Nested List Comprehension We can also use nested loops in list comprehension. Let's write code to compute a multiplication table. multiplication = [[i * j for j in range(1, 6)] for i in range(2, 5)] print(multiplication) Run Code Output [[2, 4, 6, 8, 10], [3, 6, 9, 12...
The first loop goes through the outer list; the second for loop goes through the nested lists. $ ./flatten_list.py [1, 2, 3, 3, 4, 5, 6, 7, 8] Python nested list comprehensions The initial expression in a Python list comprehension can be another list comprehension. nested_list_comp...
Nested List Comprehensions >>> matrix = [ ... [1, 2, 3, 4], ... [5, 6, 7, 8], ... [9, 10, 11, 12], ... ] The following list comprehension will transpose rows and columns: >>> [[row[i] for row in matrix] for i in range(4)] [[1, 5, 9], [2, 6, 10],...
Your job in this exercise is to write a list comprehension that produces a list of the squares of the numbers ranging from 0 to 9. Createlistcomprehension: squares squares = [i**2foriinrange(0,10)] nested list comprehensions [[output expression]foriterator variableiniterable] writing a list...
Learn how to effectively use list comprehension in Python to create lists, to replace (nested) for loops and the map(), filter() and reduce() functions, ...!
for x in range(1, 11)]# nested list comprehension to flatten listmatrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]flat_list = [num # append to list for row in matrix # outer loop for num in row] # inner loopprint(_list)print(flat_list)字典和集合推导式分别对于创建...
flattened_list = [item for sublist in nested_list for item in sublist] print(flattened_list) # 输出: [1, 2, 3, 4, 5, 6, 7, 8, 9] 在这个例子中,我们使用了两个嵌套的 for 循环来遍历嵌套列表的每个元素和子列表的每个元素。注意,在列表推导式中,我们可以根据需要添加任意数量的 for 和 if...
Example 1: Rearrange 2D List Using Nested List Comprehension In this first example, we are going to usenested list comprehensionto rearrange the 2D list: transposed=[[row[i]forrowinoriginal]foriinrange(len(original[0]))]print(transposed)# [[1, 3, 5], [2, 4, 6]] ...
# nested list comprehension to flatten list matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] flat_list = [num # append to list for row in matrix # outer loop for num in row] # inner loop print(_list) print(flat_list) ...
If an object inside a tuple is mutable, such as a list, you can modify it in-place. Copy tup =tuple(['foo', [1,2],True)# TypeErrortup[2] =False# Allowedtup[1].append(1) List# list.pop(3),表示去掉 index=3 处的元素。