python文件读取循环问题

Question

在尝试从txt文件中获取数据时，我遇到了一个问题。解决办法肯定很简单，但无论如何，我想我需要你的一点帮助。现在它打印的像'123 123456'，但我想打印它像'123 456'，有什么想法吗？

输入

asd
ear
hello
hello
hello
rea
ear
world
world
rea
zxczxc

代码

check = False
data = ''
start = 'ear'
end = 'rea'

with open('bear.txt', 'r') as rf:
    lines = rf.readlines()
    for i,x in enumerate(lines):
        if start in x:
            check = True
        if check:
            data += str(x)
        if end in x:
            check = False
            print(data)
            print(i)

输出

ear
hello
hello
hello
rea

5
ear
hello
hello
hello
rea
ear
world
world
rea

9

预期产出

ear
hello
hello
hello
rea

5
ear
world
world
rea

4

Answer 1

check = False
data = ''
start = 'ear'
end = 'rea'

with open('bear.txt', 'r') as rf:
    lines = rf.readlines()
    for x in lines:
        if start in x:
            check = True
        if check:
            data += str(x)
        if end in x:
            check = False
            print(data)

            # Count of data that split by `\n`
            # However, there is one extra `\n` so minus 1.
            print(len(data.split("\n")) - 1)

            # If it is not initialized, the contents will remain intact
            data = ''

Answer 2

需要重新初始化data的

check = False
data = ''
start = 'ear'
end = 'rea'

with open('temp.txt', 'r') as rf:
    lines = rf.readlines()
    for i,x in enumerate(lines):
        if start in x:
            check = True
        if check:
            data += str(x)
        if end in x:
            check = False
            print(data)
            print(i)
            data = ''

输出：

ear
hello
hello
hello
rea

5
ear
world
world
rea

9

• NOTE：--它不会打印4。从输出结果看，它看起来像是要打印数据的长度。对于这部分，您的逻辑是错误的。