Question

我有这样的数据列表：

data = ['Data_0',
  ['param_1', 0],
  ['param_2', 1],
  ['param_3', 3.14],
  ['param_n', 375],
  ['param_6' , 67],
  'Data_1',                                     
  ['param_1', 1],
  ['param_2', 2],
  ['param_3', 3.4],
  ['param_n', 6785],
  ['param_6',678],
  'Data_2',
  ['param_1', 1],
  ['param_2', 3],
  ['param_3', 2.19],
  ['param_n', 345],
  ['param_6', 675]]

我需要像这样分割数据列表的代码：

sliced_data_0 = [
'Data_0',
['param_1', 1],
['param_2', 2],
['param_3', 3.4],
['param_n', 6785],
['param_6',678],

sliced_data_1 = [
'Data_1',
['param_1', 1],
['param_2', 2],
['param_3', 3.4],
['param_n', 6225],
['param_6',678],

sliced_data_2 = [
'Data_2',
['param_1', 1],
['param_2', 2],
['param_3', 3.4],
['param_n', 12385],
['param_6',623],

我需要一些可以循环运行的代码

for i in data:
    update_method(sliced_data_[i])

预先感谢，堆叠！在此先感谢，堆叠！预先感谢，堆叠！预先感谢，堆叠！

Answer 1

如果您知道要拆分的子列表的长度，则可以将yield与香草python结合使用。从函数中调用此函数并在list()中捕获结果，即可将数据切成碎片。

def slicep(arr):
  for i in range(0, len(arr), 4):
    yield arr[i:i + 4]

def update_method(arr):
  print(arr)


data = [1,[2, False],[3, 1],[4, 3.14],5,[6, True],[7, 0],[8, 2.19],9,[0, False],[1, 1],[2, 6.12]]

sliced_data = list(slicep(data))

for sublist in sliced_data:
  update_method(sublist)

Demo

您可以将list()的结果捕获到一个变量中，该变量将成为切片列表的列表。然后，您可以遍历此条目，并在每个条目上调用update_method()。

Answer 2

for i in range(0, len(data), 4):
    update_method(data[i:i+4])

或

for sub_data in zip(*(data[i::4] for i in range(4)))):
    update_method(sub_data)

Answer 3

谢谢你们！我刚刚添加了用于切片的计数线的方法：

def line_counter(data):
    block_count = 0
    line_count = 0
    for string in data:
        if type(string) is str:
            block_count += 1
        if type(string) is list and block_count == 1:
            line_count += 1
    return line_count


def slicer(data, count_of_lines_in_data):
    for string in data:
        if type(string) is str:
            data.remove(string)
    for i in range(0, len(data), count_of_lines_in_data):
        yield data[i:i + count_of_lines_in_data]

def update_method(sublist):
    print(sublist)



if __name__ == "__main__":


  data = ['Data_0',
  ['param_1', 0],
  ['param_2', 1],
  ['param_3', 3.14],
  ['param_n', 375],
  ['param_6' , 67],
  'Data_1',
  ['param_1', 1],
  ['param_2', 2],
  ['param_3', 3.4],
  ['param_n', 6785],
  ['param_6',678],
  'Data_2',
  ['param_1', 1],
  ['param_2', 3],
  ['param_3', 2.19],
  ['param_n', 345],
  ['param_6', 675]]

  count_of_lin = line_counter(data)

  sliced_data = list(slicer(data, count_of_lin))
  for sublist in sliced_data:
    update_method(sublist)

这是必需的，因为数据列表中的参数数量不是4，而是可以变化的。

Demo

在列表中切片数据

3 个答案: