如何按升序对文件进行排序？

Question

我有以下代码来加入文件并尝试在将结果写入最终的 .txt 文件之前按升序对文件进行排序。但它显示字符串对象没有属性。

temp_list = ''
with open('temp.txt') as f:
out = [x for x in f.read().split("\n") if x.strip() != ""] 
for line1, line2 in list(zip(out, out[1:]))[::2]:
    line1 = line1 + ';'
    line2 = line2.split(' ')
    line = ''
    for x in range(1,len(line2)):
        line = line + line2[x] + ' '
    line = line[:-1] + '.' 
    temp_list += " ".join([line1, line]) + '\n'
    temp_list.sort()

with open('new.txt' , 'w') as file:
file.write(temp_list)

临时文件

line1 Ron likes apple; mango
line5 Ana likes lyche; apple
line21 Tyson likes football; VolleyBall
line6 Mike likes singing; dancing
line245 Stephen likes playing; sleeping
line95 Rose likes dancing; singing

行的顺序应该是这样的

line1
line5
line6
line21
line95
line245

但不喜欢

line1
line21
line245
line5
line6
line95

任何帮助将不胜感激..谢谢

Answer 1

我有这个办法：

with open('temo.txt','r') as f:
    l1 = [l.lstrip('line').split(' ',1) for l in f.readlines()]
    l2 = sorted([[int(a),b.strip()] for a,b in l1])
    for s in l2:
        print(f"line{s[0]} {s[1]}")

输出：

line1 Ron likes apple; mango
line5 Ana likes lyche; apple
line6 Mike likes singing; dancing
line21 Tyson likes football; VolleyBall
line95 Rose likes dancing; singing
line245 Stephen likes playing; sleeping

对于cmets中提到的打印错误，试试这个：

print("line{} {}".format(s[0],s[1]))

Answer 2

import re
with open("temp.txt", "r") as infile, open("new.txt", "w") as outfile:
    lines = infile.readlines()
    if not lines[-1].endswith("\n"):
        lines[-1] = lines[-1] + "\n"
    lines.sort(key=lambda x:int(re.findall(r"^[a-zA-Z]+(\d+)$", x.split()[0])[0]))
    outfile.writelines(lines)

你可以用re试试这个。如果格式是固定的，这将起作用。

Input text

Line1 Ron likes apple; mango line5 Ana likes lyche; apple line21 Tyson play football; VolleyBall line6 .......................... line245 ....................... line95 ............ line11 ......... line12 .......... line20 ..........

Output text

Line1 Ron likes apple; mango line5 Ana likes lyche; apple line6 .......................... line11 ......... line12 .......... line20 .......... line21 Tyson play football; VolleyBall line95 ............ line245 .......................

Answer 3

我没有真正的解决方案，但有一个解决方法。我会将所有行保存在字典中，然后只写这几行：

def sort_lines(your_dictionary):
    temp_list = []
    for i in range (1, len(your_dictionary)+1):
        temp_list.append(your_dictionary[i])
    return temp_list

如果您不确定您是否拥有从 1 到最高的每个数字，只需稍微更改一下即可：

def sort_lines(your_dictionary):
    temp_list = []
    for i in range (1, len(your_dictionary)+1):
        try:
            temp_list.append(your_dictionary[i])
        except:
            pass
    return temp_list

Answer 4

你也许可以使用排序

    temp = [
        "Line1 Ron likes apple; mango",
        "line5 Ana likes lyche; apple",
        "line21 Tyson play football; VolleyBall",
        "line6 ..........................",
        "line245 .......................",
        "line95 ............",
    ]


    def sort_fn(a):
        idx = a.find(" ")
        key_a = int(a[4:idx])
        return key_a

    sort = sorted(temp, key=sort_fn)
    print(sort)