替换2d python列表中的字符串

Question

我正在以文本文件的形式读取行，然后通过空格分隔这些行，并给出了一个2d列表。嵌入式数组中的某些字符串包含我试图用str.replace过滤掉的垃圾，但它不起作用。

import os 

infile = 'CMULEX.txt' 

data = [] 
with open(infile, 'r') as f: 
    read_data = f.readlines() 

    for row in read_data[:5]: 
     split_line = (row.split()) 
     data.append(split_line) 

for line in data[:5]: 
    for wd in line: 
     wd = wd.replace('Coda', '') 

Answer 1

wd是一个局部变量。这不是一个返回列表的“指针”。列表理解似乎是这里的优雅的解决方案：

for row in read_data[:5]: 
    split_line = (row.split()) 
    data.append([wd.replace("Coda", "") for wd in split_line]) 

Answer 2

For line in data[:5]: 
    line[:] = [ '' if x == 'Coda' else x for x in line]