将字符串作为参数传递给python脚本 [英] Passing a string as an argument to a python script

问题描述

我想将ZPL代码的字符串从一个python脚本传递到另一个python脚本.在第二个脚本中使用时，字符串格式错误.如何在不变形的情况下将字符串文字作为参数传递给另一个python脚本?

I want to pass a string of ZPL codes from one python script to another python script. The string becomes malformed when used in the second script. How can I pass a string literal as an argument to another python script without it being malformed?

原始字符串

^ XA ^ FO20,20 ^ BQ，2,3 ^ FDQA，001D4B02107A; 1001000; 49681207 ^ FS ^ FO50,50 ^ ADN，36,20 ^ FDMAC:001D4B02107A ^ FS ^ FO50,150 ^ ADN，36,20 ^ FDSN:1001000 ^ FS ^ FO50,250 ^ ADN，36,20 ^ FDCode:49681207 ^ FS ^ XZ

格式错误的字符串

XAFO20,20BQ，2,3FDQA，001D4B02107A; 1001000; 49681207FSFO50,50ADN，36,20FDMAC:

我在其中调用第二个脚本的代码

def printLabel():
    label = "^XA"+"^FO20,20^BQ,2,3^FDQA,"+"001D4B02107A;1001000;49681207"+"^FS"+"^FO50,50"+"^ADN,36,20"+"^FD"+"MAC: "+"001D4B02107A"+"^FS"+"^FO50,150"+"^ADN,36,20"+"^FD"+"SN: "+"1001000"+"^FS"+"^FO50,250"+"^ADN,36,20"+"^FD" + "Code: "+"49681207"+"^FS"+"^XZ"
    command = "zt320print.py "+label
    print command
    sys.stdout.flush()
    exitCode = os.system(str(command))

接收自变量的代码

if __name__ == "__main__":
    zplString = str(sys.argv[1])
    print zplString
    printZPL(zplString)

推荐答案

如果您的代码需要照原样编写(包括将ZPL代码串起来，并通过shell中介程序调用单独脚本的相当奇怪的方式)，并避免使用 subprocess )，您可以通过一些小的调整来解决您的问题:

If your code needs to be written just as it is (including the rather odd way of stringing together the ZPL code, and calling a separate script via a shell intermediary, and the avoidance of subprocess, for that matter), you can resolve your issue with a few small adjustments:

首先，将代码字符串用双引号引起来.

First, wrap your code string in double-quotes.

label= '"^XA'+"^FO20,20^BQ,2,3^FDQA,"+"001D4B02107A;1001000;49681207"+"^FS"+"^FO50,50"+"^ADN,36,20"+"^FD"+"MAC: "+"001D4B02107A"+"^FS"+"^FO50,150"+"^ADN,36,20"+"^FD"+"SN: "+"1001000"+"^FS"+"^FO50,250"+"^ADN,36,20"+"^FD" + "Code: "+"49681207"+"^FS"+'^XZ"'

第二，确保您实际上是在从外壳程序中调用 python :

Second, make sure you're actually calling python from the shell:

command = "python script2.py "+label

最后，如果您担心无法从命令行正确读取特殊字符，请使用 codecs.decode 中的 unicode_escape 来确保正确传输.
有关 unicode_escape 的更多信息，请参见此答案.

Finally, if you're concerned about special characters not being read in correctly from the command line, use unicode_escape from codecs.decode to ensure correct transmission.
See this answer for more on unicode_escape.

# contents of second script
if __name__ == "__main__":
    from codecs import decode
    import sys
    zplString = decode(sys.argv[1], 'unicode_escape')
    print(zplString)

现在，您第一个脚本的调用将正确传输代码:

Now the call from your first script will transmit the code correctly:

import sys
import os

sys.stdout.flush()
exitCode = os.system(str(command))

输出:

^XA^FO20,20^BQ,2,3^FDQA,001D4B02107A;1001000;49681207^FS^FO50,50^ADN,36,20^FDMAC: 001D4B02107A^FS^FO50,150^ADN,36,20^FDSN: 1001000^FS^FO50,250^ADN,36,20^FDCode: 49681207^FS^XZ

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