Linux 使用参数从 bash 调用 Python 脚本
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Call Python script from bash with argument
提问by Jimmy
I know that I can run a python script from my bash script using the following:
我知道我可以使用以下命令从我的 bash 脚本运行 python 脚本：
python python_script.py
But what about if I wanted to pass a variable / argument to my python script from my bash script. How can I do that?
但是，如果我想从我的 bash 脚本将一个变量/参数传递给我的 python 脚本呢？我怎样才能做到这一点？
Basically bash will work out a filename and then python will upload it, but I need to send the filename from bash to python when I call it.
基本上bash会计算出一个文件名，然后python会上传它，但是当我调用它时我需要将文件名从bash发送到python。
采纳答案by duckman_1991
To execute a python script in a bash script you need to call the same command that you would within a terminal. For instance
要在 bash 脚本中执行 python 脚本，您需要调用与在终端中相同的命令。例如
> python python_script.py var1 var2
To access these variables within python you will need
要在 python 中访问这些变量，您需要
import sys
print sys.argv[0] # prints python_script.py
print sys.argv[1] # prints var1
print sys.argv[2] # prints var2
回答by NPE
Use
用
python python_script.py filename
and in your Python script
并在您的 Python 脚本中
import sys
print sys.argv[1]
回答by miku
回答by HappyHacking
回答by burseaner
use in the script:
在脚本中使用：
echo $(python python_script.py arg1 arg2) > /dev/null
or
或者
python python_script.py "string arg" > /dev/null
The script will be executed without output.
该脚本将在没有输出的情况下执行。
回答by user77115
Embedded option:
嵌入式选项：
Wrap python code in a bash function.
将 python 代码包装在 bash 函数中。
#!/bin/bash
function current_datetime {
python - <<END
import datetime
print datetime.datetime.now()
END
}
# Call it
current_datetime
# Call it and capture the output
DT=$(current_datetime)
echo Current date and time: $DT
Use environment variables, to pass data into to your embedded python script.
使用环境变量将数据传递到您的嵌入式 python 脚本中。
#!/bin/bash
function line {
PYTHON_ARG="" python - <<END
import os
line_len = int(os.environ['PYTHON_ARG'])
print '-' * line_len
END
}
# Do it one way
line 80
# Do it another way
echo $(line 80)
http://bhfsteve.blogspot.se/2014/07/embedding-python-in-bash-scripts.html
http://bhfsteve.blogspot.se/2014/07/embedding-python-in-bash-scripts.html
回答by Dave Thebuskeruk
I have a bash script that calls a small python routine to display a message window. As I need to use killall to stop the python script I can't use the above method as it would then mean running killall python which could take out other python programmes so I use
我有一个 bash 脚本，它调用一个小的 python 例程来显示一个消息窗口。因为我需要使用 killall 来停止 python 脚本，所以我不能使用上面的方法，因为这意味着运行 killall python 可以取出其他 python 程序，所以我使用
pythonprog.py "$argument"&# The & returns control straight to the bash script so must be outside the backticks. The preview of this message is showing it without "`" either side of the command for some reason.
pythonprog.py "$argument"&# & 将控制权直接返回给 bash 脚本，因此必须在反引号之外。由于某种原因，此消息的预览显示命令两侧没有“`”。
As long as the python script will run from the cli by name rather than python pythonprog.py this works within the script. If you need more than one argument just use a space between each one within the quotes.
只要 python 脚本将按名称从 cli 运行而不是 python pythonprog.py 这在脚本中工作。如果您需要多个参数，只需在引号内的每个参数之间使用一个空格。
