python 文件读取循环问题

Question

尝试从 txt 文件中获取数据时遇到问题。 解决方案肯定会很简单，但无论如何我认为我需要你的帮助。 现在它像'123 123456'那样打印，但我想像'123 456'一样打印它，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)

OUTPUT

ear
hello
hello
hello
rea

5
ear
hello
hello
hello
rea
ear
world
world
rea

9

预期 OUTPUT

ear
hello
hello
hello
rea

5
ear
world
world
rea

4

Answer 1

• 你需要重新初始化data

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 = ''

Output：

ear
hello
hello
hello
rea

5
ear
world
world
rea

9

• 注意：这不会打印 4. 从 output 看起来您想要打印数据的长度。 对于那部分，您的逻辑是错误的。

Answer 2

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 = ''