String_format_in_python.md

String format in python

In Python 3 everything is object and a string is of type str

s = ''
type(s)

We can acess a string in your index

"python"[0] # 'p'
"python"[1] # 'y'
"python"[2] # 't'
"python"[3] # 'h'
"python"[4] # 'o'
"python"[5] # 'n'

But we cannot change its value by assigning a value through the index.

word = "foo"
word[1] = "r"
# TypeError: 'str' object does not support item assignment

String é um objeto iterável.

for letter in "python":
    print letter

>>
"""
p
y
t
h
o
n
"""

Searching the string

"b" in "abc"     # True
"d" in "abc"     # False
"d" not in "abc" # True
"b" not in "abc" # False

Common String Methods

Len() method Show string length

s = "foo"
len(s)
# 3

upper and lowe

Upper() method Caps Lock.

"foo".upper() # FOO

lower() method Lowercase.

"FOO".lower() # foo

Convert to strin

str() method Converts to string

num = 123
type(num)      # <class 'int'>
type(str(num)) # <class 'str'>