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Saturday, April 17, 2021

  1. capitalize() Converts the first character to upper case
  2. casefold() Converts string into lower case
  3. center() Returns a centered string
  4. count()         Returns the number of times a specified value occurs in a string
  5. encode() Returns an encoded version of the string
  6. endswith() Returns true if the string ends with the specified value
  7. expandtabs() Sets the tab size of the string
  8. find()         Searches the string for a specified value and returns the position of where it was found
  9. format() Formats specified values in a string
  10. format_map() Formats specified values in a string
  11. index()  Searches the string for a specified value and returns the position of where it was found
  12. isalnum() Returns True if all characters in the string are alphanumeric
  13. isalpha() Returns True if all characters in the string are in the alphabet
  14. isdecimal() Returns True if all characters in the string are decimals
  15. isdigit() Returns True if all characters in the string are digits
  16. isidentifier() Returns True if the string is an identifier
  17. islower() Returns True if all characters in the string are lower case
  18. isnumeric() Returns True if all characters in the string are numeric
  19. isprintable() Returns True if all characters in the string are printable
  20. isspace() Returns True if all characters in the string are whitespaces
  21. istitle() Returns True if the string follows the rules of a title
  22. isupper() Returns True if all characters in the string are upper case
  23. join()         Joins the elements of an iterable to the end of the string
  24. ljust()  Returns a left justified version of the string
  25. lower()         Converts a string into lower case
  26. lstrip() Returns a left trim version of the string
  27. maketrans() Returns a translation table to be used in translations
  28. partition() Returns a tuple where the string is parted into three parts
  29. replace() Returns a string where a specified value is replaced with a specified value
  30. rfind()         Searches the string for a specified value and returns the last position of where it was found
  31. rindex() Searches the string for a specified value and returns the last position of where it was found
  32. rjust()         Returns a right justified version of the string
  33. rpartition() Returns a tuple where the string is parted into three parts
  34. rsplit() Splits the string at the specified separator, and returns a list
  35. rstrip() Returns a right trim version of the string
  36. split()         Splits the string at the specified separator, and returns a list
  37. splitlines() Splits the string at line breaks and returns a list
  38. startswith() Returns true if the string starts with the specified value
  39. strip()         Returns a trimmed version of the string
  40. swapcase() Swaps cases, lower case becomes upper case and vice versa
  41. title()         Converts the first character of each word to upper case
  42. translate() Returns a translated string
  43. upper()         Converts a string into upper case
  44. zfill()         Fills the string with a specified number of 0 values at the beginning

my-courses.net

Exercise 22

Write an algorithm in python that returns the list of duplicate elements of a given list without using any predefined functions in Python. Example if L = [7, 23, 5, 12, 7, 19, 23, 12, 29], the algorithm returns the list [7, 23, 12].

Solution

Friday, April 16, 2021

Exercise 12

Using the sort () method, write an algorithm in python as a function which takes as parameter a list L of numbers and which returns the couple (min, max) formed by the minimum and the maximum of the list.

Solution

def minMax(L):
     # sorting the liste
     L.sort()

     return (L[0] , L[-1])

# Exemple
L = [41, 19 , 5 , 21 ,7 , 11]

print(minMax(L)) # the out put is:  (5, 41)



Younes Derfoufi
my-courses.net

Exercise 11

Write an algorithm in python as a function which takes as parameter a tuple (L, n) formed by a list L of numbers and an integer n and which returns the list obtained from L by multiplying its elements by n . Example if L = [3, 9, 5, 23] and n = 2 the function returns the list: [6, 18, 10, 46]

Solution

Exercise 10

Write an algorithm in python as a function which takes as a parameter a tuple (L, x) formed by a list L and an element x and which returns the position of the element x in the list L. The function must return -1 if element x is not in the list.

Solution

Thursday, April 15, 2021

Exercise9

Write an algorithm in python as a function which takes as parameter a tuple (L, a) formed by a list L and an element a and which returns True if the element a is present in the list L and False if no.

Solution

def examineList (L, a):
     if a in L:
          return True
     else: return False
# Example
L = [13, 9, 5, 23]
a = 5
print (examineList (L, a)) # the output is: True


Younes Derfoufi
my-courses.net

Exercise8

Write an algorithm in python that returns the average of the terms in a list of numbers.

Solution

def averageList (L):
    # initialization of the average
    m = 0
    for x in L:
        m = m + x
    # average = sum of the elements of L / length of L
    m = m / len(L)
    return m

# Example
L = [3, 7, 8, 2]
print ("the average is: m =", averageList (L))
# the output is: the average is: m = 5.0
 
Younes Derfoufi
my-courses.net

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