Question

如何按三个具有特定顺序的列对文本文件进行排序？

我的text_file采用以下格式，列之间有空格：

Team_Name Team_Mascot Team_Color Team_Hometown Number_of_Wins Team_Coach

示例：

Bears LittleBear Blue Beartown 15 BigBear

我想首先按Team_Color排序，Team_Hometown第二，Number_of_Wins按升序排序。

因此属性：

Bears Blue Beartown 15 Coach1
Bears Red  Dogtown 30 Coach6
Bears Blue Cattown 15 Coach2
Bears Red  Beartown 15 Coach4
Bears Blue Cattown 17 Coach3
Bears Red  Dogtown 9 Coach5

我的预期输出是一个已排序的文本文件：

Bears Blue Beartown 15 Coach1
Bears Blue Cattown 15 Coach2
Bears Blue Cattown 17 Coach3
Bears Red  Beartown 15 Coach4
Bears Red  Dogtown 9 Coach5
Bears Red  Dogtown 30 Coach6

我考虑过使用lambda，但我的值都不是元组 https://docs.python.org/3/tutorial/controlflow.html

我查看过之前的StackOverflow问题，但大多数问题都是使用lambda，tuple或其他方法处理最多两列的

Answer 1

你的问题仍然含糊不清。您的示例没有在标头中引入第一个字段Team_Name。所以这里的索引可能只有一个，但我认为你得到了这个概念：

#read lines of text file and split into words
lines = [line.split() for line in open("test.txt", "r")]
#sort lines for different columns, numbers converted into integers to prevent lexicographical sorting
lines.sort(key = lambda x: (x[1], x[2], int(x[3])))
#writing the sorted list into another file
with open("new_test.txt", "w") as f:
    for item in lines:
        f.write(" ".join(item) + "\n")

Answer 2

您可以使用itemgetter模块中的operator执行此操作：

from operator import itemgetter

def showList(inList):
    for i in inList:
        print(i)

lines = []

with open("test.txt", "r") as infile:
    lines = [i.split() for i in infile.readlines()]
    lines = [[int(j) if j.isdigit() else j for j in i] for i in lines]
    showList(lines)
    lines = sorted(lines, key=itemgetter(1,2,3))
    print()
    showList(lines)

with open("output.txt", "w") as outfile:
    for line in lines:
        outfile.write(" ".join(str(i) for i in line) + "\n")

输出（使用showList）：

['Bears', 'Blue', 'Beartown', 15, 'Coach1']
['Bears', 'Red', 'Dogtown', 30, 'Coach6']
['Bears', 'Blue', 'Cattown', 15, 'Coach2']
['Bears', 'Red', 'Beartown', 15, 'Coach4']
['Bears', 'Blue', 'Cattown', 17, 'Coach3']
['Bears', 'Red', 'Dogtown', 9, 'Coach5']

['Bears', 'Blue', 'Beartown', 15, 'Coach1']
['Bears', 'Blue', 'Cattown', 15, 'Coach2']
['Bears', 'Blue', 'Cattown', 17, 'Coach3']
['Bears', 'Red', 'Beartown', 15, 'Coach4']
['Bears', 'Red', 'Dogtown', 9, 'Coach5']
['Bears', 'Red', 'Dogtown', 30, 'Coach6']

新文件中的输出格式：

Bears Blue Beartown 15 Coach1
Bears Blue Cattown 15 Coach2
Bears Blue Cattown 17 Coach3
Bears Red Beartown 15 Coach4
Bears Red Dogtown 9 Coach5
Bears Red Dogtown 30 Coach6

如何将具有特定顺序的三列文本文件排序到Python中的那些列？

2 个答案: