Add files via upload

Author: Vitosh

PythonTries/1836_Comprehensions/GeneralComprehension.py

@@ -0,0 +1,57 @@
+def main():
+
+    #list not in list
+    vowels = ['a', 'u', 'e', 'i', 'o', 'A', 'U', 'E', 'I', 'O']
+    text = "https://vitoshacademy.com is my blog."
+    no_vowels = ''.join([x for x in text if x not in vowels])
+    print(no_vowels)
+
+    #print every second letter
+    every_second = text[::2]
+    print(every_second)
+    every_second = "".join([x for i, x in enumerate(text) if i % 2 == 1])
+    print(every_second)
+
+    #list in list
+    only_vowels = "".join([x for x in text if x in vowels])
+    print(only_vowels)
+
+    #dictionary from a string
+    letters = list(text)
+    occurrences = {char: letters.count(char) for char in letters}
+    print(occurrences)
+    char_dict = {char: ord(char) for char in letters}
+    print(char_dict)
+
+    #creation of 1D matrix:
+    matrix1D = [j for j in range(100,105)]
+    print(matrix1D)
+
+    #creation of a 2D matrix:
+    matrix2D = [[j for j in range(4)] for i in range(10)]
+    print(matrix2D)
+
+    #creation of a 3D matrix:    
+    matrix3D = [[[j for j in range(10,12)] for i in range(2)] for z in range(2)]
+    print(matrix3D)
+
+    #2D matrix to list:
+    flattened = [num for sublist in matrix2D for num in sublist]
+    print(flattened)
+
+    #numbers, divisable by a set of other numbers
+    numbers = [num for num in range(100, 150)]
+    set_of_other_numbers = [num for num in range(2, 20)]
+    divisable = [num for num in numbers if any([num % x == 0 for x in set_of_other_numbers])]
+    print("divisable: {0}\n".format(divisable))
+
+    #numbers, non divisable by a set of other numbers
+    non_divisable =  [num for num in numbers if all([num % x != 0 for x in set_of_other_numbers])]
+    print(non_divisable)
+    
+    #numbers, non divisable by a set of other numbers, simple
+    non_divisable = [num for num in numbers if num not in divisable]
+    print(non_divisable)
+
+if __name__ == "__main__":
+    main()