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list-comprehensions.py
79 lines (60 loc) · 2.1 KB
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list-comprehensions.py
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############################################################
even = []
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for number in numbers:
if number % 2 == 0:
even.append("Y")
else:
even.append("N")
print(even)
# ['N', 'Y', 'N', 'Y', 'N', 'Y', 'N', 'Y', 'N', 'Y']
even = ["Y" if number % 2 == 0 else "N" for number in numbers:]
print(even)
# ['N', 'Y', 'N', 'Y', 'N', 'Y', 'N', 'Y', 'N', 'Y']
############################################################
new_list =[]
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for number in numbers:
if number % 10 == 0:
new_list.append("ten")
elif number % 8 ==0:
new_list.append("eight")
elif number % 6 == 0:
new_list.append("six")
elif number % 4 == 0:
new_list.append("four")
else:
new_list.append(number)
print(new_list)
# [1, 2, 3, 'four', 5, 'six', 7, 'eight', 9, 'ten']
new_list = ["ten" if number % 10 == 0 else "eight" if number % 8 == 0 else "six" if number % 6 == 0 else "four" if number % 4 == 0 else number for number in numbers]
print(new_list)
# [1, 2, 3, 'four', 5, 'six', 7, 'eight', 9, 'ten']
new_list = [
"ten" if number % 10 == 0
else "eight" if number % 8 == 0
else "six" if number % 6 == 0
else "four" if number % 4 == 0
else number
for number in numbers
]
print(new_list)
# [1, 2, 3, 'four', 5, 'six', 7, 'eight', 9, 'ten']
############################################################
############################################################
matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
flattened = []
for row in matrix:
for item in row:
flattened.append(item)
print(flattened)
# [1, 2, 3, 4, 5, 6, 7, 8, 9]
flattened = [item for row in matrix for item in row]
print(flattened)
# [1, 2, 3, 4, 5, 6, 7, 8, 9]
############################################################
matrix = [[item for item in range(5)] for row in range(3)]
print(matrix)
# [[0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4]]
############################################################
## [Ref Link](https://www.mybluelinux.com/python-list-or-any-iterable-comprehension/)