The second development [python] python basic data types

Basic data types

• digital 

　　1, useless printing up double quotes, supports + - * /% (wherein the fourth power,% ** 4 4 modulo power multiplier 4, i.e. take the remainder, / division, the result is the quotient //)

　　2, in python3, no matter how much numbers are of type int

　　3, the string is converted to a digital

Conversion and viewing digital type conversion type
a = "123"
print(type(a),a)

b = int(a)
print(type(b),b)

Default without base, int 10 is converted into a binary, plus Base = 16 is converted into a hexadecimal num decimal.
num = "a"
v = int(num,base=16)
print(v)

This figure is expressed in binary with several
age = 4
r = age.bit_length()
print(r)

• String

     (Quotation marks printed up), support the addition (character stitching), multiplication, str  

      10 substantially magic string (join, split, find, strip, upper, lower, len, replace, for loop, index, slices)