Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
181 views
in Technique[技术] by (71.8m points)

Python readline() is not reading a line with single space

I am reading a text file using readline(). My file contains below content with a space at second line:

!

"
#
$
%
& 

When I print read values using-

print("'%s'
" % iso5_char)

It prints-

'!'

''

'"'

'#'

'$'

'%'

'&'

It seems that readline() not reading the 'space' at second line.

I am using python for the first time. I have python-3.5 installed. What is wrong I am doing here? Why is space not read?

UPDATE: Screenshot of the file i amreading:

enter image description here

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Based on a comment to the original question, you are explicitly stripping out the space with this expression:

iso5_char.rstrip()

From the documentation for rstrip:

Return a copy of the string with trailing characters removed. If chars is omitted or None, whitespace characters are removed. If given and not None, chars must be a string; the characters in the string will be stripped from the end of the string this method is called on.

In this context, "whitespace" refers to spaces, tabs, newlines, carriage returns, formfeeds, and vertical tabs.

If your intent with rstrip is to only strip trailing newlines, you can pass a newline to the rstrip command:

iso5_char.rstrip('
')

Or, you can simply chop off the last character since it's safe to assume it's a newline:

iso5_char[:-1]

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...