Perl Wide character in print问题解决

最新推荐文章于 2022-10-25 10:53:20 发布

skydreamer01

最新推荐文章于 2022-10-25 10:53:20 发布

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文章标签： character perl csv warnings encoding output

本文链接：https://blog.youkuaiyun.com/skydreamer01/article/details/5455060

本文介绍了一种在Perl中使用Text::CSV模块解析CSV文件时遇到的宽字符警告问题及解决方案。通过在程序开始处添加binmode STDOUT, ':utf8'语句，可以消除与UTF-8编码相关的警告。

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在使用Text::CSV模块解析CSV文件时遇到问题；

在开始加入binmode STDOUT, ':utf8'；语句，症状消失，整个使用CSV的代码如下：

#!/usr/bin/perl

use strict;

use Text::CSV;

binmode STDOUT, ':utf8';

my @rows;

my $csv = Text::CSV->new ( { binary => 1 } ) # should set binary attribute.

or die "Cannot use CSV: ".Text::CSV->error_diag ();

open my $fh, "<:utf8", "test.csv" or die "test.csv: $!";

while ( my $row = $csv->getline( $fh ) ) {

for (@$row) {

print $_,",";

}

print "/n";

push @rows, $row;

}

$csv->eof or $csv->error_diag();

close $fh;

以下是从网上搜索的解释

perldoc perldiag
[snip]
Wide character in %s
(W utf8) Perl met a wide character (>255) when it wasn't
expecting
one. This warning is by default on for I/O (like print). The
easiest way to quiet this warning is simply to add the ":utf8"
layer
to the output, e.g. "binmode STDOUT, ':utf8'". Another way to
turn
off the warning is to add "no warnings 'utf8';" but that is
often
closer to cheating. In general, you are supposed to
explicitly mark
the filehandle with an encoding, see open and "binmode" in
perlfunc.