如何在Python中获取当前打开的文件行?
Python不直接支持此功能。您可以为其编写包装器类。例如,
class FileLineWrapper(object): def __init__(self, file): self.f = file self.curr_line = 0 def close(self): return self.f.close() def readline(self): self.curr_line += 1 return self.f.readline() # to allow using in 'with' statements def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): self.close()
并将上面的代码用作:
f = FileLineWrapper(open("my_file", "r")) f.readline() print(f.line)
这将给出输出:1
如果仅使用readline方法,还有其他方法可以跟踪行号。例如,
f=open("my_file", "r") for line_no, line in enumerate(f): print line_no f.close()