Python Variable Type

The first is assignment, various types

#coding =utf-8#!user/bin/pythonimport sysstring = ' Hello ' integer = 1000floater = 1.00print Integerprint Floatersys.stdout.write (string + ' \ n ')

Python has five standard data types:

• Numbers (digital)
• String (String)
• List (lists)
• Tuple (tuple)
• Dictionary (dictionary)

Defining variables and Unregistering variables

#coding =utf-8#!user/bin/pythonimport sysvar1 = 1var2 = 2var3 = 3print var1print var2print var3del var1print var1print var2 Print Var3

　

Python supports four different numeric types:

• int (signed integral type)
• Long (longer integer [can also represent octal and hexadecimal])
• Float (float type)
• Complex (plural)

Python string

#coding =utf-8#!user/bin/pythonimport sysstring = ' ilove ' Print string[1]print string[2]print string[3]print string[4] Print String[1:5]

Python list

#coding =utf-8#!user/bin/pythonarray = [' 111 ', 11, ' Hello ', 22,33,10.2]print  array[0]print  array[2]

　　

Python tuples

A tuple is another data type, similar to a list.

The tuple is identified with a "()". The inner elements are separated by commas. However, an element cannot be assigned two times, which is equivalent to a read-only list

#coding =utf-8#!user/bin/pythonyuanhzu = (' xxx ', ' world ', 10,2.02) print  yuanhzu[0]print  yuanhzu[1]yuanhzu[1] = ' Hello ' Print yuanhzu[1]

　

Python Meta Dictionary

The Dictionary (dictionary) is the most flexible built-in data structure type in Python, except for lists. A list is an ordered combination of objects, and a dictionary is a collection of unordered objects.

The difference between the two is that the elements in the dictionary are accessed by keys, not by offsets.

The dictionary is identified with "{}". A dictionary consists of an index (key) and a value corresponding to it.

#coding =utf-8#!user/bin/pythonarray = {}array[' key '] = ' name ' array[' value '] = ' Jack ' Print Arrayprint array.keys () print array[' key ']print array.values () arr  = {' One ': ' xx ', ' x ': ' yy '}print arr.values () print Arr.keys ()

　　

Python Data type conversions

#coding =utf-8#!user/bin/pythona = 1b = 2c = ' 222 ' Print  A + bprint int (c) + 22

　　

　

Python Variable Type