解释一下Linux中 awk '$NF == "" {print $2, $1}' annuaire_temp.txt

这是一个awk命令的脚本，它用于处理文本文件annuaire_temp.txt。下面是脚本中各部分的解释：

- awk是一个文本处理命令，用于逐行处理输入文件并根据指定规则进行操作。
- '$NF == "" {print $2, $1}'是awk的操作规则，它包含两部分：
- $NF是awk内置变量，表示每一行的最后一个字段。这里的$NF == ""表示只选择最后一个字段为空的行。
- {print $2, $1}表示对于符合前面条件的每一行，输出该行的第二个字段和第一个字段，中间用空格分隔。

因此，该脚本的作用是从annuaire_temp.txt中选择最后一个字段为空的行，并输出这些行的第二个字段和第一个字段，中间用空格分隔。

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用Python改写以下代码for i in $(ls ${contact_dir});do #temp: 1acb_E-by #temp1: 1acb_E temp=$(echo ${i%-*}) temp1=$(echo ${temp%-*}) awk '{if(!a[$6]++) print $6}' ${contact_dir}/${i} >${contact_dir}/${temp}-res.txt for j in $(cat ${contact_dir}/${temp}-res.txt);do cat ${contact_dir}/${temp}-res.vor | awk '$6=='$j'{print $0}' >${patch_dir}/${temp}_patch_${j}.txt value=0 for l in $(awk '{print $2}' ${patch_dir}/${temp}_patch_${j}.txt);do #echo $l res=$(awk '{print $2}' ${surface_dir}/${temp1}_surface.txt) #echo $res if ( echo ${res} | grep -q $l);then value=1 fi done #patch_abs for k in $(awk '{print $2}' ${patch_dir}/${temp}_patch_${j}.txt);do cat ${rsa_dir}/${temp1}_abs.txt | awk '$3=='$k'{print $0}' >>${patch_abs_dir}/${temp1}_patch_${j}.txt done for m in $(awk '{print $2}' ${patch_dir}/${temp}_patch_${j}.txt);do for n in $(awk '{print $2}' ${patch_dir}/${temp}_patch_${j}.txt);do if [ $n -ne $m ];then cat ${contact_dir}/${temp}-res.vor | awk '$2=='$m' && $6=='$n' {print $0}' >>${patch_contact_dir}/${temp1}_patch_${j}.txt fi done done #### abs=$(awk '{sum += $4};END {print sum}' ${patch_abs_dir}/${temp1}_patch_${j}.txt) con=$(awk '{sum += $9};END {print sum}' ${patch_contact_dir}/${temp1}_patch_${j}.txt) psaia=$(echo "$abs*$con" | bc) echo $j $abs $con $psaia >>${patch_psaia_dir}/${temp1}.txt #echo $j $con >>${patch_psaia_dir}/${temp1}_con.txt #### #echo $value if [ $value = 0 ];then #echo ${patch_dir}/${temp}_patch_${j} rm ${patch_dir}/${temp}_patch_${j}.txt fi done done

以下是用 Python 重写的代码：

import os

contact_dir = './contact_dir'
patch_dir = './patch_dir'
surface_dir = './surface_dir'
rsa_dir = './rsa_dir'
patch_abs_dir = './patch_abs_dir'
patch_contact_dir = './patch_contact_dir'
patch_psaia_dir = './patch_psaia_dir'

for i in os.listdir(contact_dir):
    # temp: 1acb_E-by
    # temp1: 1acb_E
    temp = i.split('-')[0]
    temp1 = temp.split('-')[0]
    
    with open(f'{contact_dir}/{i}') as f:
        contacts = f.read().splitlines()
    
    unique_contacts = list(set([c.split()[5] for c in contacts]))
    
    with open(f'{contact_dir}/{temp}-res.txt', 'w') as f:
        f.write('\n'.join(unique_contacts))
    
    for j in unique_contacts:
        with open(f'{contact_dir}/{temp}-res.vor') as f:
            patch_j = [line for line in f if line.split()[5] == j]
        
        value = 0
        for l in patch_j:
            res = open(f'{surface_dir}/{temp1}_surface.txt').read()
            if l.split()[1] in res:
                value = 1
        
        # patch_abs
        with open(f'{patch_abs_dir}/{temp1}_patch_{j}.txt', 'w') as f:
            for k in patch_j:
                with open(f'{rsa_dir}/{temp1}_abs.txt') as f2:
                    patch_abs = [line for line in f2 if line.split()[2] == k.split()[1]]
                    f.write('\n'.join(patch_abs))
        
        # patch_contact
        with open(f'{patch_contact_dir}/{temp1}_patch_{j}.txt', 'w') as f:
            for m in patch_j:
                for n in patch_j:
                    if n.split()[1] != m.split()[1]:
                        with open(f'{contact_dir}/{temp}-res.vor') as f2:
                            patch_contact = [line for line in f2 if line.split()[1] == m.split()[1] and line.split()[5] == n.split()[5]]
                            f.write('\n'.join(patch_contact))
        
        # psaia
        abs_sum = sum(float(line.split()[3]) for line in open(f'{patch_abs_dir}/{temp1}_patch_{j}.txt'))
        con_sum = sum(float(line.split()[8]) for line in open(f'{patch_contact_dir}/{temp1}_patch_{j}.txt'))
        psaia = abs_sum * con_sum
        with open(f'{patch_psaia_dir}/{temp1}.txt', 'a') as f:
            f.write(f'{j} {abs_sum} {con_sum} {psaia}\n')
        
        if value == 0:
            os.remove(f'{patch_dir}/{temp}_patch_{j}.txt')

注意，这里只是根据原始代码的语法和意思进行的重写，可能还需要根据实际情况进行调整。

awk '{if(length($NF) != 10) print $1,$2}' annuaire_sed.txt

您的问题是一个 Linux 的命令行问题，这是一条使用 awk 命令的命令，它的作用是从文件 annuaire_sed.txt 中读取数据，并将最后一列的长度不为10的行的第一列和第二列打印出来。具体解释如下：

- awk：命令本身，用于处理文本文件并生成报告。
- '{if(length($NF) != 10) print $1,$2}'：命令的操作部分，其中 $NF 表示最后一列，length 函数用于计算字符串的长度，如果最后一列的长度不等于 10，则打印第一列和第二列。
- annuaire_sed.txt：输入文件的名称。

因此，这个命令会从文件 annuaire_sed.txt 中读取数据，并打印出最后一列的长度不为 10 的行的第一列和第二列。