Python String Methods

Refer to the website below for the detailed instructions.

https://www.w3schools.com/python/python_ref_string.asp

Python String Methods

 

1. len(str)

- returns the length of the string

 

2. min(str), max(str)

- returns the min or max alphabetical character

 

3. str1.count(str2, begin, end):

- returns how many str2 is in str1[begin:end]

* Note that end index is not included

 

4. str1.startswith(str2, begin, end):

- returns whether str1 starts with str2

 

5. str1.endswith(str2, begin, end):

- returns whether str1 ends with str2

 

6. str1.rfind(str2)

- returns the index of the starting index of str2 in str1

- search starts from the right

- if str2 not in str1 -> returns -1

 

7. str1.index(str2)

- returns the index of str2 in str1

- if str2 not in str1 -> raises ValueError

 

8. str1.rindex(str2)

- returns the index of the starting index of str2 in str1

- search starts from the right

- if str2 not in str1 -> raises ValueError

 

9. str1.isalnum():

- returns whether str1 and all characters are alpahnumeric

 

10. str1.isalph()

- returns whether str1 and all characters are alphabetic

 

11. str1.isdigit()

- returns whether str1 and characters are digits

https://www.w3schools.com/python/ref_string_isdigit.asp

Python String isdigit() Method

 

12. str1.isnumeric():

- returns whether str1 and characters are digits

- basically very similar to isdigit(), with some minor differences. check out the below link for details.

https://www.w3schools.com/python/ref_string_isnumeric.asp

Python String isnumeric() Method

 

13. str1.isdecimal():

- returns whether str1 and all characters are in [0-9]

 

14. str1.islower():

- returns whether str1 and allcharacters are in lowercase.

 

15. str1.isupper()

- returns whether str1 and allcharacters are in uppercase.

 

16. str1.lower()

- returns a string where all str1's uppercase letters are converted to lowercase ones.

 

17. str1.upper():

- returns a string where all str1's lowercase letters are converted to uppercase ones.

 

18. str1.swapcase()

- returns a string where all str1's lowercase letters are converted to uppercase ones and vice versa.

 

19. str1.istitle()

- returns whether str1 and str1 is properly "titlecased"

 

20. str1.title()

- returns a new string which is 'titlecased' form of str1

 

21. str1.capitalize()

- returns a new string str1 of which first character converted to uppercase

 

22. str1.lstrip(set of characters)

txt = ",,,,,ssaaww.....banana"
x = txt.lstrip(",.asw")
print(x)

txt ='               moce'
x = txt.lstrip()
print(x)

 

23. str1.rstirp()

- returns a new string after removing spaces to the right of str1

 

24. str1.strip()

- if no params, returns a new string after removing spaces to the left & right of str1

- if params, returns a new string after removing those characters of str1

 

25. str1.isspace()

-returns whether str1 only consists of spaces

 

26. str1.center(width)

- returns a centered string with the given width

 

27. str.split(seperator, maxsplit)

- split the str to a list

https://www.w3schools.com/python/ref_string_split.asp

Python String split() Method

x = 'a b c d e f g'
l = x.split(maxsplit=3)
print(l)

 

28. str.splitlines(keeplinebreaks=False)

- returns a list with splitted string by line breakers

 

29. str.replace(oldvalue, newvalue, count)

https://www.w3schools.com/python/ref_string_replace.asp

Python String replace() Method

 

30. str.join(iterable)

https://www.w3schools.com/python/ref_string_join.asp

Python String join() Method

 

31. str.zfill(len)

- adds zeros to the start of the string until the given length

 

32. str.ljust(length, character)

- left justifies the string and add characters until the given length

 

33. str.rjust(length, character)

- right justifes the string and add characters until the given length

txt = "banana"

x = txt.rjust(20, 'x')

print(x, "is my favorite fruit.")

 

34. str.format(val1, val2, val3...)

https://www.w3schools.com/python/ref_string_format.asp

Python String format() Method