Python's total string

Python is the most commonly used type, expressed in single quotation marks. A string between three quotes can span multiple lines and can be output as-is.

Character types are not supported in Python, and characters are strings.

CRUD For---strings

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---escape character

Most have the same transfer character as other languages

　

\v	Portrait tab
\ t	Horizontal tab
\ r	Enter
\f	Page change
\oyy	Octal number, the character represented by YY, for example: \o12 for newline
\xyy	Hexadecimal number, the character represented by YY, for example: \x0a for line break
\other	Other characters are output in normal format

Arithmetic of---string

+	String connection	>>>a + b 'hellopython'
*	Repeating output string	>>>a * 2 'hellohello'
[]	Getting characters in a string by index	>>>a[1] 'e'
[ : ]	Intercept part of a string	>>>a[1:4] 'ell'
Inch	Member operator-Returns TRUE if the string contains the given character	>>>"H" in a True
Not in	Member operator-Returns TRUE if the string does not contain the given character	>>>"M" not in a True
R/r	Raw string-Raw string: all strings are used directly as literal meanings, without escaping special or non-printable characters. The original string has almost exactly the same syntax as a normal string, except that the first quotation mark of the string is preceded by the letter "R" (which can be case).	>>>print r \ n ' \n >>> print r'\ n ' \n
%	format string	Take a look at the next chapter

---Python's total formatted output

Use of sprintf functions similar to those in the C language

---three quotes

Three quotes allow programmers to escape from the mire of quotes and special strings, keeping a small piece of string in the form of a so-called WYSIWYG (what you see is what you receive) format.

Like what:

hi = "HI"

There ""

Print hi

The content of the output is:

Hi

There

Keep the original style in three quotes, with a default of \ n

--python the built-in function of a string

This piece is quite a lot, you can view the Python manual directly

String.count (str, beg=0, End=len (String))

Returns the number of occurrences of STR in a string, if beg or end specifies that the number of STR occurrences in the specified range is returned

String.endswith (obj, beg=0, End=len (String))

Checks whether the string ends with obj, or returns False if beg or end specifies whether to end with obj in the specified range, or True if it is.

String.find (str, beg=0, End=len (String))	Detects if STR is contained in a string, and if beg and end specify a range, the check is contained within the specified range, and returns 1 if the index value is returned.
String.index (str, beg=0, End=len (String))	Just like the Find () method, only if STR does not report an exception in string.

String.Join (seq)

Merges all the elements in the SEQ (the string representation) into a new string, using string as a delimiter

String.partition (str)

A bit like the combination of find () and split (), from the first position where Str appears, divide the string into a 3-element tuple (STRING_PRE_STR,STR,STRING_POST_STR), if string STR is not included in the STRING_PRE_STR = = string.

String.Replace (str1, str2, Num=string.count (STR1))

Replace the str1 in string with the str2, if NUM is specified, the replacement is no more than num times.

String.Split (str= "", Num=string.count (str))

Slice string with a delimiter of STR, if NUM has a specified value, only the NUM substring is delimited

String.translate (str, del= "")

Converts a string of characters according to the table given by STR, which contains 256 characters, The characters to filter out are placed in the Del parameter

Python's total string