python如何写入现有txt文件中的特定行

python如何写入现有txt文件中的特定行

您可以读取文件，然后写入某些特定行。

line_to_replace = 17 #the line we want to remplacemy_file = 'myfile.txt'with open(my_file, 'r') as file:    lines = file.readlines()#now we have an array of lines. If we want to edit the line 17...if len(lines) > int(line_to_replace):    lines[line_to_replace] = 'The text you want here'with open(my_file, 'w') as file:    file.writelines( lines )