Question

我有一个50,000行的文件。所有行均采用以下形式：

A，B

，依此类推... 我想编辑该文件（甚至更好地创建一个新文件），以便最终我的文本文件如下所示：

A

...

基本上删除和。如何以最有效的方式做到这一点？

   # Create a new file for the new lines to be appended to

   f = open("file.txt", "r")
      for line in f:
          # Take the A,B form and send only the A to a new file

谢谢

Answer 1

快速而肮脏的python脚本，但是...

# Open the file as read
f = open("text.txt", "r+")
# Create an array to hold write data
new_file = []
# Loop the file line by line
for line in f:
  # Split A,B on , and use first position [0], aka A, then add to the new array
  only_a = line.split(",")
  # Add
  new_file.append(only_a[0])
# Open the file as Write, loop the new array and write with a newline
with open("text.txt", "w+") as f:
  for i in new_file:
    f.write(i+"\n")

在python中更改文本文件的每一行

1 个答案: