如何防止line.replace删除多余的行？

Question

我想消除文件中的一行，但是当我执行line.replace函数时，它将替换不应替换的内容。

我尝试使用line.replace删除“ SCOPE1EXPRESSION”行，但它删除了我想保留的其他行。

输入文件如下：

SCOPE1EXPRESSION
InDifferentialPairClass'DIFF100'
TOPLAYER_PREFGAP
6.2992mil
BOTTOMLAYER_PREFGAP
6.2992mil
SCOPE1EXPRESSION
InDifferentialPairClass'DIFF90'
TOPLAYER_PREFGAP
4.4882mil
BOTTOMLAYER_PREFGAP
4.4882mil

然后我尝试使用line.replace（“ SCOPE1EXPRESSION”，“”）将其删除：

'''
infile = open(('All_Rules1.txt'),'r')
outfile = open('All_Rules2.txt','w+')
for line in infile:
    line = line.replace("SCOPE1EXPRESSION","")
    if pattern.search(line):
        outfile.write(line)
infile.close()
outfile.close()
sys.stdout.flush()
'''

结果是：

InDifferentialPairClass'DIFF100'
TOPLAYER_PREFGAP
BOTTOMLAYER_PREFGAP
InDifferentialPairClass'DIFF90'
TOPLAYER_PREFGAP
BOTTOMLAYER_PREFGAP

如何防止它删除多余的行？

我希望仅 删除“ SCOPE1EXPRESSION”。