从文件创建键值对(Creating key value pairs from file)

从文件创建键值对(Creating key value pairs from file) python

我有以下脚本读取整个file.bin文件，如何修改以读取文件的前1000行？ 谢谢。

with open("file.bin","r") as text: for line in text: if line.startswith('MH =') or line.startswith('MN ='): value, key = line.strip().split('=') res[key] = value if num < 1000: print '%s : %s' % (key, value) num = num + 1

I have the following script that reads the entire file.bin file, how do I amend to read the first 1000 lines of the file instead? Thanks.

with open("file.bin","r") as text: for line in text: if line.startswith('MH =') or line.startswith('MN ='): value, key = line.strip().split('=') res[key] = value if num < 1000: print '%s : %s' % (key, value) num = num + 1

最满意答案

当你的数量达到1000时，打破;

ctr = 0; for line in text: ctr = ctr + 1 if ctr > 1000: break if line.startswith('MH =') or line.startswith('MN ='): value, key = line.strip().split('=') res[key] = value if num < 1000: print '%s : %s' % (key, value) num = num + 1

As your num reaches 1000, break;

ctr = 0; for line in text: ctr = ctr + 1 if ctr > 1000: break if line.startswith('MH =') or line.startswith('MN ='): value, key = line.strip().split('=') res[key] = value if num < 1000: print '%s : %s' % (key, value) num = num + 1