python - 阅读某些单词之间的内容并打印出中间的内容。 (Python)

Question

你好，我对 python 编程相当陌生，我想知道如何修复我的代码，以允许我只在普通文本文档中的两个字符串之间读取。例如，假设我有以下内容

unimportant data  
unimportant data   
unimportant data 
... ... ...   
First string     #I want to print out starting from this line                     
Important data
Important data
Important data
Important data  
Last String       #Last line I dont want to print this line.
unimportant data  
unimportant data   
unimportant data 
unimportant data  
unimportant data   
unimportant data 

到目前为止，我已经能够创建一个简单的文件 I/O 来读取一行。

data_file = open("test.txt", "r")

for line in data_file:
    if re.match("(.*)First String(.*)", line):
        print(line)

但是这只打印出第一行。

任何提示或帮助将非常感谢。

Answer 1

go = False
start = "First string"
end = "Last String"

with open('path/to/file') as infile:
    for line in infile:
        line = line.strip()
        if line == start: go = True
        elif line == end:
            go = False
            continue
        if go: print(line)

如果您只是寻找关键字，而不是匹配整行:

go = False
start = "First string"
end = "Last String"

with open('path/to/file') as infile:
    for line in infile:
        line = line.strip()
        if start in line: go = True
        elif end in line:
            go = False
            continue
        if go: print(line)