>>> "34jkk!".isalpha()
False
>>> "234d".isdigit()
False
>>> "234d".isnumeric()
False
>>> "234d".isdecimal()
False
>>> "234.23".isdecimal()
False
>>> "234.23".isdigit()
False
>>> "234.23".isnumeric()
False
>>> "{:.2f}".format(23.58556)
'23.59'
>>> "{:.2f}".format(1,233,230.58556)
'1.00'
>>> "{:^10}".format(nombre)
'   ana    '
>>> "{:<10}".format(nombre)
'ana       '
>>> "{:>10}".format(nombre)
'       ana'
>>> "{:e}".format(1254648648987498789789)
'1.254649e+21'
>>> "{:E}".format(1254648648987498789789)
'1.254649E+21'
>>>
>>> s = "\t\nHola"
>>> print(s)

Hola
>>> s = "\t\nHola    "
>>> print(s)

Hola
>>> print(repr(s))
'\t\nHola    '