def replace(file_path, pattern, subst):
file_path = os.path.abspath(file_path)
#Create temp file
fh, abs_path = mkstemp()
new_file = open(abs_path,'w')
old_file = open(file_path)
for line in old_file:
new_file.write(line.replace(pattern, subst))
#close temp file
new_file.close()
close(fh)
old_file.close()
#Remove original file
remove(file_path)
#Move new file
move(abs_path, file_path)
我有这个函数来替换文件中的字符串.但我无法找到替换找到模式的整条线的好方法.
例如,如果我想替换一行包含:“John整天努力工作”使用模式“John”,替换将是“Mike没有那么努力”.
使用我当前的函数,我将不得不在模式中写入整行以替换整行.
最佳答案 首先,您可以更改此部分:
for line in old_file:
new_file.write(line.replace(pattern, subst))
进入:
for line in old_file:
if pattern in line:
new_file.write(subst)
else:
new_file.write(line)
或者你可以让它更漂亮:
for line in old_file:
new_file.write(subst if pattern in line else line)