多读取同一文件Python的多行 [英] Read multiple times lines of the same file Python
问题描述
我正在使用这种基本的方式:
$ pre $ 用open(name,'r +')作为文件:
用于文件中的行:
#做某事与行
而且工作正常,但是如果我想每次迭代第二行时,仍然打开我的文件:
以open(name,'r +')作为文件:
用于文件中的行:
#做一些行
作为文件中的行:
#做一些行,第二次
然后它不起作用,我需要打开,然后关闭,然后再打开我的文件,使其工作。
打开(名称,'r +')作为文件:
作为文件中的行:
#做与行
打开(名称,'r +')文件:
在文件中的行:
#做一些行
谢谢为解答!
使用 file.seek()跳转到文件中的特定位置。但是,想想是否有必要再次通过文件。也许有更好的选择。
以open(name,'r +')作为文件:
for line in文件:
#做一些行
file.seek(0)
行中的文件:
#做某些行,第二次
I'm trying to read lines of some files multiple times in Python.
I'm using this basic way :
with open(name, 'r+') as file:
for line in file:
# Do Something with line
And that's working fine, but if I want to iterate a second time each lines while I'm still with my file open like :
with open(name, 'r+') as file:
for line in file:
# Do Something with line
for line in file:
# Do Something with line, second time
Then it doesn't work and I need to open, then close, then open again my file to make it work.
with open(name, 'r+') as file:
for line in file:
# Do Something with line
with open(name, 'r+') as file:
for line in file:
# Do Something with line
Thanks for answers !
Use file.seek() to jump to a specific position in a file. However, think about whether it is really necessary to go through the file again. Maybe there is a better option.
with open(name, 'r+') as file:
for line in file:
# Do Something with line
file.seek(0)
for line in file:
# Do Something with line, second time
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