python用windowsAPI查找进程

要在Python中使用Windows API查找进程，你可以使用`ctypes`模块来调用相关函数。以下是一个示例代码，可以通过进程名查找进程：

import ctypes
from ctypes import wintypes

# 定义常量
PROCESS_QUERY_INFORMATION = 0x0400
PROCESS_VM_READ = 0x0010

# 定义结构体
class PROCESSENTRY32(ctypes.Structure):
    _fields_ = [
        ("dwSize", wintypes.DWORD),
        ("cntUsage", wintypes.DWORD),
        ("th32ProcessID", wintypes.DWORD),
        ("th32DefaultHeapID", ctypes.POINTER(wintypes.ULONG_PTR)),
        ("th32ModuleID", wintypes.DWORD),
        ("cntThreads", wintypes.DWORD),
        ("th32ParentProcessID", wintypes.DWORD),
        ("pcPriClassBase", wintypes.LONG),
        ("dwFlags", wintypes.DWORD),
        ("szExeFile", ctypes.c_char * 260)
    ]

# 调用CreateToolhelp32Snapshot函数
CreateToolhelp32Snapshot = ctypes.windll.kernel32.CreateToolhelp32Snapshot
CreateToolhelp32Snapshot.argtypes = [wintypes.DWORD, wintypes.DWORD]
CreateToolhelp32Snapshot.restype = wintypes.HANDLE

# 调用Process32First和Process32Next函数
Process32First = ctypes.windll.kernel32.Process32First
Process32First.argtypes = [wintypes.HANDLE, ctypes.POINTER(PROCESSENTRY32)]
Process32First.restype = wintypes.BOOL

Process32Next = ctypes.windll.kernel32.Process32Next
Process32Next.argtypes = [wintypes.HANDLE, ctypes.POINTER(PROCESSENTRY32)]
Process32Next.restype = wintypes.BOOL

def find_process_by_name(process_name):
    # 创建进程快照
    snapshot = CreateToolhelp32Snapshot(0x2, 0)

    # 初始化PROCESSENTRY32结构体
    pe32 = PROCESSENTRY32()
    pe32.dwSize = ctypes.sizeof(PROCESSENTRY32)

    # 遍历进程列表
    if Process32First(snapshot, ctypes.byref(pe32)):
        while True:
            # 判断进程名是否匹配
            if process_name.lower() == pe32.szExeFile.decode('utf-8').lower():
                process_id = pe32.th32ProcessID
                print("进程名: {}, 进程ID: {}".format(pe32.szExeFile.decode('utf-8'), process_id))

            # 获取下一个进程信息
            if not Process32Next(snapshot, ctypes.byref(pe32)):
                break

    # 关闭进程快照句柄
    ctypes.windll.kernel32.CloseHandle(snapshot)

# 测试示例
process_name = "notepad.exe"
find_process_by_name(process_name)

在上面的示例中，我们定义了`PROCESSENTRY32`结构体来存储进程信息。然后使用`CreateToolhelp32Snapshot`函数创建进程快照，并使用`Process32First`和`Process32Next`函数遍历进程列表。在遍历过程中，我们判断进程名是否匹配，并输出对应的进程名和进程ID。

你可以将`process_name`变量设置为你要查找的进程名，然后运行示例代码来查找进程。请注意，为了使用Windows API，你需要在Windows操作系统上运行此代码。