如何解决为什么Popen执行的子过程输出的一部分丢失了？
| 这是一个奇怪的问题。我开始在此线程上进行处理，现在它已演变为稍有不同的东西。 我正在使用Popen（）执行Perl程序\'anubadok \'。 Perl程序将其输出写入文件。这是执行此操作的Perl代码段。 4号。打印语句（在打开OUTFILE之后...）写入非英语Unicode字符（孟加拉）。我在其前面添加了3条打印行，以测试所有Unicode字符是否都正确编写。...
my $infile = shift ;
my $input = \"STDIN\" ;
if ( !$infile )
{
if (!$silent)
{
print STDERR \"Reading form STDIN; (try: anubadok --help for usage or\\n\" ;
print STDERR \"see manpage for details.)\\n\" ;
}
}
elsif ( -e $infile )
{
open ( FILE,\"<:utf8\",$infile)
|| die \"Error! Couldn\'t open \\\"$infile\\\"! Exiting.\" ;
$input = \"FILE\" ;
}
else {
print STDERR \"Error! Couldn\'t find \\\"$infile\\\"! Exiting.\\n\" ;
exit (1);
}
Initialize::check_user_anubadok_dir();
open ( OUTFILE,\">:utf8\",\"anubadok_outfile\" );
print OUTFILE \"hello\";
print OUTFILE \"হেলেছি\";
print OUTFILE \"world\";
print OUTFILE
XMLPP::xml_post_processor(
Translator::translate_in_bengali(
PoSTagger::penn_treebank_tagger(
XMLPP::xml_pre_processor(<$input>))));
close OUTFILE;
# print STDOUT
# XMLPP::xml_post_processor(
# Translator::translate_in_bengali(
# PoSTagger::penn_treebank_tagger(
# XMLPP::xml_pre_processor(<$input>))));
...
#!/usr/bin/env python
import pygtk,sys,gtk,os,subprocess,pdb
class C:
def main(self,argv=None):
gtk.main()
def __init__(self):
# Main window
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.set_border_width(2)
self.window.set_position(gtk.WIN_POS_CENTER)
self.window.connect(\"destroy\",self._destroy_window)
# TextView
self.v = gtk.TextView()
self.v.set_name(\"v\")
self.vsw = gtk.ScrolledWindow()
self.vsw.set_policy(gtk.POLICY_AUTOMATIC,gtk.POLICY_AUTOMATIC)
self.vsw.add(self.v)
# TextView
self.v1 = gtk.TextView()
self.v1.set_name(\"v1\")
self.v1sw = gtk.ScrolledWindow()
self.v1sw.set_policy(gtk.POLICY_AUTOMATIC,gtk.POLICY_AUTOMATIC)
self.v1sw.add(self.v1)
# TreeView
self.model = gtk.ListStore(str,str)
self.tv = gtk.TreeView(self.model)
self.tv.connect(\"row-activated\",self._f,self.v)
self.tv.connect(\"row-activated\",self.v1)
self.c = gtk.CellRendererText()
self.c1 = gtk.CellRendererText()
self.col = gtk.TreeViewColumn(\"C\",self.c,text=0)
self.col1 = gtk.TreeViewColumn(\"C1\",self.c1,text=1)
self.tv.append_column(self.col)
self.tv.append_column(self.col1)
self.tvsw = gtk.ScrolledWindow()
self.tvsw.set_policy(gtk.POLICY_AUTOMATIC,gtk.POLICY_AUTOMATIC)
self.tvsw.add(self.tv)
self.fill_model(self.model)
# Layout
self.rbox = gtk.VBox(False,0)
self.rbox.pack_start(self.vsw,False,0)
self.rbox.pack_start(self.v1sw,0)
self.box = gtk.HBox(False,0)
self.box.pack_start(self.tvsw,0)
self.box.pack_start(self.rbox,0)
self.window.add(self.box)
self.window.show_all()
def fill_model(self,model):
self.dbg(\"fill_model()\")
model.clear()
fd = open(\"file\",\"r\"); rows = fd.readlines(); fd.close()
for l in rows:
a = l.split()
model.append([l[0],l[1]])
return
def _f(self,tview,path,column,textview):
self.dbg(\"_f()\")
tsel = tview.get_selection()
model,iter = tsel.get_selected()
buf = textview.get_buffer()
buf.set_text(\"\")
if(textview.get_name() == \"v\"):
self.dbg(\"_f():v\")
buf.set_text(\"hello\")
elif(textview.get_name() == \"v1\"):
self.dbg(\"_f():v1\")
x = \"hello\"
t = self.g(x)
buf.set_text(t)
return
def run(self,cmd):
self.dbg(\"run()\")
\"\"\"
- Run command and return stdout as first argument of a
tuple and stderr as the second argument of the tuple.
- Returns None on error.
\"\"\"
try:
p = subprocess.Popen(cmd,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
p.wait()
if p.returncode:
print \"failed with code: %s\" % str(p.returncode)
return p.communicate()
except OSError:
print \"OSError\"
def g(self):
# pdb.set_trace()
self.dbg(\"g()\")
p = self.run([\"/home/rup/ir/utils/anubadok-0.2.1/bin/anubadok\",\"file1\"])
return p[0]
def _destroy_window(self,widget,data = None):
self.dbg(\"_destroy_window()\")
gtk.main_quit()
return
def dbg(self,msg):
sys.stderr.write(\"dbg: %s\\n\" % msg)
if __name__ == \"__main__\":
ui = C()
ui.main()
解决方法
Perl和Python都对LANG等环境变量敏感。图形化的启动器和终端窗口通常将不同的值传递给其子级。
我尝试使用ASCII输入和输出进行测试，打印STDERR以查看是否存在警告，并记录每个进程的环境。
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