删除2个具体字符串之间的行的Python脚本

我编写了一个脚本，它读取一个文本文件，如下所示

*NODE
100000,1144.,-447.2639,339.0315
100001,1144.,-454.7716,342.956
100003,1144.,-448.2677,343.6241
100004,1144.,-454.8527,338.5432
*ELEMENT, TYPE=C3D6
228888,103103,103111,106773,186164,186165,196339
228889,103111,103232,106773,186165,186184,196339
228890,106773,106911,106912,196339,196457,196453

只写

228888,103103,103111,106773,186164,186165,196339
228889,103111,103232,106773,186165,186184,196339
228890,106773,106911,106912,196339,196457,196453

但我真的想让它写下来

*ELEMENT, TYPE=C3D6
228888,103103,103111,106773,186164,186165,196339
228889,103111,103232,106773,186165,186184,196339
228890,106773,106911,106912,196339,196457,196453

下面是我写的代码

with open('shell.txt', 'r') as oldfile, open('new_shell.txt', 'w') as newfile:
    for line in oldfile:
        if writing:
            if "*NODE" in line:
                writing = False
            else:
                newfile.write(line)
        elif "*ELEMENT" in line:
            writing = True
newfile.write

---

您没有写入包含*元素的行。但我建议通常使用regex/一些shell脚本来完成所有这些操作。

在第行中找到“*元素”时，添加一个额外的

写入（行）

# init conditions
writing = False

with open('shell.txt', 'r') as oldfile, open('new_shell.txt', 'w') as newfile:
    for line in oldfile:
        if writing:
            if "*NODE" in line:
                writing = False
            else:
                newfile.write(line)
        elif "*ELEMENT" in line:
            newfile.write(line)
            writing = True

newfile.write

---

然后您只需要

。在以
“*元素”
开头的行中写入
，当然可以吗？在这种情况下，请使用您的条件句。例如，将
newfile.write（line）
放在条件句末尾的某个地方，然后稍微调整一下代码。只需查看旧文件，直到找到
*元素，然后再编写后面的所有内容。
# init conditions
writing = False

with open('shell.txt', 'r') as oldfile, open('new_shell.txt', 'w') as newfile:
    for line in oldfile:
        if writing:
            if "*NODE" in line:
                writing = False
            else:
                newfile.write(line)
        elif "*ELEMENT" in line:
            newfile.write(line)
            writing = True

newfile.write