Python beginner day1--(basic data types and common methods in Python)

Basic data types and common methods in Python

Common data types in Python are: string (str), list, tuple (tuple), dictionary (DITC), collection (set)

(a) string

Common methods of strings:

1, index, the character of the corresponding position is output by subscript.

eg:i = ' Hello World '

Print (i[3]) Result: ' L '

2, Length (len), gets the length of a string.

eg:i = ' Hello '

Print (len (i)) Results: 5

3, remove whitespace (strip), remove whitespace (spaces) on both sides of the string.

eg:i = ' Hello '

new_i = I.strip ()

Print (new_i) results: Hello

4, Split (split), divides a string into two parts.

eg:i = ' HelloWorld '

new_i = I.split (' ll ')

Print (new_i) Result: [' he ', ' Oworld ']

5, slices, gets a part of the string.

i = ' HelloWorld '

Print (I[1:5]) Result: ' Ello '

It is important to note that the subscript in Python starts at 0.

(ii) List

List of commonly used methods:

1, index 2, Slice 3, append 4, delete 5, length 6, loop 7, inclusive

(iii) tuples

1, index 2, slice 3, length 4, loop 5, including

(d) Dictionaries

1, index 2, add 3, delete 4, length 5, loop

(v) Collection

1, add 2, delete 3, length 4, loop

Python beginner day1--(basic data types and common methods in Python)