Python3 在 os.popen() 语句中使用来自 Python 的变量 (WINDOWS)

Question

我站在下面的问题面前。我正在使用 python3.

构建一个小型卸载 Java 工具

我可以读出我需要的所有内容，但是当我尝试将卸载命令发送到 Windows 时，我无法正确完成解析。

搜索已安装软件的命令如下所示：

wmic_output = os.popen('''wmic product where "name like 'Java 8 Update %%'" get name''').read()

os.popen 字符串中没有任何变量，一切正常。现在尝试执行命令似乎更棘手...

    productname = str(uninstallcall[inx])
    # Check if Version is installed, if so uninstall
    wmic_output1 = os.popen('''wmic product where "name like '%s'" get name''').read()
    result1 = parse_wmic_output(wmic_output1 % (productname))

是的，productname 变量在这样做时打印得很好：/

使用此处找到的以下片段解析 Im：http://autosqa.com/2016/03/18/how-to-parse-wmic-output-with-python/:

def parse_wmic_output(text):
    result = []
    # remove empty lines
    lines = [s for s in text.splitlines() if s.strip()]
    # No Instance(s) Available
    if len(lines) == 0:
        return result
    header_line = lines[0]
    # Find headers and their positions
    headers = re.findall('\S+\s+|\S$', header_line)
    pos = [0]
    for header in headers:
        pos.append(pos[-1] + len(header))
    for i in range(len(headers)):
        headers[i] = headers[i].strip()
    # Parse each entries
    for r in range(1, len(lines)):
        row = {}
        for i in range(len(pos)-1):
            row[headers[i]] = lines[r][pos[i]:pos[i+1]].strip()
        result.append(row)
    return result

Answer 1

%s, are you trying to insert a variable into that position? if so you need to do "some %s variable" % variable_to_inser. Or a cleaner way, do f"some {productname} here" (f being important at the start of the string). – @Torxed

这解决了我的问题如下：

wmic_output = os.popen(f'''wmic product where "name like {variablename}" get name''').read()

Python3 在 os.popen() 语句中使用来自 Python 的变量 (WINDOWS)

Python3 Using Variables from Python in os.popen() statement (WINDOWS)

python

windows

python-3.7