1, three major processes of program development:
- Order--execute code from top to bottom
- Branching-determines the branch that executes the code, judging by the condition
- Loop--to let specific code repeat the execution
2,whlie Loop statement:
- Break when a condition satisfies, exits the loop and does not execute subsequent duplicate code.
- Continue when a condition is met, no subsequent code is executed.
3, String method
- Join concatenation string
- Count finds the number of occurrences of a string
- Capitalized capitalize the first letter of the entire string
- Add a corresponding string to both sides of center
- EndsWith to see if a string ends with a content and returns a Boolean value
- StartsWith to see if a string starts with a content and returns a Boolean value
- Expandtabs converts the tab symbol in a string to 8 spaces
- Find to view the position of a content in a string and return the index
- Format formats the output in a value-assigned manner
- Format.map format the output in a dictionary
- Index is the same as Find method, no error will be
- Isalnum determines whether a string is a number or a letter
- Isdecimal determine if the number is a decimal
- IsDigit Judging whether it is a number
- Isalpha to determine if it is a letter
- Isidentifier determine if it is an illegal variable
- Islower determine if the string is all lowercase
- Isupper determine if the string is all uppercase
- Isspace to determine if a string has spaces
- Istitle to determine if the first letter in a string is uppercase
- Lower string All lowercase
- Upper string All uppercase
- Swapcase string uppercase to lowercase, lowercase to uppercase
- Liust string followed by a corresponding number character
- Rjust string preceded by a corresponding number character
- Strip to remove spaces and line breaks from a string
- Lstrip only the left space and newline characters of the string are removed.
- Rstrip only the whitespace and newline characters to the right of the string are removed.
- Replace replaces some characters in a string with other characters
- Split divides a string into a list by a content
- Title The first letter of each part that is not separated by a letter
- Copy copies a list to be received with a variable
4, List method: Increase
-
- Append is appended from the back, only one at a time
- Insert is inserted by index, only one at a time
- Extend iterative Append
By deleting
-
- Remove is deleted by element, only one at a time
- Pop is deleted by index and can also be sliced with step size
- Clear Empty List
Del |
Delete entire list |
|
Delete by index |
|
Delete by Slice plus step |
Change
-
- To change by index
- By Slice plus step change
Check
-
- According to the need, slice plus step to check
- Use for loop to check
Other methods
-
- Len () query list length
- Count counts the number of occurrences of an element
- Index is indexed by element
- Sort sorted list, reverse=true in parentheses is from big to small
- Reverse Flashbacks List
- Enumerate for A For loop, add sequence numbers to sequences
5, Dictionary methodIncrease
-
- SetDefault is not moving, no increase
By deleting
-
- Pop button Delete
- Popitem Delete the last
- Clear Clear
- Del Delete key or full divide
Change
-
- Update merges another key-value team into one, the same overlay, without adding
Check
-
- Get has a return value, no null is displayed
- Keys
- Values
- Items
6, the collection method increases
-
- Add a String
- Updata Iterative Add-on
By deleting
-
- Remove by Element
- Disjird the collection of the delete, with remove delete is the same, no no error
- Pop randomly deletes an element
- Clear Empty Collection
- Del Delete Entire collection
- Intersection "& or intersection"
The collection "| or union "difference set"-or difference "inverse intersection" ^ or symmetric_difference "subset and superset" < or > "Frozenset immutable Collection, making the collection an immutable type
Python basic growth path four-basic data type method
