[Q] 如何忽略从文件中读取的文本的第一行[英] [Q] How to ignore the first line of the text read from a file

问题描述

Hello,

I am new to Python and have one simple question to which I cannot find
a satisfactory solution.
I want to read text line-by-line from a text file, but want to ignore
only the first line. I know how to do it in Java (Java has been my
primary language for the last couple of years) and following is what I
have in Python, but I don''t like it and want to learn the better way
of doing it.

file = open(fileName, ''r'')
lineNumber = 0
for line in file:
if lineNumber == 0:
lineNumber = lineNumber + 1
else:
lineNumber = lineNumber + 1
print line

Can anyone show me the better of doing this kind of task?

Thanks in advance.

推荐答案

On Wed, 27 Aug 2008 21:11:26 -0700, yo**************@gmail.com wrote:

I want to read text line-by-line from a text file, but want to ignore
only the first line. I know how to do it in Java (Java has been my
primary language for the last couple of years) and following is what I
have in Python, but I don''t like it and want to learn the better way of
doing it.

file = open(fileName, ''r'')
lineNumber = 0
for line in file:
if lineNumber == 0:
lineNumber = lineNumber + 1
else:
lineNumber = lineNumber + 1
print line

Can anyone show me the better of doing this kind of task?

input_file = open(filename)
lines = iter(input_file)
lines.next() # Skip line.
for line in lines:
print line
input_file.close()

Ciao,
Marc ''BlackJack'' Rintsch

On Aug 28, 6:11*am, "youngjin.mich...@gmail.com"
<youngjin.mich...@gmail.comwrote:

Hello,

I am new to Python and have one simple question to which I cannot find
a satisfactory solution.
I want to read text line-by-line from a text file, but want to ignore
only the first line. I know how to do it in Java (Java has been my
primary language for the last couple of years) and following is what I
have in Python, but I don''t like it and want to learn the better way
of doing it.

file = open(fileName, ''r'')
lineNumber = 0
for line in file:
* * if lineNumber == 0:
* * * * lineNumber = lineNumber + 1
* * else:
* * * * lineNumber = lineNumber + 1
* * * * print line

Can anyone show me the better of doing this kind of task?

Thanks in advance.

fileInput = open(filename, ''r'')
for lnNum, line in enumerate(fileInput):
if not lnNum:
continue
print line

I want to read text line-by-line from a text file, but want to ignore

only the first line. I know how to do it in Java (Java has been my
primary language for the last couple of years) and following is what I
have in Python, but I don''t like it and want to learn the better way
of doing it.

Why don''t you read and discard the first line before processing the
rest of the file?

file = open(filename, ''r'')
file.readline()
for line in file: print line,

(It works).