What types of variables do python have? and a summary of the variable types

What types of variables do python have? and a summary of the variable types
"Numeric" number:float, int, long, complex

"String": str Note that there is no string, where STR is the abbreviation of string.
How to create: Str () a= ' abcdef '
Method:
1, interception: a[head Subscript: Tail Subscript: Each step value] The default is: 1
2. Increase: A + a equals a*2
3. Merger: A + A
4, S.lower () #小写
5, S.upper () #大写
6, S.swapcase () #大小写互换
7, S.capitalize () #首字母大写
Reference Address: http://blog.sina.com.cn/s/blog_5dd2af0901012r96.html
"List":
How to create: List () a=[' A ', ' B ', ' C ']
Method:
1, interception: a[head Subscript: Tail Subscript: Each step value] The default is: 1
2. Increase: A + a equals a*2
3. Merger: A + A
4. Append () method to add to trailer
5. Add the Insert () method to the specified location
6. Pop () Delete the last trailing element
7. Copy and replace by subscript l[1] = ' America '
Reference Address: http://www.jb51.net/article/76339.htm

' Set ': cannot contain duplicate elements
Creation method: Set () a={' A ', ' B ', ' C '}
Method:
1. Add and remove elements via add and remove
2. Merger: A + A
3. Add the update element after splitting
4. Get x for X in S
5, | and set
6. & Intersection
7.-Difference Set ^ symmetric difference set
Reference Address: http://blog.csdn.net/business122/article/details/7541486

"Tuple": tuple can only convert list to tuple, other types cannot be converted
How to create: Tuple () a= (' A ', ' B ', ' C ')
Method:
Interception: a[head Subscript: Tail Subscript: Per step value] The default is: 1
1. Increase: A + a equals a*2
2. Merger: A + A
3, Max (tuple): Returns the maximum value of an element in a tuple.
4, min (tuple): Returns the element minimum value in the tuple.
5, tuple (seq): Converts a list to a tuple.
6. CMP (Tuple1, Tuple2): Compares two tuple elements.
7. Len (tuple): Calculates the number of tuple elements.
Reference Address: http://www.jb51.net/article/47986.htm
"Dict": Dict () with a minimum of two parameters
Creation method: Dict (A=b,c=d) a={' a ': ' B ', ' C ': ' d '}
Method:
1, update a[' keyName '] = newvalue
2. Merger: D.update (D2) can merge D2 into D
3, add a[' keyName '] = newvalue
4. Get a[' keyName ']
5. Keys (). VALUES ()
6. Pop (' KeyName ') deletes the corresponding key-value pair according to key and returns the value
7, del dict[' Name ']; # Delete key is ' Name ' entry
Dict.clear (); # Empty Dictionary all entries
Del Dict; # Delete Dictionary
Reference Address: http://www.jb51.net/article/47990.htm

What are the variable types of

Python? and a summary of the variable types