Data base types and commands for Python

In : determine if a character is in a string

Not ni: determine if something is in something

Base: convert to Binary

bit_length : Binary of the current number, at least in several representations

capitalize: Initial Capitalization if there are other uppercase characters in the string, it becomes lowercase

Casefold: Turn all the lowercase

Lower: just turn English into lowercase

Center: Set the width and center the character

Center (Width,fillchar)

Count: indicates the number of characters that appear

count ("_", Start,end)

EndsWith: endswith (self,suffix,start,end) indicates the judgment or not of what to start or end with.

StartsWith: Starswith (self,suffix,start,end) indicates the judgment or not of what to start or end with.

Find: Find (self,sub,star,end) from the beginning, and perhaps its location

format : Format (*args,**kargs) to replace placeholders in a string with the specified values

For example:

test='I love {you}'print(test) v=test.format (you="She  ")print(v)

Format_map: formatted, passed in value {"abc": "Def", "a": "A")

isalnum: determines that the string contains only alphanumeric

isalpha: Determine if the string is a letter

Isdecimal: Judging whether a string is a number (judging ② is not a number)

isdigit: determine if the string is a number (you can tell ② is a number)

isnumeric: Determine if the string is a number (both the two and 2 types of ② and Chinese are judged to be numbers)

islower: determine if lowercase

Lower: Convert to lowercase

isupper: Judging capitalization

Upper: converting to uppercase

isprintable: does not print if an invisible, such as newline character \ n, is present in the print

Isspace: Determines whether the string is a space, if not all the space is wrong

istitle: determine if the first letter in the title is uppercase

Title : Convert the first letter in the title to uppercase

join: Separate the strings

For example:

A="  iloveyou"b="_"= B.join (a) Print (v) _i_l_o_v_e_y_o_u

rjust: rjust (Self,width,fillchar) fill in the front of a string

Lstrip:rstrip:strip: Remove the space on the left or right side of the character or blank line or specify the character in the brackets below to remove it

Maketrans: Substitution of correspondence relation

Partition: Divide the string into three parts

swapcase: Conversion of size

Data base types and commands for Python