Python string built-in functions

string.capitalize()
Capitalize the first character of the string

string.center(width)
Return a new string with the original string centered and padded with spaces to the length of width

string.count(str , beg=0,end=len(string))
Returns the number of times str appears in string. If beg or end is specified, returns the number of times str appears in the specified range

string.decode(encoding='UTF-8', errors='strict')
Decode string in the encoding format specified by encoding. If an error occurs, a ValueError exception will be reported by default, unless errors specify 'ignore' or 'replace'

string.encode(encoding='UTF-8' , errors='strict')
Encode the string in the encoding format specified by encoding. If an error occurs, a
ValueError exception will be reported by default, unless errors specify 'ignore' or 'replace'

string.endswith(obj, beg=0 ,end=len(string))
Check whether the string ends with obj. If beg or end is specified, check whether the specified range ends with obj. If so, return True, otherwise return False.

string.expandtabs(tabsize =8)
Convert the tab symbols in the string to spaces. The default number of spaces tabsize is 8.

string.find(str, beg=0,end=len(string))
Detect whether str is included in string , if beg and end specify a range, check whether it is included in the specified range, if so, return the starting index value, otherwise return -1

string.index(str, beg=0,end=len(string))
The same as the find() method, except that an exception will be reported if str is not in the string.

string.isalnum()
If the string has at least one character and all characters are letters or numbers, it returns True, otherwise it returns False

string.isalpha()
Returns True if string has at least one character and all characters are letters, otherwise returns False

string.isdecimal()
Returns True if string only contains decimal digits, otherwise returns False.

string. isdigit()
Returns True if string contains only digits, otherwise returns False.

string.islower()
If string contains at least one case-sensitive character, and all these (case-sensitive) characters are lowercase, It returns True, otherwise it returns False

string.isnumeric()
If the string only contains numeric characters, it returns True, otherwise it returns False

string.isspace()
If the string only contains spaces, it returns True, otherwise Returns False.

string.istitle()
Returns True if string is titled (see title()), otherwise returns False

string.isupper()
If string contains at least one case-sensitive character, And all these (case-sensitive) characters are uppercase, then return True, otherwise return False

string.join(seq)
Merges (concatenates) uses string as the delimiter to merge all elements in seq (string Represents) merged into a new string

string.ljust(width)
Returns a new string with the original string left-aligned and padded with spaces to length width

string.lower()
Convert all uppercase letters in string The characters are lowercase.

string.lstrip()
Truncate the space on the left side of string

string.partition(str)
It’s a bit like a combination of find() and split(), starting from the first position where str appears, Divide the string string into a 3-element tuple (string_pre_str, str, string_post_str). If the string does not contain
str, then string_pre_str == string.string.replace(str1, str2,num=string.count(str1)) str1 in string is replaced with str2. If num is specified, the replacement will not exceed num times.

string.rfind(str, beg=0,end=len(string))
Similar to the find() function, but from the right Start searching.

string.rindex(str, beg=0,end=len(string))
Similar to index(), but starting from the right.

string.rjust(width)
Returns an original string right Align and fill a new string with spaces to length width

string.rpartition(str)
Similar to the partition() function, but starting from the right.

string.rstrip()
Remove string at the end of the string Space.

string.split(str="", num=string.count(str))
Use str as the delimiter to slice string. If num has a specified value, only num substrings will be separated

string.splitlines( num=string.count('n'))
b, c are separated by rows and return a list containing each row as an element
. If num is specified, only num
rows are sliced.
string.startswith(obj, beg=0 ,end=len(string))
Check whether the string starts with obj, if so, return True, otherwise return False. If beg and end specify values, check within the specified range.

string.strip([obj])
Execute lstrip() and rstrip() on string

string.swapcase()
Flip the case in the string

string.title()
Return a "titled" string, which means that all words start with uppercase , the remaining letters are all lowercase (see istitle())

string.translate(str, del="")
Convert the characters of string according to the table given by str (containing 256 characters), and put the characters to be filtered out into In the del parameter

string.upper()
Convert the lowercase letters in string to uppercase

string.zfill(width)
Return a string with length width. The original string string is right-aligned and padded in front
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