subprocess.popen问题 [英] subprocess.popen question

问题描述

我正在尝试修改一个编程示例，我想出了

两个问题......首先是我似乎无法传递

外部命令的参数（我已经能够用

旧模块和cmd是我希望尝试的命令）所有输出

似乎是返回为一行（至少当我在

spe中运行程序时）。


导入子流程
来自os导入系统的


cmd =""" gawk -f altertime.awk -v time_offset = 4 -v

outfile =" testdat.sco" " i1.sco" ""

＃subprocess.Popen。

last_line = subprocess.Popen（[''gawk.exe'']，

stdout = subprocess.PIPE）.communicate（）[0]

xx = 0

for last_line中的行：

xx = xx + 1

如果xx< 2：

打印行

print str（xx）

I am trying to modify a programming example and I am coming up with
two problems... first is that I can''t seem to pass along the
arguments to the external command (I have been able to do that with
the old module and cmd is the command I wish to try) all the output
seems to be returned as one line (at least when I run the program in
spe).

import subprocess
from os import system
cmd = """gawk -f altertime.awk -v time_offset=4 -v
outfile="testdat.sco" "i1.sco" """
#subprocess.Popen.
last_line = subprocess.Popen([''gawk.exe''],
stdout=subprocess.PIPE).communicate()[0]
xx = 0
for line in last_line:
xx = xx + 1
if xx < 2:
print line
print str(xx)

推荐答案

En Wed，2007年6月20日12:27:47 -0300， Er ********* @ msn。 com

< Er ********* @msn.comescribió：

En Wed, 20 Jun 2007 12:27:47 -0300, Er*********@msn.com
<Er*********@msn.comescribió:

我正在尝试修改一个编程示例，我想出了两个问题......首先是我无法将

参数传递给外部命令（我已经能够用

旧模块和cmd是我想要尝试的命令）所有输出

似乎作为一行返回（至少当我在

spe）中运行程序时。


导入子进程
来自os导入系统的


cmd =""" gawk -f altertime.awk -v time_offset = 4 -v

outfile =" testdat.sco" " i1.sco" ""

＃subprocess.Popen。

last_line = subprocess.Popen（[''gawk.exe'']，

stdout = subprocess.PIPE）.communicate（）[0]

I am trying to modify a programming example and I am coming up with
two problems... first is that I can''t seem to pass along the
arguments to the external command (I have been able to do that with
the old module and cmd is the command I wish to try) all the output
seems to be returned as one line (at least when I run the program in
spe).

import subprocess
from os import system
cmd = """gawk -f altertime.awk -v time_offset=4 -v
outfile="testdat.sco" "i1.sco" """
#subprocess.Popen.
last_line = subprocess.Popen([''gawk.exe''],
stdout=subprocess.PIPE).communicate()[0]

您构建看似所需的命令行，但执行

gawk.exe代替。

事先更好地拆分参数：

cmd = [" gawk"，" -f"，" altertime.awk"，" ; -v"，" time_offset = 4"，" -v"，

" outfile = testdat.sco"，" i1.sco"]

现在，你想对输出做什么？逐行打印？

output = subprocess.Popen（cmd，stdout = subprocess.PIPE）.communicate（）[0]

lines = output.splitlines（）

换行：

打印行

-

Gabriel Genellina

6月20日下午1:46，Gabriel Genellina < gagsl -... @ yahoo.com.ar>

写道：

On Jun 20, 1:46 pm, "Gabriel Genellina" <[e-mail]>
wrote:

En Wed，2007年6月20日12:27： 47 -0300，Eric_Dex ... @ msn.com

< Eric_Dex ... @msn.comescribió：

En Wed, 20 Jun 2007 12:27:47 -0300, [e-mail]
<[e-mail]ó:

我正在尝试修改一个编程示例，我想出了两个问题......首先是我无法将

参数传递给外部命令（我已经能够用

旧模块和cmd是我想要尝试的命令）所有输出

似乎作为一行返回（at至少当我在

spe中运行程序时。

I am trying to modify a programming example and I am coming up with
two problems... first is that I can''t seem to pass along the
arguments to the external command (I have been able to do that with
the old module and cmd is the command I wish to try) all the output
seems to be returned as one line (at least when I run the program in
spe).

导入子流程
来自os导入系统的


cmd =""" gawk -f altertime.awk -v time_offset = 4 -v

outfile =" testdat.sco" " i1.sco" ""

＃subprocess.Popen。

last_line = subprocess.Popen（[''gawk.exe'']，

stdout = subprocess.PIPE）.communicate（）[0]

import subprocess
from os import system
cmd = """gawk -f altertime.awk -v time_offset=4 -v
outfile="testdat.sco" "i1.sco" """
#subprocess.Popen.
last_line = subprocess.Popen([''gawk.exe''],
stdout=subprocess.PIPE).communicate()[0]

你构建看似所需的命令行，但执行

gawk.exe代替。

事先更好地拆分参数：

cmd = [" gawk"，" -f"，" altertime.awk"，" ; -v"，" time_offset = 4"，" -v"，

" outfile = testdat.sco"，" i1.sco"]

现在，你想对输出做什么？逐行打印？

output = subprocess.Popen（cmd，stdout = subprocess.PIPE）.communicate（）[0]

lines = output.splitlines（）

换行：

打印行

-

Gabriel Genellina

You build what appears to be the desired command line, but execute
gawk.exe instead.
Better split the arguments beforehand:
cmd = ["gawk", "-f", "altertime.awk", "-v", "time_offset=4", "-v",
"outfile=testdat.sco", "i1.sco"]
Now, what do you want to do with the output? Printing it line by line?
output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()[0]
lines = output.splitlines()
for line in lines:
print line

--
Gabriel Genellina

我有一个测试我用cmd替代gawk而且一切都是

代替gawk ..我没有尝试过什么你已经列出了（我是准备去上班的
所以可能要等到tommorow才能尝试

吧）谢谢你的帮助

I had one test where I had cmd in place of gawk and one everything was
in place of gawk.. I haven''t tried what you have listed yet (I am
getting ready to go to work so may have to wait until tommorow to try
it) THanks for the help

6月20日下午1:46，Gabriel Genellina < gagsl -... @ yahoo.com.ar>

写道：

On Jun 20, 1:46 pm, "Gabriel Genellina" <[e-mail]>
wrote:

En Wed，2007年6月20日12:27： 47 -0300，Eric_Dex ... @ msn.com

< Eric_Dex ... @msn.comescribió：

En Wed, 20 Jun 2007 12:27:47 -0300, [e-mail]
<[e-mail]ó:

我正在尝试修改一个编程示例，我想出了两个问题......首先是我无法将

参数传递给外部命令（我已经能够用

旧模块和cmd是我想要尝试的命令）所有输出

似乎作为一行返回（at至少当我在

spe中运行程序时。

I am trying to modify a programming example and I am coming up with
two problems... first is that I can''t seem to pass along the
arguments to the external command (I have been able to do that with
the old module and cmd is the command I wish to try) all the output
seems to be returned as one line (at least when I run the program in
spe).

导入子流程
来自os导入系统的


cmd =""" gawk -f altertime.awk -v time_offset = 4 -v

outfile =" testdat.sco" " i1.sco" ""

＃subprocess.Popen。

last_line = subprocess.Popen（[''gawk.exe'']，

stdout = subprocess.PIPE）.communicate（）[0]

import subprocess
from os import system
cmd = """gawk -f altertime.awk -v time_offset=4 -v
outfile="testdat.sco" "i1.sco" """
#subprocess.Popen.
last_line = subprocess.Popen([''gawk.exe''],
stdout=subprocess.PIPE).communicate()[0]

你构建看似所需的命令行，但执行

gawk.exe代替。

事先更好地拆分参数：

cmd = [" gawk"，" -f"，" altertime.awk"，" ; -v"，" time_offset = 4"，" -v"，

" outfile = testdat.sco"，" i1.sco"]

现在，你想对输出做什么？逐行打印？

output = subprocess.Popen（cmd，stdout = subprocess.PIPE）.communicate（）[0]

lines = output.splitlines（）

换行：

打印行

-

Gabriel Genellina

You build what appears to be the desired command line, but execute
gawk.exe instead.
Better split the arguments beforehand:
cmd = ["gawk", "-f", "altertime.awk", "-v", "time_offset=4", "-v",
"outfile=testdat.sco", "i1.sco"]
Now, what do you want to do with the output? Printing it line by line?
output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()[0]
lines = output.splitlines()
for line in lines:
print line

--
Gabriel Genellina

C：\ index_tracker \ pipe1.py

Traceback（最近一次调用最后一次）：

文件" C：\dex_tracker \pipe1.py"，第14行，

last_line = subprocess.Popen（[cmd]，

stdout = subprocess.PIPE）.communicate （）[0]

文件C：\Python25 \lib \ subprocess.py，第593行，在__init__

errread，errwrite）

文件" C：\Python25 \lib \ subprocess.py"，第793行，在_execute_child中

startupinfo）

WindowsError：[错误2]系统无法找到指定的文件

脚本已终止。


我可以将其作为批处理文件写出然后运行但是这是一个凌乱

hack。 。

C:\dex_tracker\pipe1.py
Traceback (most recent call last):
File "C:\dex_tracker\pipe1.py", line 14, in
last_line = subprocess.Popen([cmd],
stdout=subprocess.PIPE).communicate()[0]
File "C:\Python25\lib\subprocess.py", line 593, in __init__
errread, errwrite)
File "C:\Python25\lib\subprocess.py", line 793, in _execute_child
startupinfo)
WindowsError: [Error 2] The system cannot find the file specified
Script terminated.

I can write it out as a batch file and then run it but that is a messy
hack..

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