This is a list of the string type functions summarized in https://docs.python.org/3/library/stdtypes.html.
| Function | Description |
|---|---|
| str.capitalize() | Return string with first letter capitalized and rest lowercase. |
| str.casefold() | Make string lowercase with additional special characters (e.g. German ß) changed. |
| str.center(width, {fillchar}) | Center string in string with new width, with padded spaces or {fillchar} padding. |
| str.count(substring, {start, {end}}) | Return number of substrings in string, over entire string or from {start} index, or from {start} to {end} indices. |
| str.encode(encoding=’utf-8′, errors=’strict’) | Convert string to byte array with default (utf-8) or specified encoding. Second parameter refers to how errors should be handled, see here. |
| str.endswith(substring, {start, {end}}) | Return True if string ends with substring. Optional index range can be specified. |
| str.expandtabs(tabsize=8) | Replace tabs in string with number of spaces specified by tabsize parameter. |
| str.find(substring, {start, {end}}) | Find substring in string, return index or -1. Optional index range can be specified. |
| str.format(*args, **kwargs) | Print a formatted string. See here. |
| str.format_map(mapclass) | This function can take a custom keyworded mapping class and use it to print formatted output, useful if some key parameters may not have corresponding values. |
| str.index(substring, {start, {end}} | Same as “find” function, but raise ValueError if substring isn’t found, rather than returning -1. |
| str.isalnum() | Return True if string only contains alphanumeric characters. |
| str.isalpha() | Return True if string only contains alphabetic characters. |
| str.isascii() | Return True if string contains only ASCII characters (the first 128 chars in Unicode encoding). |
| str.isdecimal() | Return True if string only contains base-10 digits. |
| str.isdigit() | Like isdecimal(), but include characters such as superscript digits. |
| str.isidentifier() | Return True if string can be used as variable name. |
| str.islower() | Return True if characters are lowercase and there is at least one alphabetic character. |
| str.isnumeric() | Return True if characters are all digits and/or valid numeric Unicode characters. |
| str.isnumeric() | Return False if string contains Unicode characters which are considered unprintable. |
| str.isspace() | Return True if string contains only whitespace characters. |
| str.istitle() | Return True if string is valid titlecase (uppercase letters don’t immediately follow lowercase letters, words begin with uppercase letters). |
| str.isupper() | Return True if string only contains uppercase characters. |
| str.join(iterable) | Return new string that has string representation of elements in the iterable data structure joined with string. |
| str.ljust(width, {padding}) | Return left justified string with width {width} and padded spaces, or charater specifed by {padding}. |
| str.lower() | Return string converted to lowercase. |
| str.lstrip({chars}) | Return string with spaces or characters in {chars} removed from front of string. |
| static str.maketrans({x, {y, {z}) | Make translation table for str.translate(table). |
| str.partition(sep) | Return 3-tuple with string before separator, separator, and string after separator, or full string followed by two empty elements if separator doesn’t occur in string. |
| str.removeprefix(prefix) | Return string with prefix removed, or original string if string doesn’t have prefix. |
| str.removesuffix(suffix) | Return string with suffix removed, or original string if string doesn’t have suffix. |
| str.replace(old, new, {count}) | Return string with old substrings replaced with new substring, throughout entire string or with {count} replacements maximum. |
| str.rfind(sub, {start, {end}}) | Return index of rightmost match of substring in string, using entire string or from {start} to optional {end}. |
| str.rindex(sub, {start, {end}}) | Same as rfind, but raise ValueError rather than returning -1 if substring doesn’t occur. |
| str.rjust(width, {padding}) | Return right-justified string of width {width}, with padded spaces or character specified in {padding}. |
| str.rpartition(sep) | Like str.partition(sep), but start searching for separator from end of string rather than beginning. |
| str.rsplit(sep=None, maxsplit=-1) | Like str.split function, but start from end of string rather than beginning. |
| str.rstrip({chars}) | Return string with trailing spaces or characters in {chars} removed. |
| str.split(sep=None, maxsplit=-1) | Return list with string split at spaces or {sep}, split throughout string or a maximum of {maxsplit} times. |
| str.splitlines(keepends=False) | Return list of strings split at newline chars, set {keepends} to True to keep the newline chars in split strings. |
| str.startswith(sub, {start, {end}}) | Return True if string starts with substring, can also check string from {start} idx to optional {end} idx. |
| str.strip({chars}) | Return string with leading and trailing spaces or characters specfied in {chars} stripped. |
| str.swapcase() | Return string with lowercase chars converted to uppercase, and vice versa. |
| str.title() | Return titlecase string, where words start with capital letters, doesn’t work properly with apostrophes though. |
| str.translate(table) | Return string with characters converted to others using table construted with str.maketrans function. |
| str.upper() | Return string with characters converted uppercase. |
| str.zfill(width) | Return string with a width of {width}, padding beginning of string with zeros if original string isn’t wide enough. |